Using correlated noise of turbulent flow in a long-wavelength acoustic flowmeter to measure the average flow speed
Current methods to measure the flow of gaseous emissions from coal-burning power plant smokestacks have uncertainties of 5% to 20%, which is unsuitable if a carbon pricing program is implemented. As part of its Greenhouse Gas and Climate Science Measurements Program, the Fluid Metrology Group at the...
Ausführliche Beschreibung
Autor*in: |
Abbott, John Paul R [verfasserIn] |
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Erschienen: |
2017 |
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Rechteinformationen: |
Nutzungsrecht: © Acoustical Society of America |
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Systematik: |
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Übergeordnetes Werk: |
Enthalten in: The journal of the Acoustical Society of America - Melville, NY : AIP, 1929, 141(2017), 5, Seite 3690-3690 |
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Übergeordnetes Werk: |
volume:141 ; year:2017 ; number:5 ; pages:3690-3690 |
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DOI / URN: |
10.1121/1.4988034 |
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OLC1994829141 |
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520 | |a Current methods to measure the flow of gaseous emissions from coal-burning power plant smokestacks have uncertainties of 5% to 20%, which is unsuitable if a carbon pricing program is implemented. As part of its Greenhouse Gas and Climate Science Measurements Program, the Fluid Metrology Group at the National Institute of Standards and Technology (NIST) is investigating methods to reduce the uncertainty of flow measurements from smokestacks. In particular, NIST’s scale model long-wavelength acoustic flowmeter (LWAF) uses low-frequency plane waves to measure the average axial flow speed, V, of turbulent fluid flow in a duct with an uncertainty of 1%. To apply this technology to smokestacks, we are investigating cross-correlations of low-frequency flow noise. The spectral density of the measured flow noise is consistent with fluctuations smaller than the duct diameter D for f >> V/D. The amplitude and width of the correlation peak for broadband flow noise is shown to be dependent on V, and a model of this dependence is forthcoming. Our current work, developing this model, includes filtering the broadband data to determine phase shifts, modeling the effects of the radiation impedance, and examining effects on the broadband flow noise spectra. The results of these investigations are presented. | ||
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10.1121/1.4988034 doi PQ20170901 (DE-627)OLC1994829141 (DE-599)GBVOLC1994829141 (PRQ)scitation_primary_10_1121_1_49880340 (KEY)0112299120170000141000503690usingcorrelatednoiseofturbulentflowinalongwaveleng DE-627 ger DE-627 rakwb 530 DE-600 LING fid EQ 1000: AVZ rvk 33.12 bkl 50.36 bkl Abbott, John Paul R verfasserin aut Using correlated noise of turbulent flow in a long-wavelength acoustic flowmeter to measure the average flow speed 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Current methods to measure the flow of gaseous emissions from coal-burning power plant smokestacks have uncertainties of 5% to 20%, which is unsuitable if a carbon pricing program is implemented. As part of its Greenhouse Gas and Climate Science Measurements Program, the Fluid Metrology Group at the National Institute of Standards and Technology (NIST) is investigating methods to reduce the uncertainty of flow measurements from smokestacks. In particular, NIST’s scale model long-wavelength acoustic flowmeter (LWAF) uses low-frequency plane waves to measure the average axial flow speed, V, of turbulent fluid flow in a duct with an uncertainty of 1%. To apply this technology to smokestacks, we are investigating cross-correlations of low-frequency flow noise. The spectral density of the measured flow noise is consistent with fluctuations smaller than the duct diameter D