文氏效应在叶片根部马蹄涡控制中的应用

为研究文氏管在叶片根部马蹄涡控制作用的应用,针对简化了的叶片-平板结构在叶片上游平板上的某位置开狭缝,在平板的另一侧构造一文氏管（文氏管的喉道位于狭缝处）,引射叶片根部的流体,进而控制马蹄涡.数值模拟了不同狭缝位置的湍流流动;结果表明了改变狭缝相对于叶片的位置能很好地控制马蹄涡,甚至能完全消除叶片前马蹄涡.提出的方法可...

Study on the control of the wing-body juncture horseshoe vortex utilizing Venturi tube

In order to study on the control of the wing-body juncture horseshoe vortex utilizing Venturi tube,a typical wing-body junction region was presented.In order to conduct the control of horseshoe vortex,a wing with a slot placed upstream in the flat plate and a Venturi tube mounted on the other side of the plate was established.Because of the Venturi principle,when the flow passed over the throat,the slot acted as a quality injector.Numerical simulation was conducted to investigate turbulent junction flow with different positions of the slot.The results show that the horseshoe vortex can be controlled well,and furthermore eliminated completely horseshoe vortex,through the modification of the slot position relative to the wing.The proposed method can utilize potential energy,and does not consume any additional power.Therefore,it is a kind of passive control method with a great practical application prospect.The approach of the control of junction flows based on Venturi principle presented in this paper is promising in the engineering application since it is very simple and applicable.