为明确超声速混合层发展规律,利用混合LES/RANS方法计算了隔板厚度、压力不匹配程度及燃料组分对超声速混合层发展的影响,并定量分析了相应的混合效率和压力损失。结果表明:一定范围内,隔板厚度越大,混合越好,总压损失越大;压力不匹配程度与混合效率和压力损失并非线性关系,总体而言,不匹配程度越高,混合效率相对较高,总压损失较小;氢气组分越靠近当量质量分数,混合效率越高,压力损失较大。

In order to determine the discipline of the development of the supersonic mixing layer, the hybrid LES/RANS method was applied to simulate the influence of the clapboard thickness, the pressure mismatch degree and fuel components. Besides, the corresponding mixing efficiency and the total-pressure loss were analyzed. The results suggest that within a certain range, the thicker the clapboard is, the higher the mixing efficiency and the total-pressure loss are; the pressure mismatch degree is nonlinear to the mixing efficiency and the total-pressure loss. In general, the higher the pressure mismatch degree is, the higher the mixing efficiency is and the lower the total-pressure loss is; the nearer the hydrogen is to the equivalent mass fraction, the higher the mixing efficiency and the total-pressure loss are.