TY - JOUR
T1 - Free-stream turbulence effects on a separation bubble
AU - Kiya, Masaru
AU - Sasaki, Kyuro
N1 - Funding Information:
The present study was supported by the Grant-in-Aid for Scientific Research from the Ministry of Education, Science and Culture of Japan and also by Hatakeyama Foundation. The authors are grateful to Dr. J. C. R. Hunt for bis helpful discussions which led to Eq. (3).
PY - 1983/12
Y1 - 1983/12
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0020971230&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0020971230&partnerID=8YFLogxK
U2 - 10.1016/0167-6105(83)90039-9
DO - 10.1016/0167-6105(83)90039-9
M3 - Article
AN - SCOPUS:0020971230
SN - 0167-6105
VL - 14
SP - 375
EP - 386
JO - Journal of Wind Engineering and Industrial Aerodynamics
JF - Journal of Wind Engineering and Industrial Aerodynamics
IS - 1-3
ER -