Acceleration from short-duration blast
Abstract The blast-induced motion of spheres has been studied experimentally where the shock wave is rapidly decaying during the period that quasi-steady acceleration would be developed in the case of a step-function shock wave as considered in most shock-tube studies. The motion of sphere models ra...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Ritzel, D. V. [verfasserIn] |
|---|
| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2017 |
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| Schlagwörter: |
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| Anmerkung: |
© Springer-Verlag GmbH Germany (outside the USA) 2017 |
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| Übergeordnetes Werk: |
Enthalten in: Shock waves - Springer Berlin Heidelberg, 1991, 28(2017), 1 vom: 23. Okt., Seite 101-114 |
|---|---|
| Übergeordnetes Werk: |
volume:28 ; year:2017 ; number:1 ; day:23 ; month:10 ; pages:101-114 |
| Links: |
|---|
| DOI / URN: |
10.1007/s00193-017-0768-y |
|---|
| Katalog-ID: |
OLC2057900606 |
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| 520 | |a Abstract The blast-induced motion of spheres has been studied experimentally where the shock wave is rapidly decaying during the period that quasi-steady acceleration would be developed in the case of a step-function shock wave as considered in most shock-tube studies. The motion of sphere models ranging from 39 to 251 mm in diameter and having a range of densities was assessed using the “free-flight” method in a simulator specially designed to replicate the decaying shock wave profile of spherical blast including negative phase and positive entropy gradient. A standardized blast-wave simulation of 125 kPa and 6-ms positive-phase duration was applied for all experiments. In all cases, there are three phases to the motion: a relatively low “kickoff” velocity from the shock diffraction, acceleration or deceleration during the positive duration, then deceleration through the negative phase and subsequent quiescent air. The unexpected deceleration of larger spheres after their kickoff velocity during the decaying yet high-speed flow of the blast wave seems associated with the persistence of a ring vortex on the downstream side of the sphere. The flow is entirely unsteady with initial forces dominated by the shock diffraction; therefore, the early motion of spheres under such conditions is not governed by quasi-steady drag as in classical aerodynamics. The work will help establish scaling rules for model studies of blast-induced motion relevant to improvised explosive devices, and preliminary results are shown for motion imparted to a human skull surrogate. | ||
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10.1007/s00193-017-0768-y doi (DE-627)OLC2057900606 (DE-He213)s00193-017-0768-y-p DE-627 ger DE-627 rakwb eng 530 VZ Ritzel, D. V. verfasserin (orcid)0000-0002-9358-3991 aut Acceleration from short-duration blast 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag GmbH Germany (outside the USA) 2017 Abstract The blast-induced motion of spheres has been studied experimentally where the shock wave is rapidly decaying during the period that quasi-steady acceleration would be developed in the case of a step-function shock wave as considered in most shock-tube studies. The motion of sphere models ranging from 39 to 251 mm in diameter and having a range of densities was assessed using the “free-flight” method in a simulator specially designed to replicate the decaying shock wave profile of spherical blast including negative phase and positive entropy gradient. A standardized blast-wave simulation of 125 kPa and 6-ms positive-phase duration was applied for all experiments. In all cases, there are three phases to the motion: a relatively low “kickoff” velocity from the shock diffraction, acceleration or deceleration during the positive duration, then deceleration through the negative phase and subsequent quiescent air. The unexpected deceleration of larger spheres after their kickoff velocity during the decaying yet high-speed flow of the blast wave seems associated with the persistence of a ring vortex on the downstream side of the sphere. The flow is entirely unsteady with initial forces dominated by the shock diffraction; therefore, the early motion of spheres under such conditions is not governed by quasi-steady drag as in classical aerodynamics. The work will help establish scaling rules for model studies of blast-induced motion relevant to improvised explosive devices, and preliminary results are shown for motion imparted to a human skull surrogate. bTBI Blast simulators Blast effects Blast scaling Blast-induced motion Van Albert, S. aut Sajja, V. aut Long, J. aut Enthalten in Shock waves Springer Berlin Heidelberg, 1991 28(2017), 1 vom: 23. Okt., Seite 101-114 (DE-627)130966657 (DE-600)1068310-0 (DE-576)025185977 0938-1287 nnns volume:28 year:2017 number:1 day:23 month:10 pages:101-114 https://doi.org/10.1007/s00193-017-0768-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_70 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4277 AR 28 2017 1 23 10 101-114 |
