Pressurized pressure-restoring system for large scale vacuum chamber
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摘要: 对于一些特殊用途的设施,如用于训练航天员的地面模拟舱,对复压过程有严格要求.为了分析某些对复压速率有要求的设施的复压过程,设计了有压复压系统;建立了大型真空容器有压复压系统的分段集中参数模型和传热模型,并且对这些模型进行了仿真分析.仿真表明:有压复压可获得比大气复压大得多的复压速率;传热会降低复压速率;分段集中参数长管道模型能提高仿真精度,同时不会过大增加计算量.对某体积为200m3的容器复压试验表明,考虑容器换热的仿真计算与实际调试情况误差在5%左右,表明了理论分析计算的正确性.Abstract: Pressure-restoring process has strict requirements in some special purpose establishments such as ground simulator for astronauts- training. A pressurized pressure-restoring system was designed for large-scale vacuum chambers with a view of analyzing the pressure-restoring process with high speed requirement. Simulation models were established with special focus on heat transfer, while incorporating segmented centralized parameter models of a long gas tube. An simulation analysis was done to the models. The calculations show that the pressurized pressure-restoring rate is much greater than that of regular pressure-restoring, the rate is strained by heat transfer, and the segmented centralized parameter models of the long gas tube deliver better accuracy than the other kinds of models but with no more calculating jobs. Compared the simulation calculations of heat transfer with the actual debugging situation in the pressure-restoring test of a large 200m3 chamber, the error is no more than 5%, which proves the reliability of the whole simulation.
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