Particle concentration measurements by phase-doppler anemometry in complex dispersed two-phase flows
Abstract Particle concentration or mass flux measurements by phase-Doppler anemometry are based on counting the number of particles crossing the probe volume. In complex particulate flows this requires the knowledge of the particle size-dependent cross-section of the measurement volume perpendicular...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Sommerfeld, M. [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
1995 |
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| Schlagwörter: |
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| Anmerkung: |
© Springer-Verlag 1995 |
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| Übergeordnetes Werk: |
Enthalten in: Experiments in fluids - Springer-Verlag, 1983, 18(1995), 3 vom: Jan., Seite 187-198 |
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| Übergeordnetes Werk: |
volume:18 ; year:1995 ; number:3 ; month:01 ; pages:187-198 |
| Links: |
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| DOI / URN: |
10.1007/BF00230264 |
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| Katalog-ID: |
OLC2074330561 |
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| 245 | 1 | 0 | |a Particle concentration measurements by phase-doppler anemometry in complex dispersed two-phase flows |
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| 520 | |a Abstract Particle concentration or mass flux measurements by phase-Doppler anemometry are based on counting the number of particles crossing the probe volume. In complex particulate flows this requires the knowledge of the particle size-dependent cross-section of the measurement volume perpendicular to the instantaneous particle velocity for each sample. A new method is presented which allows to estimate the instantaneous particle velocity using a one-component PDA-system with the aid of the integral value under the envelope of the Doppler signal. The envelope is reliably determined by a recently developed analogue burst detection electronic circuit using narrow band-pass filters and a synchro detector. The particle size-dependent measurement volume is obtained by the mean log-arithmic amplitude method introduced by Qiu and Sommerfeld (1992). The special signal processing requirements for realizing this method were implemented in a novel signal processor which additionally involves a burst detection based on an online estimation of the signal-to-noise ratio (SNR) and hence the data aquisition is only triggered for signals above a pre-set SNR level. The estimation of the signal frequency and phase is based on the calculation of the cross-spectral density using a hardware FFT (Fast Fourier Transform) chip. In order to demonstrate the accuracy of the novel method for particle concentration and mass flux determination, measurements were performed in a liquid spray and a particle laden swirling flow. Especially in the swirling flow, the particles exhibit random trajectories through the measurement volume and the powerfulness of the present method is demonstrated especially for this complex flow. | ||
| 650 | 4 | |a Fast Fourier Transform | |
| 650 | 4 | |a Particle Concentration | |
| 650 | 4 | |a Mass Flux | |
| 650 | 4 | |a Swirling Flow | |
| 650 | 4 | |a Liquid Spray | |
| 700 | 1 | |a Qiu, H. -H. |4 aut | |
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10.1007/BF00230264 doi (DE-627)OLC2074330561 (DE-He213)BF00230264-p DE-627 ger DE-627 rakwb eng 620 530 VZ 530 VZ Sommerfeld, M. verfasserin aut Particle concentration measurements by phase-doppler anemometry in complex dispersed two-phase flows 1995 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 1995 Abstract Particle concentration or mass flux measurements by phase-Doppler anemometry are based on counting the number of particles crossing the probe volume. In complex particulate flows this requires the knowledge of the particle size-dependent cross-section of the measurement volume perpendicular to the instantaneous particle velocity for each sample. A new method is presented which allows to estimate the instantaneous particle velocity using a one-component PDA-system with the aid of the integral value under the envelope of the Doppler signal. The envelope is reliably determined by a recently developed analogue burst detection electronic circuit using narrow band-pass filters and a synchro detector. The particle size-dependent measurement volume is obtained by the mean log-arithmic amplitude method introduced by Qiu and Sommerfeld (1992). The special signal processing requirements for realizing this method were implemented in a novel signal processor which additionally involves a burst detection based on an online estimation of the signal-to-noise ratio (SNR) and hence the data aquisition is only triggered for signals above a pre-set SNR level. The estimation of the signal frequency and phase is based on the calculation of the cross-spectral density using a hardware FFT (Fast Fourier Transform) chip. In order to demonstrate the accuracy of the novel method for particle concentration and mass flux determination, measurements were performed in a liquid spray and a particle laden swirling flow. Especially in the swirling flow, the particles exhibit random trajectories through the measurement volume and the powerfulness of the present method is demonstrated especially for this complex flow. Fast Fourier Transform Particle Concentration Mass Flux Swirling Flow Liquid Spray Qiu, H. -H. aut Enthalten in Experiments in fluids Springer-Verlag, 1983 18(1995), 3 vom: Jan., Seite 187-198 (DE-627)130443794 (DE-600)710083-8 (DE-576)015977404 0723-4864 nnns volume:18 year:1995 number:3 month:01 pages:187-198 https://doi.org/10.1007/BF00230264 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_21 GBV_ILN_32 GBV_ILN_40 GBV_ILN_65 GBV_ILN_70 GBV_ILN_170 GBV_ILN_185 GBV_ILN_2006 GBV_ILN_2012 GBV_ILN_2014 GBV_ILN_2016 GBV_ILN_2018 GBV_ILN_2020 GBV_ILN_4046 GBV_ILN_4103 GBV_ILN_4277 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4700 AR 18 1995 3 01 187-198 |
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10.1007/BF00230264 doi (DE-627)OLC2074330561 (DE-He213)BF00230264-p DE-627 ger DE-627 rakwb eng 620 530 VZ 530 VZ Sommerfeld, M. verfasserin aut Particle concentration measurements by phase-doppler anemometry in complex dispersed two-phase flows 1995 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 1995 Abstract Particle concentration or mass flux measurements by phase-Doppler anemometry are based on counting the number of particles crossing the probe volume. In complex particulate flows this requires the knowledge of the particle size-dependent cross-section of the measurement volume perpendicular to the instantaneous particle velocity for each sample. A new method is presented which allows to estimate the instantaneous particle velocity using a one-component PDA-system with the aid of the integral value under the envelope of the Doppler signal. The envelope is reliably determined by a recently developed analogue burst detection electronic circuit using narrow band-pass filters and a synchro detector. The particle size-dependent measurement volume is obtained by the mean log-arithmic amplitude method introduced by Qiu and Sommerfeld (1992). The special signal processing requirements for realizing this method were implemented in a novel signal processor which additionally involves a burst detection based on an online estimation of the signal-to-noise ratio (SNR) and hence the data aquisition is only triggered for signals above a pre-set SNR level. The estimation of the signal frequency and phase is based on the calculation of the cross-spectral density using a hardware FFT (Fast Fourier Transform) chip. In order to demonstrate the accuracy of the novel method for particle concentration and mass flux determination, measurements were performed in a liquid spray and a particle laden swirling flow. Especially in the swirling flow, the particles exhibit random trajectories through the measurement volume and the powerfulness of the present method is demonstrated especially for this complex flow. Fast Fourier Transform Particle Concentration Mass Flux Swirling Flow Liquid Spray Qiu, H. -H. aut Enthalten in Experiments in fluids Springer-Verlag, 1983 18(1995), 3 vom: Jan., Seite 187-198 (DE-627)130443794 (DE-600)710083-8 (DE-576)015977404 0723-4864 nnns volume:18 year:1995 number:3 month:01 pages:187-198 https://doi.org/10.1007/BF00230264 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_21 GBV_ILN_32 GBV_ILN_40 GBV_ILN_65 GBV_ILN_70 GBV_ILN_170 GBV_ILN_185 GBV_ILN_2006 GBV_ILN_2012 GBV_ILN_2014 GBV_ILN_2016 GBV_ILN_2018 GBV_ILN_2020 GBV_ILN_4046 GBV_ILN_4103 GBV_ILN_4277 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4700 AR 18 1995 3 01 187-198 |