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10.1007/s00193-017-0768-y doi (DE-627)OLC2057900606 (DE-He213)s00193-017-0768-y-p DE-627 ger DE-627 rakwb eng 530 VZ Ritzel, D. V. verfasserin (orcid)0000-0002-9358-3991 aut Acceleration from short-duration blast 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag GmbH Germany (outside the USA) 2017 Abstract The blast-induced motion of spheres has been studied experimentally where the shock wave is rapidly decaying during the period that quasi-steady acceleration would be developed in the case of a step-function shock wave as considered in most shock-tube studies. The motion of sphere models ranging from 39 to 251 mm in diameter and having a range of densities was assessed using the “free-flight” method in a simulator specially designed to replicate the decaying shock wave profile of spherical blast including negative phase and positive entropy gradient. A standardized blast-wave simulation of 125 kPa and 6-ms positive-phase duration was applied for all experiments. In all cases, there are three phases to the motion: a relatively low “kickoff” velocity from the shock diffraction, acceleration or deceleration during the positive duration, then deceleration through the negative phase and subsequent quiescent air. The unexpected deceleration of larger spheres after their kickoff velocity during the decaying yet high-speed flow of the blast wave seems associated with the persistence of a ring vortex on the downstream side of the sphere. The flow is entirely unsteady with initial forces dominated by the shock diffraction; therefore, the early motion of spheres under such conditions is not governed by quasi-steady drag as in classical aerodynamics. The work will help establish scaling rules for model studies of blast-induced motion relevant to improvised explosive devices, and preliminary results are shown for motion imparted to a human skull surrogate. bTBI Blast simulators Blast effects Blast scaling Blast-induced motion Van Albert, S. aut Sajja, V. aut Long, J. aut Enthalten in Shock waves Springer Berlin Heidelberg, 1991 28(2017), 1 vom: 23. Okt., Seite 101-114 (DE-627)130966657 (DE-600)1068310-0 (DE-576)025185977 0938-1287 nnns volume:28 year:2017 number:1 day:23 month:10 pages:101-114 https://doi.org/10.1007/s00193-017-0768-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_70 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4277 AR 28 2017 1 23 10 101-114 |
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10.1007/s00193-017-0768-y doi (DE-627)OLC2057900606 (DE-He213)s00193-017-0768-y-p DE-627 ger DE-627 rakwb eng 530 VZ Ritzel, D. V. verfasserin (orcid)0000-0002-9358-3991 aut Acceleration from short-duration blast 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag GmbH Germany (outside the USA) 2017 Abstract The blast-induced motion of spheres has been studied experimentally where the shock wave is rapidly decaying during the period that quasi-steady acceleration would be developed in the case of a step-function shock wave as considered in most shock-tube studies. The motion of sphere models ranging from 39 to 251 mm in diameter and having a range of densities was assessed using the “free-flight” method in a simulator specially designed to replicate the decaying shock wave profile of spherical blast including negative phase and positive entropy gradient. A standardized blast-wave simulation of 125 kPa and 6-ms positive-phase duration was applied for all experiments. In all cases, there are three phases to the motion: a relatively low “kickoff” velocity from the shock diffraction, acceleration or deceleration during the positive duration, then deceleration through the negative phase and subsequent quiescent air. The unexpected deceleration of larger spheres after their kickoff velocity during the decaying yet high-speed flow of the blast wave seems associated with the persistence of a ring vortex on the downstream side of the sphere. The flow is entirely unsteady with initial forces dominated by the shock diffraction; therefore, the early motion of spheres under such conditions is not governed by quasi-steady drag as in classical aerodynamics. The work will help establish scaling rules for model studies of blast-induced motion relevant to improvised explosive devices, and preliminary results are shown for motion imparted to a human skull surrogate. bTBI Blast simulators Blast effects Blast scaling Blast-induced motion Van Albert, S. aut Sajja, V. aut Long, J. aut Enthalten in Shock waves Springer Berlin Heidelberg, 1991 28(2017), 1 vom: 23. Okt., Seite 101-114 (DE-627)130966657 (DE-600)1068310-0 (DE-576)025185977 0938-1287 nnns volume:28 year:2017 number:1 day:23 month:10 pages:101-114 https://doi.org/10.1007/s00193-017-0768-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_70 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4277 AR 28 2017 1 23 10 101-114 |
