Adaptive Separation Control System Using Vortex Generator Jets for Time-Varying Flow
Publish place: Journal of Applied Fluid Mechanics، Vol: 1، Issue: 2
Publish Year: 1391
نوع سند: مقاله ژورنالی
زبان: English
View: 73
نسخه کامل این Paper ارائه نشده است و در دسترس نمی باشد
- Certificate
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_JAFM-1-2_008
تاریخ نمایه سازی: 8 دی 1400
Abstract:
Flow separation is mostly an undesirable phenomenon and boundary layer control is an important technique for flow separation problems on airfoils and in diffusers. Longitudinal (streamwise) vortices are produced by the interaction between jets and a freestream. This technique is known as the vortex generator jet method of separation, or stall control. The vortex generator jet method is an active control technique that provides a time-varying control action to optimize performance under a wide range of flow conditions because the strength of longitudinal vortices can be adjusted by varying the jet speed. In the present study, an active separation control system using vortex generator jets with rectangular orifices has been developed. The active separation control system can be practically applied to the flow separation control of a two-dimensional diffuser. It was confirmed that the proposed active separation control system could adaptively suppress flow separation for the flow fields caused by some changes in freestream velocity and the divergence angle of the diffuser.
Keywords:
Authors
H. Hasegawa
Department of Mechanical Engineering Akita University, Akita, Akita, ۰۱۰-۸۵۰۲, Japan
S. Kumagai
Graduate School of Engineering & Resource Science Akita University, Akita, Akita, ۰۱۰-۸۵۰۲, Japan