for f >> V/D. The amplitude and width of the correlation peak for broadband flow noise is shown to be dependent on V, and a model of this dependence is forthcoming. Our current work, developing this model, includes filtering the broadband data to determine phase shifts, modeling the effects of the radiation impedance, and examining effects on the broadband flow noise spectra. The results of these investigations are presented. Nutzungsrecht: © Acoustical Society of America Gillis, Keith A oth Moldover, Michael oth Gorny, Lee oth Enthalten in The journal of the Acoustical Society of America Melville, NY : AIP, 1929 141(2017), 5, Seite 3690-3690 (DE-627)129550264 (DE-600)219231-7 (DE-576)015003663 0001-4966 nnns volume:141 year:2017 number:5 pages:3690-3690 http://dx.doi.org/10.1121/1.4988034 Volltext http://dx.doi.org/10.1121/1.4988034 GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-LING SSG-OLC-PHY SSG-OLC-MUS GBV_ILN_59 GBV_ILN_60 GBV_ILN_70 GBV_ILN_120 GBV_ILN_170 GBV_ILN_201 GBV_ILN_2006 GBV_ILN_2011 GBV_ILN_2027 GBV_ILN_2045 GBV_ILN_2192 GBV_ILN_2256 GBV_ILN_4219 GBV_ILN_4315 GBV_ILN_4319 GBV_ILN_4700 EQ 1000: 33.12 AVZ 50.36 AVZ AR 141 2017 5 3690-3690 |
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10.1121/1.4988034 doi PQ20170901 (DE-627)OLC1994829141 (DE-599)GBVOLC1994829141 (PRQ)scitation_primary_10_1121_1_49880340 (KEY)0112299120170000141000503690usingcorrelatednoiseofturbulentflowinalongwaveleng DE-627 ger DE-627 rakwb 530 DE-600 LING fid EQ 1000: AVZ rvk 33.12 bkl 50.36 bkl Abbott, John Paul R verfasserin aut Using correlated noise of turbulent flow in a long-wavelength acoustic flowmeter to measure the average flow speed 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Current methods to measure the flow of gaseous emissions from coal-burning power plant smokestacks have uncertainties of 5% to 20%, which is unsuitable if a carbon pricing program is implemented. As part of its Greenhouse Gas and Climate Science Measurements Program, the Fluid Metrology Group at the National Institute of Standards and Technology (NIST) is investigating methods to reduce the uncertainty of flow measurements from smokestacks. In particular, NIST’s scale model long-wavelength acoustic flowmeter (LWAF) uses low-frequency plane waves to measure the average axial flow speed, V, of turbulent fluid flow in a duct with an uncertainty of 1%. To apply this technology to smokestacks, we are investigating cross-correlations of low-frequency flow noise. The spectral density of the measured flow noise is consistent with fluctuations smaller than the duct diameter D for f >> V/D. The amplitude and width of the correlation peak for broadband flow noise is shown to be dependent on V, and a model of this dependence is forthcoming. Our current work, developing this model, includes filtering the broadband data to determine phase shifts, modeling the effects of the radiation impedance, and examining effects on the broadband flow noise spectra. The results of these investigations are presented. Nutzungsrecht: © Acoustical Society of America Gillis, Keith A oth Moldover, Michael oth Gorny, Lee oth Enthalten in The journal of the Acoustical Society of America Melville, NY : AIP, 1929 141(2017), 5, Seite 3690-3690 (DE-627)129550264 (DE-600)219231-7 (DE-576)015003663 0001-4966 nnns volume:141 year:2017 number:5 pages:3690-3690 http://dx.doi.org/10.1121/1.4988034 Volltext http://dx.doi.org/10.1121/1.4988034 GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-LING SSG-OLC-PHY SSG-OLC-MUS GBV_ILN_59 GBV_ILN_60 GBV_ILN_70 GBV_ILN_120 GBV_ILN_170 GBV_ILN_201 GBV_ILN_2006 GBV_ILN_2011 GBV_ILN_2027 GBV_ILN_2045 GBV_ILN_2192 GBV_ILN_2256 GBV_ILN_4219 GBV_ILN_4315 GBV_ILN_4319 GBV_ILN_4700 EQ 1000: 33.12 AVZ 50.36 AVZ AR 141 2017 5 3690-3690 |
