分析了全流量补燃循环发动机系统启动过程难点,针对全流量补燃循环缩尺发动机热试车启动过程,分别就发动机中富燃/富氧预燃室的自身启动和相对启动过程进行了设计;采用管路-体积组合模块化方法,建立了发动机启动过程仿真模型,进行了仿真计算。按设计启动方案进行了多次热试车,试车结果表明发动机点火可靠,启动过程平稳,无烧蚀现象,且仿真结果很好地预示了热试车情况。 The difficulties in starting process of full-flow co-combustion engine system were analyzed. According to the start-up process of full-scale co-combustion cycle scale engine heat test, the self-starting and relative starting process of rich / oxygen- Pipeline - volume combinatorial modular method, the establishment of a simulation model of the engine starting process, a simulation calculation. According to the design start-up program, several hot test runs were carried out. The test results showed that the engine ignition was reliable, the start-up process was stable, and no ablation was observed. The simulation results amply predicted the hot test run.