轨姿控液路分离接头流道仿真计算与分析

Analysis and Simulation for the Flow Filed in Liquid Separation Pipe Joint of an Orbit and Attitude Control System

轨姿控系统液管路分离接头因工作过程中存在流阻和液动力大的问题而影响其自身和下面级发动机工作,因此对液管路分离接头进行优化改进具有重要应用价值。根据液管路分离接头在某型轨姿控系统中所处的位置及工作原理,从减小流阻和稳态液动力的角度出发,设计了两型液路分离接头,采用3种不同装配方式,运用CFD软件FLUENT对液管路分离接头管道内部流场进行了分析计算。结果表明:所设计的第二型、采用第一种装配方式能使液管路分离接头管道内部流场压力分布较均匀,流阻和稳态液动力较小,表明优化后的管道内部结构合理,满足设计要求。

There is a problem for liquid separation pipe joint of orbit and attitude control system that because the flow resistance and the steady-state flow force overload in the working process so as to influence its own and below engine work,therefore it is of significance to optimization and improvement of the liquid separation pipe joint.According to the position and working principle of the liquid pipe separation joint in a certain orbit and attitude control system,from the perspective of decreasing flow resistance and steady state liquid power,two kinds of liquid separation joints were designed and three different assemblies were adopted.Using the CFD software FLUENT,the internal flow field of the liquid separation joint pipe was analyzed and calculated.The results show that the second type and the first assembly method can make the liquid flow separation pipe internal flow field pressure distribution more uniform and evenly,let flow resistance and steady state liquid power be small.It indicates that the optimized internal structure of the pipeline is reasonable and logical which can meet the design requirements.