微引射热气除冰腔引射性能分析

Injection Performance of Hot-Air De-icer with Micro-Injector

为了提高飞机热气除冰系统的性能,介绍了飞机微引射热气除冰腔的工作原理,应用FLUENT软件对7种不同结构的微引射热气除冰腔的引射性能进行了数值模拟。根据数值计算结果选出了合理的微引射系统结构,并对其工作性能进行了试验研究。数值模拟结果表明,在其他结构参数不变时,微引射系统中主射流孔间距和混合室长径比存在最佳值。将数值模拟结果与试验结果进行了对比,两者吻合良好,表明数值模拟方法可以用来对微引射热气除冰腔进行结构优化设计。

In order to improve the performance of aircraft hot-air de-icing system, the working principle of hot-air de-icer with micro-injector is introduced, and the performance of seven different hot-air de-icers with micro-injector is numerically investigated with FLUENT. According to the simulation results, the optimum structure is investigated experimentally. The results indicate that there exist best values in both injector spacing and mixing cavity aspect ratio with other parameters keeping invariant. The nu- merlca merlca results of injection ratio are in good agreement with experimental data, which indicates that nu approach could be employed in the structure optimization of hot-air de-icer with micro-injector.