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10.1121/1.4988034 doi PQ20170901 (DE-627)OLC1994829141 (DE-599)GBVOLC1994829141 (PRQ)scitation_primary_10_1121_1_49880340 (KEY)0112299120170000141000503690usingcorrelatednoiseofturbulentflowinalongwaveleng DE-627 ger DE-627 rakwb 530 DE-600 LING fid EQ 1000: AVZ rvk 33.12 bkl 50.36 bkl Abbott, John Paul R verfasserin aut Using correlated noise of turbulent flow in a long-wavelength acoustic flowmeter to measure the average flow speed 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Current methods to measure the flow of gaseous emissions from coal-burning power plant smokestacks have uncertainties of 5% to 20%, which is unsuitable if a carbon pricing program is implemented. As part of its Greenhouse Gas and Climate Science Measurements Program, the Fluid Metrology Group at the National Institute of Standards and Technology (NIST) is investigating methods to reduce the uncertainty of flow measurements from smokestacks. In particular, NIST’s scale model long-wavelength acoustic flowmeter (LWAF) uses low-frequency plane waves to measure the average axial flow speed, V, of turbulent fluid flow in a duct with an uncertainty of 1%. To apply this technology to smokestacks, we are investigating cross-correlations of low-frequency flow noise. The spectral density of the measured flow noise is consistent with fluctuations smaller than the duct diameter D for f >> V/D. The amplitude and width of the correlation peak for broadband flow noise is shown to be dependent on V, and a model of this dependence is forthcoming. Our current work, developing this model, includes filtering the broadband data to determine phase shifts, modeling the effects of the radiation impedance, and examining effects on the broadband flow noise spectra. The results of these investigations are presented. Nutzungsrecht: © Acoustical Society of America Gillis, Keith A oth Moldover, Michael oth Gorny, Lee oth Enthalten in The journal of the Acoustical Society of America Melville, NY : AIP, 1929 141(2017), 5, Seite 3690-3690 (DE-627)129550264 (DE-600)219231-7 (DE-576)015003663 0001-4966 nnns volume:141 year:2017 number:5 pages:3690-3690 http://dx.doi.org/10.1121/1.4988034 Volltext http://dx.doi.org/10.1121/1.4988034 GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-LING SSG-OLC-PHY SSG-OLC-MUS GBV_ILN_59 GBV_ILN_60 GBV_ILN_70 GBV_ILN_120 GBV_ILN_170 GBV_ILN_201 GBV_ILN_2006 GBV_ILN_2011 GBV_ILN_2027 GBV_ILN_2045 GBV_ILN_2192 GBV_ILN_2256 GBV_ILN_4219 GBV_ILN_4315 GBV_ILN_4319 GBV_ILN_4700 EQ 1000: 33.12 AVZ 50.36 AVZ AR 141 2017 5 3690-3690 |
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10.1121/1.4988034 doi PQ20170901 (DE-627)OLC1994829141 (DE-599)GBVOLC1994829141 (PRQ)scitation_primary_10_1121_1_49880340 (KEY)0112299120170000141000503690usingcorrelatednoiseofturbulentflowinalongwaveleng DE-627 ger DE-627 rakwb 530 DE-600 LING fid EQ 1000: AVZ rvk 33.12 bkl 50.36 bkl Abbott, John Paul R verfasserin aut Using correlated noise of turbulent flow in a long-wavelength acoustic flowmeter to measure the average flow speed 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Current methods to measure the flow of gaseous emissions from coal-burning power plant smokestacks have uncertainties of 5% to 20%, which is unsuitable if a carbon pricing program is implemented. As part of its Greenhouse Gas and Climate Science Measurements Program, the Fluid Metrology Group at the National Institute of Standards and Technology (NIST) is investigating methods to reduce the uncertainty of flow measurements from smokestacks. In particular, NIST’s scale model long-wavelength acoustic flowmeter (LWAF) uses low-frequency plane waves to measure the average axial flow speed, V, of turbulent fluid flow in a duct with an uncertainty of 1%. To apply this technology to smokestacks, we are investigating cross-correlations of low-frequency flow noise. The spectral density of the measured flow noise is consistent with fluctuations smaller than the duct diameter D for f >> V/D. The amplitude and width of the correlation peak for broadband flow noise is shown to be dependent on V, and a model of this dependence is forthcoming. Our current work, developing this model, includes filtering the broadband data to determine phase