低温贮箱回流消能器结构设计及优化

Structure Design and Optimization of Current-return Damper in Cryogenic Tank

为有效耗散低温贮箱回流推进剂的动能,根据预冷回流的工作环境,设计出了莲蓬状回流消能器。对氧箱和氢箱回流消能器内、外流体的流动特性进行模拟计算,给出在不同工况条件下的迹线、压力场和速度场的分布,得出了回流消能器的局部流体阻力系数,并对氧箱回流消能器的结构参数进行了优化。研究结果证明,莲蓬状回流消能器特殊的结构形式能够提高预冷回流液体能量分布的均匀性,有效降低回流造成的扰动。

To dissipate the kinetic energy of current-return in propellant tank, according to behavior of cryogenic flow in tank, a shower head damper is designed. The behavior of internal and external flow is simulated, and then the trace, as well as the pressure field and velocity field in LO2 and LH2 tank on different modes are achieved. Based on calculating results, the principle of damper working process is formulated, also with coefficient of flow resistance of current-return damper in LO2 and LH2 tank. Finally, structural parameters of current-return damper in LO2 tank is optimized. Theoretical analysis and simulate results indicate that shower head damper can effectively reduce turbulence in current-return flow.