超高压驱动系统气动特性分析

Analysis of Aerodynamic Characteristics of Hyper-high Pressure Driver

超高压工况下,气动特性分析需考虑真实气体效应。针对超高压驱动系统的气动参数计算问题,提出一种以质量方程和能量方程为基础,联立实际气体状态方程的超高压气动特性分析方法。引入喷管背压和元件传热等边界条件,以及初始热力状态条件,再结合活塞阀门控制规律等,建立了超高压驱动系统气动特性分析模型。对长行程活塞式超高压驱动系统在基准条件下进行气动参数计算,通过对运行特性进行评估,得到的计算结果满足设计指标。

The real gas effect should be considered in the analysis of aerodynamic characteristics under hyper-high pressure conditions.Aiming at the calculation problem of the aerodynamic parameters of the hyper-high pressure drive system,a new analysis method of the hyper-high pressure aerodynamic characteristics is proposed based on the mass equation,the energy equation and the actual gas state equation.By introducing the boundary conditions,such as nozzle back pressure and component heat transfer,as well as the initial thermodynamic conditions with the control law of piston and valve,the aerodynamic characteristics analysis model of the hyper-high pressure drive system is established.The aerodynamic parameters of the long-stroke piston type hyper-high pressure drive system are calculated under the reference conditions.Through the evaluation of the operating characteristics,the calculated results meet the design specifications.