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稳态气体射流,作为一种典型流体力学现象和重要的工程应用技术,已在实验上和理论上广泛而深入地作过研究,得出了经典性的结果。但对间歇性的瞬态射流或射流开始发展的过渡阶段,尤其是这种射流和壁面的相互作用,迄今还研究很少。不过在某些领域,如内燃机工程中,这种研究有着重要的实际意义。气体射流模型曾用来模拟柴油机中高喷射压力的喷雾,获得相当的成功。而高喷射压力天然气发动机则更需要直接应用瞬态气体射流技术。
Steady-state gas jets, as a typical phenomenon of fluid mechanics and important engineering application technology, have been studied experimentally and theoretically extensively and deeply, and the classical results have been obtained. However, to the transient transient jet or the transitional phase where the jet begins to develop, especially the interaction between this jet and the wall has not been studied yet. However, in some areas, such as internal combustion engine engineering, this research has important practical significance. The gas jet model was used to simulate the high injection pressure of diesel spray, with considerable success. However, high injection pressure natural gas engines need more direct application of transient gas jet technology.