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首页> 外文会议>National Fluid Mechanics and Fluid Power Conference >FLOW CONTROL IN Y-SHAPED AIR-INTAKES USING VORTEX GENERATORS
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FLOW CONTROL IN Y-SHAPED AIR-INTAKES USING VORTEX GENERATORS

机译：使用涡流发生器的Y形空气摄入量的流量控制

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摘要

Aircraft propulsion systems often use Y-shaped subsonic diffusing ducts as air-intakes to supply the ambient air into the engine compressor for thrust generation. Due to space constraint, the diffusers need to be curved, which causes severe flow nonuniformity at the engine face. The present study attempt to control flow in a mild-curved Y-duct diffuser using trapezoidal-shaped submerged vortex generators (SVG) attached on both the sides of the diffuser at the inflexion plane. CFD code 'Fluent 6.3' is modified and used to simulate the effects of SVG in flow of Y-duct diffuser. Experiments are conducted with bare duct (i.e., duct without SVG) for CFD code validation. The best combination of Y-duct diffuser is found with SVG-2 arranged in corotating sequence, which ensures highest static pressure recovery, lowest total pressure loss, minimum flow distortion and less flow separation in Y-duct diffuser. The increase of SVG height and angle helps in injecting larger vortices into the decelerating boundary layer. The correct orientation ensures better uniformity of the flow, especially at the diffuser outlet.
机译：飞机推进系统通常使用Y形亚音速漫射管作为进气口，以将环境空气供应到发动机压缩机中以用于推力。由于空间约束，漫射器需要弯曲，这导致发动机面上的严重流动不均匀性。本研究试图使用梯形浸没式涡流发生器（SVG）在Inflexion平面处安装在扩散器的两侧上的梯形浸没的涡流发生器（SVG）来控制温和弯曲的Y型扩散器的流动。 CFD代码的流利的6.3'被修改并用于模拟SVG在Y型扩散器流动中的影响。实验用裸露的管道（即，没有SVG）进行CFD代码验证。 Y型导管扩散器的最佳组合在COROTATE序列中布置有SVG-2，其确保最高静态压力回收，最低总压力损失，最小流动变形以及Y导管扩散器的流量分离。 SVG高度和角度的增加有助于将较大的涡流注入减速边界层。正确的取向确保了流动的更好均匀性，特别是在扩散器出口处。

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