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10.1007/s00193-017-0768-y doi (DE-627)OLC2057900606 (DE-He213)s00193-017-0768-y-p DE-627 ger DE-627 rakwb eng 530 VZ Ritzel, D. V. verfasserin (orcid)0000-0002-9358-3991 aut Acceleration from short-duration blast 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag GmbH Germany (outside the USA) 2017 Abstract The blast-induced motion of spheres has been studied experimentally where the shock wave is rapidly decaying during the period that quasi-steady acceleration would be developed in the case of a step-function shock wave as considered in most shock-tube studies. The motion of sphere models ranging from 39 to 251 mm in diameter and having a range of densities was assessed using the “free-flight” method in a simulator specially designed to replicate the decaying shock wave profile of spherical blast including negative phase and positive entropy gradient. A standardized blast-wave simulation of 125 kPa and 6-ms positive-phase duration was applied for all experiments. In all cases, there are three phases to the motion: a relatively low “kickoff” velocity from the shock diffraction, acceleration or deceleration during the positive duration, then deceleration through the negative phase and subsequent quiescent air. The unexpected deceleration of larger spheres after their kickoff velocity during the decaying yet high-speed flow of the blast wave seems associated with the persistence of a ring vortex on the downstream side of the sphere. The flow is entirely unsteady with initial forces dominated by the shock diffraction; therefore, the early motion of spheres under such conditions is not governed by quasi-steady drag as in classical aerodynamics. The work will help establish scaling rules for model studies of blast-induced motion relevant to improvised explosive devices, and preliminary results are shown for motion imparted to a human skull surrogate. bTBI Blast simulators Blast effects Blast scaling Blast-induced motion Van Albert, S. aut Sajja, V. aut Long, J. aut Enthalten in Shock waves Springer Berlin Heidelberg, 1991 28(2017), 1 vom: 23. Okt., Seite 101-114 (DE-627)130966657 (DE-600)1068310-0 (DE-576)025185977 0938-1287 nnns volume:28 year:2017 number:1 day:23 month:10 pages:101-114 https://doi.org/10.1007/s00193-017-0768-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_70 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4277 AR 28 2017 1 23 10 101-114 |
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10.1007/s00193-017-0768-y doi (DE-627)OLC2057900606 (DE-He213)s00193-017-0768-y-p DE-627 ger DE-627 rakwb eng 530 VZ Ritzel, D. V. verfasserin (orcid)0000-0002-9358-3991 aut Acceleration from short-duration blast 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag GmbH Germany (outside the USA) 2017 Abstract The blast-induced motion of spheres has been studied experimentally where the shock wave is rapidly decaying during the period that quasi-steady acceleration would be developed in the case of a step-function shock wave as considered in most shock-tube studies. The motion of sphere models ranging from 39 to 251 mm in diameter and having a range of densities was assessed using the “free-flight” method in a simulator specially designed to replicate the decaying shock wave profile of spherical blast including negative phase and positive entropy gradient. A standardized blast-wave simulation of 125 kPa and 6-ms positive-phase duration was applied for all experiments. In all cases, there are three phases to the motion: a relatively low “kickoff” velocity from the shock diffraction, acceleration or deceleration during the positive duration, then deceleration through the negative phase and subsequent quiescent air. The unexpected deceleration of larger spheres after their kickoff velocity during the decaying yet high-speed flow of the blast wave seems associated with the persistence of a ring vortex on the downstream side of the sphere. The flow is entirely unsteady with initial forces dominated by the shock diffraction; therefore, the early motion of spheres under such conditions is not governed by quasi-steady drag as in classical aerodynamics. The work will help establish scaling rules for model studies of blast-induced motion relevant to improvised explosive devices, and preliminary results are shown for motion imparted to a human skull surrogate. bTBI Blast simulators Blast effects Blast scaling Blast-induced motion Van Albert, S. aut Sajja, V. aut Long, J. aut Enthalten in Shock waves Springer Berlin Heidelberg, 1991 28(2017), 1 vom: 23. Okt., Seite 101-114 (DE-627)130966657 (DE-600)1068310-0 (DE-576)025185977 0938-1287 nnns volume:28 year:2017 number:1 day:23 month:10 pages:101-114 https://doi.org/10.1007/s00193-017-0768-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_70 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4277 AR 28 2017 1 23 10 101-114 |
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Ritzel, D. V. Van Albert, S. Sajja, V. Long, J. |
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acceleration from short-duration blast |