shifts, modeling the effects of the radiation impedance, and examining effects on the broadband flow noise spectra. The results of these investigations are presented. Nutzungsrecht: © Acoustical Society of America Gillis, Keith A oth Moldover, Michael oth Gorny, Lee oth Enthalten in The journal of the Acoustical Society of America Melville, NY : AIP, 1929 141(2017), 5, Seite 3690-3690 (DE-627)129550264 (DE-600)219231-7 (DE-576)015003663 0001-4966 nnns volume:141 year:2017 number:5 pages:3690-3690 http://dx.doi.org/10.1121/1.4988034 Volltext http://dx.doi.org/10.1121/1.4988034 GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-LING SSG-OLC-PHY SSG-OLC-MUS GBV_ILN_59 GBV_ILN_60 GBV_ILN_70 GBV_ILN_120 GBV_ILN_170 GBV_ILN_201 GBV_ILN_2006 GBV_ILN_2011 GBV_ILN_2027 GBV_ILN_2045 GBV_ILN_2192 GBV_ILN_2256 GBV_ILN_4219 GBV_ILN_4315 GBV_ILN_4319 GBV_ILN_4700 EQ 1000: 33.12 AVZ 50.36 AVZ AR 141 2017 5 3690-3690 |
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10.1121/1.4988034 doi PQ20170901 (DE-627)OLC1994829141 (DE-599)GBVOLC1994829141 (PRQ)scitation_primary_10_1121_1_49880340 (KEY)0112299120170000141000503690usingcorrelatednoiseofturbulentflowinalongwaveleng DE-627 ger DE-627 rakwb 530 DE-600 LING fid EQ 1000: AVZ rvk 33.12 bkl 50.36 bkl Abbott, John Paul R verfasserin aut Using correlated noise of turbulent flow in a long-wavelength acoustic flowmeter to measure the average flow speed 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Current methods to measure the flow of gaseous emissions from coal-burning power plant smokestacks have uncertainties of 5% to 20%, which is unsuitable if a carbon pricing program is implemented. As part of its Greenhouse Gas and Climate Science Measurements Program, the Fluid Metrology Group at the National Institute of Standards and Technology (NIST) is investigating methods to reduce the uncertainty of flow measurements from smokestacks. In particular, NIST’s scale model long-wavelength acoustic flowmeter (LWAF) uses low-frequency plane waves to measure the average axial flow speed, V, of turbulent fluid flow in a duct with an uncertainty of 1%. To apply this technology to smokestacks, we are investigating cross-correlations of low-frequency flow noise. The spectral density of the measured flow noise is consistent with fluctuations smaller than the duct diameter D for f >> V/D. The amplitude and width of the correlation peak for broadband flow noise is shown to be dependent on V, and a model of this dependence is forthcoming. Our current work, developing this model, includes filtering the broadband data to determine phase shifts, modeling the effects of the radiation impedance, and examining effects on the broadband flow noise spectra. The results of these investigations are presented. Nutzungsrecht: © Acoustical Society of America Gillis, Keith A oth Moldover, Michael oth Gorny, Lee oth Enthalten in The journal of the Acoustical Society of America Melville, NY : AIP, 1929 141(2017), 5, Seite 3690-3690 (DE-627)129550264 (DE-600)219231-7 (DE-576)015003663 0001-4966 nnns volume:141 year:2017 number:5 pages:3690-3690 http://dx.doi.org/10.1121/1.4988034 Volltext http://dx.doi.org/10.1121/1.4988034 GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-LING SSG-OLC-PHY SSG-OLC-MUS GBV_ILN_59 GBV_ILN_60 GBV_ILN_70 GBV_ILN_120 GBV_ILN_170 GBV_ILN_201 GBV_ILN_2006 GBV_ILN_2011 GBV_ILN_2027 GBV_ILN_2045 GBV_ILN_2192 GBV_ILN_2256 GBV_ILN_4219 GBV_ILN_4315 GBV_ILN_4319 GBV_ILN_4700 EQ 1000: 33.12 AVZ 50.36 AVZ AR 141 2017 5 3690-3690 |
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using correlated noise of turbulent flow in a long-wavelength acoustic flowmeter to measure the average flow speed |
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Using correlated noise of turbulent flow in a long-wavelength acoustic flowmeter to measure the average flow speed |
abstract |