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10.1007/BF00230264 doi (DE-627)OLC2074330561 (DE-He213)BF00230264-p DE-627 ger DE-627 rakwb eng 620 530 VZ 530 VZ Sommerfeld, M. verfasserin aut Particle concentration measurements by phase-doppler anemometry in complex dispersed two-phase flows 1995 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 1995 Abstract Particle concentration or mass flux measurements by phase-Doppler anemometry are based on counting the number of particles crossing the probe volume. In complex particulate flows this requires the knowledge of the particle size-dependent cross-section of the measurement volume perpendicular to the instantaneous particle velocity for each sample. A new method is presented which allows to estimate the instantaneous particle velocity using a one-component PDA-system with the aid of the integral value under the envelope of the Doppler signal. The envelope is reliably determined by a recently developed analogue burst detection electronic circuit using narrow band-pass filters and a synchro detector. The particle size-dependent measurement volume is obtained by the mean log-arithmic amplitude method introduced by Qiu and Sommerfeld (1992). The special signal processing requirements for realizing this method were implemented in a novel signal processor which additionally involves a burst detection based on an online estimation of the signal-to-noise ratio (SNR) and hence the data aquisition is only triggered for signals above a pre-set SNR level. The estimation of the signal frequency and phase is based on the calculation of the cross-spectral density using a hardware FFT (Fast Fourier Transform) chip. In order to demonstrate the accuracy of the novel method for particle concentration and mass flux determination, measurements were performed in a liquid spray and a particle laden swirling flow. Especially in the swirling flow, the particles exhibit random trajectories through the measurement volume and the powerfulness of the present method is demonstrated especially for this complex flow. Fast Fourier Transform Particle Concentration Mass Flux Swirling Flow Liquid Spray Qiu, H. -H. aut Enthalten in Experiments in fluids Springer-Verlag, 1983 18(1995), 3 vom: Jan., Seite 187-198 (DE-627)130443794 (DE-600)710083-8 (DE-576)015977404 0723-4864 nnns volume:18 year:1995 number:3 month:01 pages:187-198 https://doi.org/10.1007/BF00230264 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_21 GBV_ILN_32 GBV_ILN_40 GBV_ILN_65 GBV_ILN_70 GBV_ILN_170 GBV_ILN_185 GBV_ILN_2006 GBV_ILN_2012 GBV_ILN_2014 GBV_ILN_2016 GBV_ILN_2018 GBV_ILN_2020 GBV_ILN_4046 GBV_ILN_4103 GBV_ILN_4277 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4700 AR 18 1995 3 01 187-198 |
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10.1007/BF00230264 doi (DE-627)OLC2074330561 (DE-He213)BF00230264-p DE-627 ger DE-627 rakwb eng 620 530 VZ 530 VZ Sommerfeld, M. verfasserin aut Particle concentration measurements by phase-doppler anemometry in complex dispersed two-phase flows 1995 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 1995 Abstract Particle concentration or mass flux measurements by phase-Doppler anemometry are based on counting the number of particles crossing the probe volume. In complex particulate flows this requires the knowledge of the particle size-dependent cross-section of the measurement volume perpendicular to the instantaneous particle velocity for each sample. A new method is presented which allows to estimate the instantaneous particle velocity using a one-component PDA-system with the aid of the integral value under the envelope of the Doppler signal. The envelope is reliably determined by a recently developed analogue burst detection electronic circuit using narrow band-pass filters and a synchro detector. The particle size-dependent measurement volume is obtained by the mean log-arithmic amplitude method introduced by Qiu and Sommerfeld (1992). The special signal processing requirements for realizing this method were implemented in a novel signal processor which additionally involves a burst detection based on an online estimation of the signal-to-noise ratio (SNR) and hence the data aquisition is only triggered for signals above a pre-set SNR level. The estimation of the signal frequency and phase is based on the calculation of the cross-spectral density using a hardware FFT (Fast Fourier Transform) chip. In order to demonstrate the accuracy of the novel method for particle concentration and mass flux determination, measurements were performed in a liquid spray and a particle laden swirling flow. Especially in the swirling flow, the particles exhibit random trajectories through the measurement volume and the powerfulness of the present method is demonstrated especially for this complex flow. Fast Fourier Transform Particle Concentration Mass Flux Swirling Flow Liquid Spray Qiu, H. -H. aut Enthalten in Experiments in fluids Springer-Verlag, 1983 18(1995), 3 vom: Jan., Seite 187-198 (DE-627)130443794 (DE-600)710083-8 (DE-576)015977404 0723-4864 nnns volume:18 year:1995 number:3 month:01 pages:187-198 https://doi.org/10.1007/BF00230264 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_21 GBV_ILN_32 GBV_ILN_40 GBV_ILN_65 GBV_ILN_70 GBV_ILN_170 GBV_ILN_185 GBV_ILN_2006 GBV_ILN_2012 GBV_ILN_2014 GBV_ILN_2016 GBV_ILN_2018 GBV_ILN_2020 GBV_ILN_4046 GBV_ILN_4103 GBV_ILN_4277 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4700 AR 18 1995 3 01 187-198 |
