Measurement of unsteady shock standoff distance around spheres flying at Mach numbers near one
Abstract This paper reports the experiments on the shock standoff distance (SSD) around spheres flying at Mach numbers from slightly below 1.0. Spheres of the same diameter but three different densities were launched in a ballistic range by a light-gas gun, and the flow field around each sphere was...
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| Autor*in: |
Kikuchi, T. [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2022 |
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| Schlagwörter: |
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| Anmerkung: |
© The Author(s) 2022. corrected publication 2022 |
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| Übergeordnetes Werk: |
Enthalten in: Shock waves - Springer Berlin Heidelberg, 1991, 32(2022), 2 vom: 24. Jan., Seite 235-239 |
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| Übergeordnetes Werk: |
volume:32 ; year:2022 ; number:2 ; day:24 ; month:01 ; pages:235-239 |
| Links: |
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| DOI / URN: |
10.1007/s00193-021-01067-x |
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OLC2078384062 |
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| 520 | |a Abstract This paper reports the experiments on the shock standoff distance (SSD) around spheres flying at Mach numbers from slightly below 1.0. Spheres of the same diameter but three different densities were launched in a ballistic range by a light-gas gun, and the flow field around each sphere was measured by optical visualization. The purpose of this study is to investigate how projectile deceleration influences the SSD by comparing the results for projectiles of the same shape, size, and Mach number but different densities. The location history of the sphere center is obtained by fitting a formula derived from the equation of motion of a decelerating object, and the history of the instantaneous projectile Mach number is obtained by differentiating this formula.The SSDs of the projectiles with different densities are the same at higher Mach numbers, but different at lower Mach numbers, and the SSD decreases with decreasing projectile density. Seemingly, because projectile deceleration is related to the flow unsteadiness, steady flow cannot be assumed in the present range of Mach number with the different SSDs. At Mach numbers close to one, that of the propagating detached shock wave is higher than that of the flying projectile. | ||
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10.1007/s00193-021-01067-x doi (DE-627)OLC2078384062 (DE-He213)s00193-021-01067-x-p DE-627 ger DE-627 rakwb eng 530 VZ Kikuchi, T. verfasserin (orcid)0000-0001-5931-4790 aut Measurement of unsteady shock standoff distance around spheres flying at Mach numbers near one 2022 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s) 2022. corrected publication 2022 Abstract This paper reports the experiments on the shock standoff distance (SSD) around spheres flying at Mach numbers from slightly below 1.0. Spheres of the same diameter but three different densities were launched in a ballistic range by a light-gas gun, and the flow field around each sphere was measured by optical visualization. The purpose of this study is to investigate how projectile deceleration influences the SSD by comparing the results for projectiles of the same shape, size, and Mach number but different densities. The location history of the sphere center is obtained by fitting a formula derived from the equation of motion of a decelerating object, and the history of the instantaneous projectile Mach number is obtained by differentiating this formula.The SSDs of the projectiles with different densities are the same at higher Mach numbers, but different at lower Mach numbers, and the SSD decreases with decreasing projectile density. Seemingly, because projectile deceleration is related to the flow unsteadiness, steady flow cannot be assumed in the present range of Mach number with the different SSDs. At Mach numbers close to one, that of the propagating detached shock wave is higher than that of the flying projectile. Shock standoff distance Near-sonic Unsteady flow Ballistic range Visualization Ohtani, K. (orcid)0000-0002-2806-2022 aut Enthalten in Shock waves Springer Berlin Heidelberg, 1991 32(2022), 2 vom: 24. Jan., Seite 235-239 (DE-627)130966657 (DE-600)1068310-0 (DE-576)025185977 0938-1287 nnns volume:32 year:2022 number:2 day:24 month:01 pages:235-239 https://doi.org/10.1007/s00193-021-01067-x lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4277 AR 32 2022 2 24 01 235-239 |
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10.1007/s00193-021-01067-x doi (DE-627)OLC2078384062 (DE-He213)s00193-021-01067-x-p DE-627 ger DE-627 rakwb eng 530 VZ Kikuchi, T. verfasserin (orcid)0000-0001-5931-4790 aut Measurement of unsteady shock standoff distance around spheres flying at Mach numbers near one 2022 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s) 2022. corrected publication 2022 Abstract This paper reports the experiments on the shock standoff distance (SSD) around spheres flying at Mach numbers from slightly below 1.0. Spheres of the same diameter but three different densities were launched in a ballistic range by a light-gas gun, and the flow field around each sphere was measured by optical visualization. The purpose of this study is to investigate how projectile deceleration influences the SSD by comparing the results for projectiles of the same shape, size, and Mach number but different densities. The location history of the sphere center is obtained by fitting a formula derived from the equation of motion of a decelerating object, and the history of the instantaneous projectile Mach number is obtained by differentiating this formula.The SSDs of the projectiles with different densities are the same at higher Mach numbers, but different at lower Mach numbers, and the SSD decreases with decreasing projectile density. Seemingly, because projectile deceleration is related to the flow unsteadiness, steady flow cannot be assumed in the present range of Mach number with the different SSDs. At Mach numbers close to one, that of the propagating detached shock wave is higher than that of the flying projectile. Shock standoff distance Near-sonic Unsteady flow Ballistic range Visualization Ohtani, K. (orcid)0000-0002-2806-2022 aut Enthalten in Shock waves Springer Berlin Heidelberg, 1991 32(2022), 2 vom: 24. Jan., Seite 235-239 (DE-627)130966657 (DE-600)1068310-0 (DE-576)025185977 0938-1287 nnns volume:32 year:2022 number:2 day:24 month:01 pages:235-239 https://doi.org/10.1007/s00193-021-01067-x lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4277 AR 32 2022 2 24 01 235-239 |