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Acceleration from short-duration blast |
| abstract |
Abstract The blast-induced motion of spheres has been studied experimentally where the shock wave is rapidly decaying during the period that quasi-steady acceleration would be developed in the case of a step-function shock wave as considered in most shock-tube studies. The motion of sphere models ranging from 39 to 251 mm in diameter and having a range of densities was assessed using the “free-flight” method in a simulator specially designed to replicate the decaying shock wave profile of spherical blast including negative phase and positive entropy gradient. A standardized blast-wave simulation of 125 kPa and 6-ms positive-phase duration was applied for all experiments. In all cases, there are three phases to the motion: a relatively low “kickoff” velocity from the shock diffraction, acceleration or deceleration during the positive duration, then deceleration through the negative phase and subsequent quiescent air. The unexpected deceleration of larger spheres after their kickoff velocity during the decaying yet high-speed flow of the blast wave seems associated with the persistence of a ring vortex on the downstream side of the sphere. The flow is entirely unsteady with initial forces dominated by the shock diffraction; therefore, the early motion of spheres under such conditions is not governed by quasi-steady drag as in classical aerodynamics. The work will help establish scaling rules for model studies of blast-induced motion relevant to improvised explosive devices, and preliminary results are shown for motion imparted to a human skull surrogate. © Springer-Verlag GmbH Germany (outside the USA) 2017 |
| abstractGer |
Abstract The blast-induced motion of spheres has been studied experimentally where the shock wave is rapidly decaying during the period that quasi-steady acceleration would be developed in the case of a step-function shock wave as considered in most shock-tube studies. The motion of sphere models ranging from 39 to 251 mm in diameter and having a range of densities was assessed using the “free-flight” method in a simulator specially designed to replicate the decaying shock wave profile of spherical blast including negative phase and positive entropy gradient. A standardized blast-wave simulation of 125 kPa and 6-ms positive-phase duration was applied for all experiments. In all cases, there are three phases to the motion: a relatively low “kickoff” velocity from the shock diffraction, acceleration or deceleration during the positive duration, then deceleration through the negative phase and subsequent quiescent air. The unexpected deceleration of larger spheres after their kickoff velocity during the decaying yet high-speed flow of the blast wave seems associated with the persistence of a ring vortex on the downstream side of the sphere. The flow is entirely unsteady with initial forces dominated by the shock diffraction; therefore, the early motion of spheres under such conditions is not governed by quasi-steady drag as in classical aerodynamics. The work will help establish scaling rules for model studies of blast-induced motion relevant to improvised explosive devices, and preliminary results are shown for motion imparted to a human skull surrogate. © Springer-Verlag GmbH Germany (outside the USA) 2017 |
| abstract_unstemmed |
Abstract The blast-induced motion of spheres has been studied experimentally where the shock wave is rapidly decaying during the period that quasi-steady acceleration would be developed in the case of a step-function shock wave as considered in most shock-tube studies. The motion of sphere models ranging from 39 to 251 mm in diameter and having a range of densities was assessed using the “free-flight” method in a simulator specially designed to replicate the decaying shock wave profile of spherical blast including negative phase and positive entropy gradient. A standardized blast-wave simulation of 125 kPa and 6-ms positive-phase duration was applied for all experiments. In all cases, there are three phases to the motion: a relatively low “kickoff” velocity from the shock diffraction, acceleration or deceleration during the positive duration, then deceleration through the negative phase and subsequent quiescent air. The unexpected deceleration of larger spheres after their kickoff velocity during the decaying yet high-speed flow of the blast wave seems associated with the persistence of a ring vortex on the downstream side of the sphere. The flow is entirely unsteady with initial forces dominated by the shock diffraction; therefore, the early motion of spheres under such conditions is not governed by quasi-steady drag as in classical aerodynamics. The work will help establish scaling rules for model studies of blast-induced motion relevant to improvised explosive devices, and preliminary results are shown for motion imparted to a human skull surrogate. © Springer-Verlag GmbH Germany (outside the USA) 2017 |
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