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旋转孔与腔组成的孔腔系统为航空发动机空气系统的重要组成部分,其瞬态响应过程可能诱发短时危险过渡态载荷。为研究旋转孔腔的瞬态演化规律,以旋转孔前的容腔为研究重点,建立了带旋转孔的容腔CFD计算模型,分析了孔腔系统的瞬态演化过程,并基于旋转孔的稳态流动特性建立了带旋转孔容腔的瞬态1-D模型,对瞬态演化过程进行了仿真。通过对比瞬态1-D模型的结果和CFD结果,发现采用前者能基本模拟容腔的瞬态演化过程,基本满足工程需要,并完成了瞬态1-D模型结果产生偏差的原因分析。
The cavity system composed of rotating hole and cavity is an important part of the aero-engine air system. The transient response process may induce short-time dangerous transition state load. In order to study the transient evolution law of the rotating cavity, the CFD calculation model of the cavity with rotating hole is established. The transient evolution of the cavity system is analyzed. Based on the analysis of the rotating hole Steady-state flow characteristics A transient 1-D model of a cavity with rotating holes was established and the transient evolution process was simulated. By comparing the results of transient 1-D model with the results of CFD, it is found that the former can simulate the transient evolution of the cavity, which basically meets the engineering requirements and the analysis of the causes of the deviation of the transient 1-D model results.