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10.1007/s00193-021-01067-x doi (DE-627)OLC2078384062 (DE-He213)s00193-021-01067-x-p DE-627 ger DE-627 rakwb eng 530 VZ Kikuchi, T. verfasserin (orcid)0000-0001-5931-4790 aut Measurement of unsteady shock standoff distance around spheres flying at Mach numbers near one 2022 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s) 2022. corrected publication 2022 Abstract This paper reports the experiments on the shock standoff distance (SSD) around spheres flying at Mach numbers from slightly below 1.0. Spheres of the same diameter but three different densities were launched in a ballistic range by a light-gas gun, and the flow field around each sphere was measured by optical visualization. The purpose of this study is to investigate how projectile deceleration influences the SSD by comparing the results for projectiles of the same shape, size, and Mach number but different densities. The location history of the sphere center is obtained by fitting a formula derived from the equation of motion of a decelerating object, and the history of the instantaneous projectile Mach number is obtained by differentiating this formula.The SSDs of the projectiles with different densities are the same at higher Mach numbers, but different at lower Mach numbers, and the SSD decreases with decreasing projectile density. Seemingly, because projectile deceleration is related to the flow unsteadiness, steady flow cannot be assumed in the present range of Mach number with the different SSDs. At Mach numbers close to one, that of the propagating detached shock wave is higher than that of the flying projectile. Shock standoff distance Near-sonic Unsteady flow Ballistic range Visualization Ohtani, K. (orcid)0000-0002-2806-2022 aut Enthalten in Shock waves Springer Berlin Heidelberg, 1991 32(2022), 2 vom: 24. Jan., Seite 235-239 (DE-627)130966657 (DE-600)1068310-0 (DE-576)025185977 0938-1287 nnns volume:32 year:2022 number:2 day:24 month:01 pages:235-239 https://doi.org/10.1007/s00193-021-01067-x lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4277 AR 32 2022 2 24 01 235-239 |
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10.1007/s00193-021-01067-x doi (DE-627)OLC2078384062 (DE-He213)s00193-021-01067-x-p DE-627 ger DE-627 rakwb eng 530 VZ Kikuchi, T. verfasserin (orcid)0000-0001-5931-4790 aut Measurement of unsteady shock standoff distance around spheres flying at Mach numbers near one 2022 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s) 2022. corrected publication 2022 Abstract This paper reports the experiments on the shock standoff distance (SSD) around spheres flying at Mach numbers from slightly below 1.0. Spheres of the same diameter but three different densities were launched in a ballistic range by a light-gas gun, and the flow field around each sphere was measured by optical visualization. The purpose of this study is to investigate how projectile deceleration influences the SSD by comparing the results for projectiles of the same shape, size, and Mach number but different densities. The location history of the sphere center is obtained by fitting a formula derived from the equation of motion of a decelerating object, and the history of the instantaneous projectile Mach number is obtained by differentiating this formula.The SSDs of the projectiles with different densities are the same at higher Mach numbers, but different at lower Mach numbers, and the SSD decreases with decreasing projectile density. Seemingly, because projectile deceleration is related to the flow unsteadiness, steady flow cannot be assumed in the present range of Mach number with the different SSDs. At Mach numbers close to one, that of the propagating detached shock wave is higher than that of the flying projectile. Shock standoff distance Near-sonic Unsteady flow Ballistic range Visualization Ohtani, K. (orcid)0000-0002-2806-2022 aut Enthalten in Shock waves Springer Berlin Heidelberg, 1991 32(2022), 2 vom: 24. Jan., Seite 235-239 (DE-627)130966657 (DE-600)1068310-0 (DE-576)025185977 0938-1287 nnns volume:32 year:2022 number:2 day:24 month:01 pages:235-239 https://doi.org/10.1007/s00193-021-01067-x lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4277 AR 32 2022 2 24 01 235-239 |
