考虑混合比偏差的大型双组元推进系统推进剂不可用量控制研究

Optimization of Unavailable Amount of Dual⁃element Propellant Caused by Mixing Ratio Deviation

针对大型航天器由于混合比偏差造成双组元推进系统的部分推进剂不可用的问题,提出了一种降低混合比偏差导致的推进剂不可用量的方法。通过增加一定量燃料使密度较大的氧化剂优先消耗完,从而降低该部分推进剂不可用量。基于该优化方法推导了最优燃料补加量和对应推进剂不可用量的理论公式,通过与优化前推进剂不可用量进行对比,证明了优化方法的有效性。

Large spacecraft using dual-element propellant system always has some unavailable propel-lant left due to mixing ratio deviation.To solve this problem,a new method is given in this paper to reduce that part of the unavailable propellant.The main idea of the method is to give priority to the consumption of the oxidant with higher density by adding a certain amount of fuel.Based on the meth-odology,the formula of the optimized amount of fuel added and the corresponding unavailable amount of propellant is derived.The effectiveness of this method is verified by comparing the amount of una-vailable propellant before and after optimization.