Current methods to measure the flow of gaseous emissions from coal-burning power plant smokestacks have uncertainties of 5% to 20%, which is unsuitable if a carbon pricing program is implemented. As part of its Greenhouse Gas and Climate Science Measurements Program, the Fluid Metrology Group at the National Institute of Standards and Technology (NIST) is investigating methods to reduce the uncertainty of flow measurements from smokestacks. In particular, NIST’s scale model long-wavelength acoustic flowmeter (LWAF) uses low-frequency plane waves to measure the average axial flow speed, V, of turbulent fluid flow in a duct with an uncertainty of 1%. To apply this technology to smokestacks, we are investigating cross-correlations of low-frequency flow noise. The spectral density of the measured flow noise is consistent with fluctuations smaller than the duct diameter D for f >> V/D. The amplitude and width of the correlation peak for broadband flow noise is shown to be dependent on V, and a model of this dependence is forthcoming. Our current work, developing this model, includes filtering the broadband data to determine phase shifts, modeling the effects of the radiation impedance, and examining effects on the broadband flow noise spectra. The results of these investigations are presented. |
abstractGer |
Current methods to measure the flow of gaseous emissions from coal-burning power plant smokestacks have uncertainties of 5% to 20%, which is unsuitable if a carbon pricing program is implemented. As part of its Greenhouse Gas and Climate Science Measurements Program, the Fluid Metrology Group at the National Institute of Standards and Technology (NIST) is investigating methods to reduce the uncertainty of flow measurements from smokestacks. In particular, NIST’s scale model long-wavelength acoustic flowmeter (LWAF) uses low-frequency plane waves to measure the average axial flow speed, V, of turbulent fluid flow in a duct with an uncertainty of 1%. To apply this technology to smokestacks, we are investigating cross-correlations of low-frequency flow noise. The spectral density of the measured flow noise is consistent with fluctuations smaller than the duct diameter D for f >> V/D. The amplitude and width of the correlation peak for broadband flow noise is shown to be dependent on V, and a model of this dependence is forthcoming. Our current work, developing this model, includes filtering the broadband data to determine phase shifts, modeling the effects of the radiation impedance, and examining effects on the broadband flow noise spectra. The results of these investigations are presented. |
abstract_unstemmed |
Current methods to measure the flow of gaseous emissions from coal-burning power plant smokestacks have uncertainties of 5% to 20%, which is unsuitable if a carbon pricing program is implemented. As part of its Greenhouse Gas and Climate Science Measurements Program, the Fluid Metrology Group at the National Institute of Standards and Technology (NIST) is investigating methods to reduce the uncertainty of flow measurements from smokestacks. In particular, NIST’s scale model long-wavelength acoustic flowmeter (LWAF) uses low-frequency plane waves to measure the average axial flow speed, V, of turbulent fluid flow in a duct with an uncertainty of 1%. To apply this technology to smokestacks, we are investigating cross-correlations of low-frequency flow noise. The spectral density of the measured flow noise is consistent with fluctuations smaller than the duct diameter D for f >> V/D. The amplitude and width of the correlation peak for broadband flow noise is shown to be dependent on V, and a model of this dependence is forthcoming. Our current work, developing this model, includes filtering the broadband data to determine phase shifts, modeling the effects of the radiation impedance, and examining effects on the broadband flow noise spectra. The results of these investigations are presented. |
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title_short |
Using correlated noise of turbulent flow in a long-wavelength acoustic flowmeter to measure the average flow speed |
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