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使用实验方法及数值求解三维Navier-Stokes方程,研究了模拟新月形沙丘的BD型旋涡发生器的后缘涡管气流结构及稳定特性.由于拱形效应及涡管尖端发散而产生的抽气作用,BD型涡管具有顽强的抗干扰性能。实验结果表明,和同样阻塞比的V型槽相比,BD型旋涡发生器的阻力下降75—80％,旋涡火焰的贫油稳定性得到大幅度扩展,并具有良好的点火性能.实验结果印证了作者在文献[1]中提出的提高旋涡稳定性的基本原则。
Using the experimental method and the numerical solution of the three-dimensional Navier-Stokes equations, the trailing vortex flow structure and stability characteristics of a BD vortex generator simulating a crescent-shaped sand dune are studied. The aspiration effect due to the vaulting effect and divergence of the vortex tube tip The role of BD vortex tube has tenacious anti-jamming performance. The experimental results show that compared with the V-groove with the same blocking ratio, the resistance of the BD vortex generator is reduced by 75-80%, the lean stability of the vortex flame is greatly expanded, and the ignition performance is good. The basic principle of improving vortex stability proposed by the author in [1].