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首页> 外文期刊>Institution of engineers journal (Inida) >Unstart Suppression and Performance Analysis of Supersonic Air-intake Adopting Bleed and Cowl Bending
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Unstart Suppression and Performance Analysis of Supersonic Air-intake Adopting Bleed and Cowl Bending

机译：采用排气和罩弯曲的超音速进气的起步抑制和性能分析

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摘要

Two-dimensional numerical simulations and experiments are performed to obtain the flow field characteristics of a mixed compression air-intake at supersonic speed. Simulation with inviscid normal flow indicated start of intake, whereas, simulation with turbulent flow and experiments indicated unstart of intake. Implementation of bleed or cowl bending was found necessary for the start of intake. The effect of combining bleed and cowl bending is studied with free exit flow and as well as with pressurised exit conditions. Experiments adopting Schlieren and oil flow visualisation and measurement of static and total pressures were obtained for bent cowl only. All simulations have been made adopting k-ω turbulence model using fluent. A good agreement between experiments and computations has been established. Results show a definite improvement in flow quality and performance with adoption of both bleed and cowl bending and hence could be utilised to alleviate starting problems of intake and also to improve the performance.
机译：进行了二维数值模拟和实验，以获得超音速混合压缩进气的流场特性。用不粘稠的正常流量进行模拟表示进气开始，而用湍流和实验进行的模拟表示进气未开始。发现开始进气需要执行排气或前围弯曲。在自由出口流量和加压出口条件下，研究了放气与前围弯曲结合的效果。仅通过弯曲整流罩进行了采用Schlieren和油流可视化以及静态和总压力测量的实验。所有仿真均采用流利的k-ω湍流模型进行。实验与计算之间已经建立了良好的协议。结果表明，通过采用放气和前围板弯曲，流量质量和性能得到了明显改善，因此可用于缓解进气的起始问题并改善性能。

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