Free-stream turbulence effects on a separation bubble
Effects of free-stream turbulence on a separation bubble formed along a side of a blunt plate with right-angled corners are studied. The free-stream turbulence was generated by a thin circular rod which was placed at a certain distance upstream of the plate along its stagnation streamline. Various c...
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| Published in | Journal of wind engineering and industrial aerodynamics Vol. 14; no. 1; pp. 375 - 386 |
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| Main Authors | , |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier Ltd
01.01.1983
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| Online Access | Get full text |
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| Abstract | Effects of free-stream turbulence on a separation bubble formed along a side of a blunt plate with right-angled corners are studied. The free-stream turbulence was generated by a thin circular rod which was placed at a certain distance upstream of the plate along its stagnation streamline. Various characteristic parameters of the separation bubble such as the bubble length, the integral length scale of large-scale vortices, the maximum pressure difference in the bubble, a few characteristics lengths of the time-mean pressure profile etc. are fairly well correlated with the turbulence intensity just outside the separated shear layer near the edge. The turbulence length scale there was a fairly unique function of the turbulence intensity. Statistical properties of the fluctuating surface pressure are also studied and used to demonstrate the large-scale vortices in the reattaching zone. The maximum r.m.s. surface pressure was found to be estimated in terms of the longitudinal gradient of the time-mean pressure and the length scale of vortices in the reattaching zone. |
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| AbstractList | Effects of free-stream turbulence on a separation bubble formed along a side of a blunt plate with right-angled corners are studied. The free-stream turbulence was generated by a thin circular rod which was placed at a certain distance upstream of the plate along its stagnation streamline. Various characteristic parameters of the separation bubble such as the bubble length, the integral length scale of large-scale vortices, the maximum pressure difference in the bubble, a few characteristics lengths of the time-mean pressure profile etc. are fairly well correlated with the turbulence intensity just outside the separated shear layer near the edge. The turbulence length scale there was a fairly unique function of the turbulence intensity. Statistical properties of the fluctuating surface pressure are also studied and used to demonstrate the large-scale vortices in the reattaching zone. The maximum r.m.s. surface pressure was found to be estimated in terms of the longitudinal gradient of the time-mean pressure and the length scale of vortices in the reattaching zone. |
| Author | Sasaki, K. Kiya, M. |
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| Cites_doi | 10.1016/0167-6105(81)90007-6 10.1017/S0022112073000893 10.1115/1.3448712 10.1016/0004-6981(75)90088-8 10.1016/0167-6105(78)90019-3 10.1017/S0022112079000628 |
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| References | Hillier, Cherry (BIB1) 1981; 8 Wedding, Robertson, Peterka, Akins (BIB2) 1978; 100 Hunt (BIB5) 1973; 61 Robertson, Wedding, Peterka, Cermak (BIB3) 19/7//978; 2 Gartshore (BIB4) 1973 Britter, Hunt, Mumford (BIB6) 1979; 92 Counihan (BIB7) 1975; 9 Wedding (10.1016/0167-6105(83)90039-9_BIB2) 1978; 100 Hillier (10.1016/0167-6105(83)90039-9_BIB1) 1981; 8 Gartshore (10.1016/0167-6105(83)90039-9_BIB4) 1973 Counihan (10.1016/0167-6105(83)90039-9_BIB7) 1975; 9 Robertson (10.1016/0167-6105(83)90039-9_BIB3); 2 Britter (10.1016/0167-6105(83)90039-9_BIB6) 1979; 92 Hunt (10.1016/0167-6105(83)90039-9_BIB5) 1973; 61 |
| References_xml | – year: 1973 ident: BIB4 article-title: The Effects of Free-Stream Turbulence on the Drag of Rectangular Two-Dimensional Prisms publication-title: The University of Western Ontario BLWT-4-73 contributor: fullname: Gartshore – volume: 100 start-page: 485 year: 1978 end-page: 492 ident: BIB2 article-title: Spectral and Probability-Density Nature of Square-Prism Separation-Reattachment Wall Pressures, Transactions of the ASME publication-title: Journal of Fluids Engineering contributor: fullname: Akins – volume: 61 start-page: 625 year: 1973 end-page: 706 ident: BIB5 article-title: A Theory of Turbulent Flow Round Two-Dimensional Bluff Bodies publication-title: Journal of Fluid Mechanics contributor: fullname: Hunt – volume: 8 start-page: 49 year: 1981 end-page: 58 ident: BIB1 article-title: The Effects of Stream Turbulence on Separation Bubbles publication-title: Journal of Wind Engineering and Industrial Aerodynamics contributor: fullname: Cherry – volume: 92 start-page: 269 year: 1979 end-page: 301 ident: BIB6 article-title: The Distortion of Turbulence by a Circular Cylinder publication-title: Journal of Fluid Mechanics contributor: fullname: Mumford – volume: 9 start-page: 871 year: 1975 end-page: 905 ident: BIB7 article-title: Adiabatic Atmospheric Boundary Layers: A Review and Analysis of Data from the Period 1880–1972 publication-title: Atmospheric Environment contributor: fullname: Counihan – volume: 2 start-page: 345 year: 19/7//978 end-page: 359 ident: BIB3 article-title: Wall Pressures of Separation-Reattachment Flow on a Square Prism in Uniform Flow publication-title: Journal of Wind Engineering and Industrial Aerodynamics contributor: fullname: Cermak – volume: 8 start-page: 49 year: 1981 ident: 10.1016/0167-6105(83)90039-9_BIB1 article-title: The Effects of Stream Turbulence on Separation Bubbles publication-title: Journal of Wind Engineering and Industrial Aerodynamics doi: 10.1016/0167-6105(81)90007-6 contributor: fullname: Hillier – volume: 61 start-page: 625 year: 1973 ident: 10.1016/0167-6105(83)90039-9_BIB5 article-title: A Theory of Turbulent Flow Round Two-Dimensional Bluff Bodies publication-title: Journal of Fluid Mechanics doi: 10.1017/S0022112073000893 contributor: fullname: Hunt – volume: 100 start-page: 485 year: 1978 ident: 10.1016/0167-6105(83)90039-9_BIB2 article-title: Spectral and Probability-Density Nature of Square-Prism Separation-Reattachment Wall Pressures, Transactions of the ASME publication-title: Journal of Fluids Engineering doi: 10.1115/1.3448712 contributor: fullname: Wedding – volume: 9 start-page: 871 year: 1975 ident: 10.1016/0167-6105(83)90039-9_BIB7 article-title: Adiabatic Atmospheric Boundary Layers: A Review and Analysis of Data from the Period 1880–1972 publication-title: Atmospheric Environment doi: 10.1016/0004-6981(75)90088-8 contributor: fullname: Counihan – year: 1973 ident: 10.1016/0167-6105(83)90039-9_BIB4 article-title: The Effects of Free-Stream Turbulence on the Drag of Rectangular Two-Dimensional Prisms publication-title: The University of Western Ontario BLWT-4-73 contributor: fullname: Gartshore – volume: 2 start-page: 345 ident: 10.1016/0167-6105(83)90039-9_BIB3 article-title: Wall Pressures of Separation-Reattachment Flow on a Square Prism in Uniform Flow publication-title: Journal of Wind Engineering and Industrial Aerodynamics doi: 10.1016/0167-6105(78)90019-3 contributor: fullname: Robertson – volume: 92 start-page: 269 year: 1979 ident: 10.1016/0167-6105(83)90039-9_BIB6 article-title: The Distortion of Turbulence by a Circular Cylinder publication-title: Journal of Fluid Mechanics doi: 10.1017/S0022112079000628 contributor: fullname: Britter |
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