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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.提出的方法可以利用外势流的能量而无需额外消耗能量,为一种被动的控制手段,有很大的实际应用前景.利用文氏效应的控制方法简单实用,因此工程中采用该法是不错的一种选择.
In order to study the application of Venturi tube in the control of the horseshoe vortex at the blade root, a simplified vent-plate structure was opened at a position on the upstream plate of the blade, and a venturi tube was constructed on the other side of the plate The throat is located at the slit, and the fluid at the root of the blade is introduced to control the horseshoe vortex. The turbulent flow at different slit positions is numerically simulated. The results show that controlling the position of the slit relative to the blade can control the horseshoe vortex well, Even before the blade can completely eliminate the horseshoe vortex.The proposed method can use the energy of the external potential flow without additional energy consumption as a passive control means has great practical application prospects.Using the Venturi effect of the control method is simple and practical Therefore, it is a good choice to adopt this method in engineering.