### 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.

Original language | English |
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Pages (from-to) | 375-386 |

Number of pages | 12 |

Journal | Journal of Wind Engineering and Industrial Aerodynamics |

Volume | 14 |

Issue number | 1-3 |

DOIs | |

Publication status | Published - Jan 1 1983 |

Externally published | Yes |

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### All Science Journal Classification (ASJC) codes

- Fluid Flow and Transfer Processes
- Aerospace Engineering
- Building and Construction

### Cite this

**Free-stream turbulence effects on a separation bubble.** / Kiya, Masaru; Sasaki, Kyuro.

Research output: Contribution to journal › Article

*Journal of Wind Engineering and Industrial Aerodynamics*, vol. 14, no. 1-3, pp. 375-386. https://doi.org/10.1016/0167-6105(83)90039-9

}

TY - JOUR

T1 - Free-stream turbulence effects on a separation bubble

AU - Kiya, Masaru

AU - Sasaki, Kyuro

PY - 1983/1/1

Y1 - 1983/1/1

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

VL - 14

SP - 375

EP - 386

JO - Journal of Industrial Aerodynamics

JF - Journal of Industrial Aerodynamics

SN - 0167-6105

IS - 1-3

ER -