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10.1007/BF00230264 doi (DE-627)OLC2074330561 (DE-He213)BF00230264-p DE-627 ger DE-627 rakwb eng 620 530 VZ 530 VZ Sommerfeld, M. verfasserin aut Particle concentration measurements by phase-doppler anemometry in complex dispersed two-phase flows 1995 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 1995 Abstract Particle concentration or mass flux measurements by phase-Doppler anemometry are based on counting the number of particles crossing the probe volume. In complex particulate flows this requires the knowledge of the particle size-dependent cross-section of the measurement volume perpendicular to the instantaneous particle velocity for each sample. A new method is presented which allows to estimate the instantaneous particle velocity using a one-component PDA-system with the aid of the integral value under the envelope of the Doppler signal. The envelope is reliably determined by a recently developed analogue burst detection electronic circuit using narrow band-pass filters and a synchro detector. The particle size-dependent measurement volume is obtained by the mean log-arithmic amplitude method introduced by Qiu and Sommerfeld (1992). The special signal processing requirements for realizing this method were implemented in a novel signal processor which additionally involves a burst detection based on an online estimation of the signal-to-noise ratio (SNR) and hence the data aquisition is only triggered for signals above a pre-set SNR level. The estimation of the signal frequency and phase is based on the calculation of the cross-spectral density using a hardware FFT (Fast Fourier Transform) chip. In order to demonstrate the accuracy of the novel method for particle concentration and mass flux determination, measurements were performed in a liquid spray and a particle laden swirling flow. Especially in the swirling flow, the particles exhibit random trajectories through the measurement volume and the powerfulness of the present method is demonstrated especially for this complex flow. Fast Fourier Transform Particle Concentration Mass Flux Swirling Flow Liquid Spray Qiu, H. -H. aut Enthalten in Experiments in fluids Springer-Verlag, 1983 18(1995), 3 vom: Jan., Seite 187-198 (DE-627)130443794 (DE-600)710083-8 (DE-576)015977404 0723-4864 nnns volume:18 year:1995 number:3 month:01 pages:187-198 https://doi.org/10.1007/BF00230264 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_21 GBV_ILN_32 GBV_ILN_40 GBV_ILN_65 GBV_ILN_70 GBV_ILN_170 GBV_ILN_185 GBV_ILN_2006 GBV_ILN_2012 GBV_ILN_2014 GBV_ILN_2016 GBV_ILN_2018 GBV_ILN_2020 GBV_ILN_4046 GBV_ILN_4103 GBV_ILN_4277 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4700 AR 18 1995 3 01 187-198 |
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Enthalten in Experiments in fluids 18(1995), 3 vom: Jan., Seite 187-198 volume:18 year:1995 number:3 month:01 pages:187-198 |
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Particle concentration measurements by phase-doppler anemometry in complex dispersed two-phase flows |
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Abstract Particle concentration or mass flux measurements by phase-Doppler anemometry are based on counting the number of particles crossing the probe volume. In complex particulate flows this requires the knowledge of the particle size-dependent cross-section of the measurement volume perpendicular to the instantaneous particle velocity for each sample. A new method is presented which allows to estimate the instantaneous particle velocity using a one-component PDA-system with the aid of the integral value under the envelope of the Doppler signal. The envelope is reliably determined by a recently developed analogue burst detection electronic circuit using narrow band-pass filters and a synchro detector. The particle size-dependent measurement volume is obtained by the mean log-arithmic amplitude