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首页> 外文期刊>Journal of aerospace engineering >Energy Addition-Based Virtual Cowl for Performance Enhancement of Scramjet Intake
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Energy Addition-Based Virtual Cowl for Performance Enhancement of Scramjet Intake

机译：基于能量加成的虚拟风帽，可提高超燃冲压发动机进气口的性能

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摘要

Energy addition has been considered a means to improve the performance of supersonic inlets. The energy addition to supersonic inlets can be considered as a virtual cowl, which can be implemented during off-design conditions to essentially emulate the shock-on-lip (SOL) condition obtained at the design point. The primary purpose of this work is to increase the mass capture and the pressure recovery and reduce flow distortion at the exit of the isolator section by finding the optimum location and energy required to enhance the performance of the intake section. Parameters like magnitude and location of energy addition were examined. The performance was assessed using mass capture, total pressure recovery, static-pressure rise, and flow distortion. The effects of shock reflections at the exit and the shifting of separation zones due to energy addition have also been understood and discussed. An energy addition of 0.2 MW/m was found to be most suitable at a region that is near the cowl leading edge. Moving below or far above the cowl line was found to decrease the performance. The improvement in mass capture with suitable parameters can be up to 15%. (c) 2019 American Society of Civil Engineers.
机译：能量增加已被认为是改善超音速进气口性能的一种手段。可以将超音速进气口的能量添加视为虚拟整流罩，可以在非设计条件下实施该仿真罩，以实质上模拟在设计点获得的唇部冲击（SOL）条件。这项工作的主要目的是通过找到增强进气段性能所需的最佳位置和能量来增加质量捕获量和压力回收率，并减少隔离段出口处的流量畸变。检查了诸如能量添加量的大小和位置之类的参数。使用质量捕获，总压力恢复，静压上升和流量畸变来评估性能。还已经理解和讨论了出口处冲击反射的影响以及由于能量增加而引起的分离区移动。发现在前围前缘附近的区域最适合添加0.2 MW / m的能量。发现在前围线以下或远高于前围线会降低性能。使用合适的参数进行质量捕获的改进最多可以达到15％。 （c）2019美国土木工程师学会。

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