An Experimental Study of the Structure of an Impinging Coaxial Jet: Research Initiation Award

将研究射流冲击刚性表面的问题，其目的是： 减轻了在这种情况下可能发生的谐振效应。 两 将对亚音速和超音速条件进行研究 实验性的 重点是同轴圆形射流， 相信这种配置很可能提供减少 在不利的压力波动。 已经观察到这种减少 在自由同轴射流中，它们的地面冲击还没有被 以前探索过。 适用于垂直短距起落飞机，特别是超音速飞机。 操作

A jet impinging on a rigid surface will be studied with the aim of alleviating resonance effects which can occur in this situation. Both subsonic and supersonic conditions will be investigated experimentally. The focus is to be on co-axial circular jets, in the belief that this configuration is highly likely to provide reduction in adverse pressure fluctuations. Such reductions have been observed in free co-axial jets, and their ground impingement has not been previously explored. Application is to VSTOL aircraft, particularly to supersonic operation.