抽吸气流量对催化惰化系统性能影响

基于耗氧型惰化系统惰化原理，建立了绿色低温催化惰化系统（3CGIS）的AMESim仿真模型，研究了绿色低温催化惰化系统抽吸气流量对惰化时间的影响，以及飞行包线内燃油箱气相空间氧气体积分数变化。将计算结果与试验数据进行对比，结果表明，飞行包线内燃油箱气相空间氧气体积分数计算结果与试验结果基本一致，验证了仿真模型的正确性。在此基础上，得到抽吸气流量与惰化时间近似呈反比关系；当惰化时间一定时，抽吸气流量随载油率的降低而增加；针对下降阶段燃油箱气相空间氧气体积分数可能超过12%，提出一种双流量惰化模式设计方法，可保证氧气体积分数在整个飞行包线内低于12%。仿真结果为绿色低温催化惰化系统的设计与优化提供了依据。 

Effect of suction flow rate on performance of catalytic inerting system

Based on the principle of oxygen-consuming inerting system, the AMESim simulation model of low temperature controllable oxygen consumed catalytic green inerting system (3CGIS) was established. The effect of the suction flow rate of 3CGIS on the inerting time, and the change of the oxygen volume fraction in the fuel tank ullage under the flight envelope were researched. The prediction of oxygen volume fraction under the entire flight envelope was verified against the experimental data, showing a satisfactory agreement, and its validity wasvalidated with the comparison of results. On the basis of modeling, the suction flow rate is approximately inversely proportional to the initial inerting time were obtained; under a certain inerting time, the required suction flow rate increaseswith the decrease of fuel load. Aiming at the possibility that the oxygen volume fraction in the fuel tank ullage during the descent stage may exceed 12%, a dual-flow inerting mode design method is proposed to ensure that the oxygen volume fraction is less than 12% under the entire flight envelope. The results can be provided as a reference for design and optimization of low temperature controllable oxygen consumed catalytic green inerting system.