method introduced by Qiu and Sommerfeld (1992). The special signal processing requirements for realizing this method were implemented in a novel signal processor which additionally involves a burst detection based on an online estimation of the signal-to-noise ratio (SNR) and hence the data aquisition is only triggered for signals above a pre-set SNR level. The estimation of the signal frequency and phase is based on the calculation of the cross-spectral density using a hardware FFT (Fast Fourier Transform) chip. In order to demonstrate the accuracy of the novel method for particle concentration and mass flux determination, measurements were performed in a liquid spray and a particle laden swirling flow. Especially in the swirling flow, the particles exhibit random trajectories through the measurement volume and the powerfulness of the present method is demonstrated especially for this complex flow. © Springer-Verlag 1995 |
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Abstract Particle concentration or mass flux measurements by phase-Doppler anemometry are based on counting the number of particles crossing the probe volume. In complex particulate flows this requires the knowledge of the particle size-dependent cross-section of the measurement volume perpendicular to the instantaneous particle velocity for each sample. A new method is presented which allows to estimate the instantaneous particle velocity using a one-component PDA-system with the aid of the integral value under the envelope of the Doppler signal. The envelope is reliably determined by a recently developed analogue burst detection electronic circuit using narrow band-pass filters and a synchro detector. The particle size-dependent measurement volume is obtained by the mean log-arithmic amplitude method introduced by Qiu and Sommerfeld (1992). The special signal processing requirements for realizing this method were implemented in a novel signal processor which additionally involves a burst detection based on an online estimation of the signal-to-noise ratio (SNR) and hence the data aquisition is only triggered for signals above a pre-set SNR level. The estimation of the signal frequency and phase is based on the calculation of the cross-spectral density using a hardware FFT (Fast Fourier Transform) chip. In order to demonstrate the accuracy of the novel method for particle concentration and mass flux determination, measurements were performed in a liquid spray and a particle laden swirling flow. Especially in the swirling flow, the particles exhibit random trajectories through the measurement volume and the powerfulness of the present method is demonstrated especially for this complex flow. © Springer-Verlag 1995 |
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Abstract Particle concentration or mass flux measurements by phase-Doppler anemometry are based on counting the number of particles crossing the probe volume. In complex particulate flows this requires the knowledge of the particle size-dependent cross-section of the measurement volume perpendicular to the instantaneous particle velocity for each sample. A new method is presented which allows to estimate the instantaneous particle velocity using a one-component PDA-system with the aid of the integral value under the envelope of the Doppler signal. The envelope is reliably determined by a recently developed analogue burst detection electronic circuit using narrow band-pass filters and a synchro detector. The particle size-dependent measurement volume is obtained by the mean log-arithmic amplitude method introduced by Qiu and Sommerfeld (1992). The special signal processing requirements for realizing this method were implemented in a novel signal processor which additionally involves a burst detection based on an online estimation of the signal-to-noise ratio (SNR) and hence the data aquisition is only triggered for signals above a pre-set SNR level. The estimation of the signal frequency and phase is based on the calculation of the cross-spectral density using a hardware FFT (Fast Fourier Transform) chip. In order to demonstrate the accuracy of the novel method for particle concentration and mass flux determination, measurements were performed in a liquid spray and a particle laden swirling flow. Especially in the swirling flow, the particles exhibit random trajectories through the measurement volume and the powerfulness of the present method is demonstrated especially for this complex flow. © Springer-Verlag 1995 |
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