二元空气进口结构参数对固冲补燃室掺混燃烧性能的影响

Effects of Configuration Parameters of Quadrilateral Air Entry on the Mixing and Combustion Performance of Afterburning Chamber

采用试验设计方法,基于双侧水平二元空气进气布局固冲发动机,针对固冲补燃室空气进口长宽比和空气进气面积这两种因素对固冲补燃室掺混燃烧性能的影响进行仿真分析。结果表明:空气进口长宽比和进气面积对补燃室掺混燃烧性能的影响较大,且在特定水平下两因素对补燃室掺混燃烧性能的影响存在交互作用;随着空气进口长宽比的增大,补燃室温升效率呈先基本恒定、然后减小、再增大的趋势,而补燃室总压恢复系数均呈减小的趋势;当空气进口长宽比大于1.000时,空气进气面积较小时补燃室温升效率相对较高;相同空气进口长宽比时,空气进气面积较小时的补燃室总压恢复系数均相对较高。

Using the method of width ratio and area of quadrilateral chamber which belongs to a solid du effects of length-width ratio and area chamber are great, and the two facto experimental design, the simulation analysis of the effects of lengthair entry on the mixing and combustion performance of afterburning cted rocket with two flanks inlets is done. The results show that the of air entry on the mixing and combustion performance of afterburning rs have interaction eft）cts on the performance of afterburning chamber in some parameter levels. With the increase of length-width ratio of air entry, the temperature rise efficiency of afterbuning chamber is constant at first, then turns down, and enhances again at last, but the total pressure recovery coefficient of afterburning chamber is decreased. When the length-width ratio of air entry is greater than 1. 000, and the air entry area is small , the temperature rise efficiency of afterburning chamber is relatively high. With the same length-width ratio, the total pressure recorery coefficient of afterburning chamber with the smaller area of air entry is relatively higher.