输送管内低温流体滞止状态热力参数数值仿真

Numerical simulation of thermodynamic parameters of cryogenic fluid in stagnation state within conveying pipeline

研究输送管路中截止阀附近低温流体滞止状态的热力参数变化规律,利用有限容积法建立输送管中低温流体的流动过程及滞止状态的数学模型,对管路几何结构和各种漏热量对于低温流体滞止状态热物性的影响进行仿真计算,分析截止阀前低温流体温度升高的主要原因。研究结果表明:减小管路长度,适当增大管壁漏热量,以及减小阀门漏热量可有效降低阀门前低温流体滞止状态的温度升高幅度,为火箭燃料加注系统的改进及新系统的设计提供了一定的参考。

The thermodynamic parameters variation in the stagnation state of the cryogenic fluid near the globe valve in the delivery pipelines was investigated. A mathematical model of the flow process of conveying pipelines was presented using the finite volume method. The influences of the pipelines geometry and the heat leakage on the cryogenic fluid in the state of stagnation were analyzed, and the dominant reasons of the temperature rise before the globe valve were investigated. The results show that the temperature rise can be reduced by decreasing the pipeline length, the value heat leakage, and increasing the pipe wall heat leakage properly. This work can be applied as a design reference for improvement of the rocket fuel filling system and other new systems.