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10.1007/s00193-021-01067-x doi (DE-627)OLC2078384062 (DE-He213)s00193-021-01067-x-p DE-627 ger DE-627 rakwb eng 530 VZ Kikuchi, T. verfasserin (orcid)0000-0001-5931-4790 aut Measurement of unsteady shock standoff distance around spheres flying at Mach numbers near one 2022 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s) 2022. corrected publication 2022 Abstract This paper reports the experiments on the shock standoff distance (SSD) around spheres flying at Mach numbers from slightly below 1.0. Spheres of the same diameter but three different densities were launched in a ballistic range by a light-gas gun, and the flow field around each sphere was measured by optical visualization. The purpose of this study is to investigate how projectile deceleration influences the SSD by comparing the results for projectiles of the same shape, size, and Mach number but different densities. The location history of the sphere center is obtained by fitting a formula derived from the equation of motion of a decelerating object, and the history of the instantaneous projectile Mach number is obtained by differentiating this formula.The SSDs of the projectiles with different densities are the same at higher Mach numbers, but different at lower Mach numbers, and the SSD decreases with decreasing projectile density. Seemingly, because projectile deceleration is related to the flow unsteadiness, steady flow cannot be assumed in the present range of Mach number with the different SSDs. At Mach numbers close to one, that of the propagating detached shock wave is higher than that of the flying projectile. Shock standoff distance Near-sonic Unsteady flow Ballistic range Visualization Ohtani, K. (orcid)0000-0002-2806-2022 aut Enthalten in Shock waves Springer Berlin Heidelberg, 1991 32(2022), 2 vom: 24. Jan., Seite 235-239 (DE-627)130966657 (DE-600)1068310-0 (DE-576)025185977 0938-1287 nnns volume:32 year:2022 number:2 day:24 month:01 pages:235-239 https://doi.org/10.1007/s00193-021-01067-x lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4277 AR 32 2022 2 24 01 235-239 |
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Measurement of unsteady shock standoff distance around spheres flying at Mach numbers near one |
| abstract |
Abstract This paper reports the experiments on the shock standoff distance (SSD) around spheres flying at Mach numbers from slightly below 1.0. Spheres of the same diameter but three different densities were launched in a ballistic range by a light-gas gun, and the flow field around each sphere was measured by optical visualization. The purpose of this study is to investigate how projectile deceleration influences the SSD by comparing the results for projectiles of the same shape, size, and Mach number but different densities. The location history of the sphere center is obtained by fitting a formula derived from the equation of motion of a decelerating object, and the history of the instantaneous projectile Mach number is obtained by differentiating this formula.The SSDs of the projectiles with different densities are the same at higher Mach numbers, but different at lower Mach numbers, and the SSD decreases with decreasing projectile density. Seemingly, because projectile deceleration is related to the flow unsteadiness, steady flow cannot be assumed in the present range of Mach number with the different SSDs. At Mach numbers close to one, that of the propagating detached shock wave is higher than that of the flying projectile. © The Author(s) 2022. corrected publication 2022 |
| abstractGer |
Abstract This paper reports the experiments on the shock standoff distance (SSD) around spheres flying at Mach numbers from slightly below 1.0. Spheres of the same diameter but three different densities were launched in a ballistic range by a light-gas gun, and the flow field around each sphere was measured by optical visualization. The purpose of this study is to investigate how projectile deceleration influences the SSD by comparing the results for projectiles of the same shape, size, and Mach number but different densities. The location history of the sphere center is obtained by fitting a formula derived from the equation of motion of a decelerating object, and the history of the instantaneous projectile Mach number is obtained by differentiating this formula.The SSDs of the projectiles with different densities are the same at higher Mach numbers, but different at lower Mach numbers, and the SSD decreases with decreasing projectile density. Seemingly, because projectile deceleration is related to the flow unsteadiness, steady flow cannot be assumed in the present range of Mach number with the different SSDs. At Mach numbers close to one, that of the propagating detached shock wave is higher than that of the flying projectile. © The Author(s) 2022. corrected publication 2022 |
| abstract_unstemmed |
Abstract This paper reports the experiments on the shock standoff distance (SSD) around spheres flying at Mach numbers from slightly below 1.0. Spheres of the same diameter but three different densities were launched in a ballistic range by a light-gas gun, and the flow field around each sphere was measured by optical visualization. The purpose of this study is to investigate how projectile deceleration influences the SSD by comparing the results for projectiles of the same shape, size, and Mach number but different densities. The location history of the sphere center is obtained by fitting a formula derived from the equation of motion of a decelerating object, and the history of the instantaneous projectile Mach number is obtained by differentiating this formula.The SSDs of the projectiles with different densities are the same at higher Mach numbers, but different at lower Mach numbers, and the SSD decreases with decreasing projectile density. Seemingly, because projectile deceleration is related to the flow unsteadiness, steady flow cannot be assumed in the present range of Mach number with the different SSDs. At Mach numbers close to one, that of the propagating detached shock wave is higher than that of the flying projectile. © The Author(s) 2022. corrected publication 2022 |
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| title_short |
Measurement of unsteady shock standoff distance around spheres flying at Mach numbers near one |
| url |
https://doi.org/10.1007/s00193-021-01067-x |
| remote_bool |
false |
| author2 |
Ohtani, K. |
| author2Str |
Ohtani, K. |
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130966657 |
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| doi_str |
10.1007/s00193-021-01067-x |
| up_date |
2024-07-03T20:11:08.572Z |
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7.39896 |