高压气体定容积定流量放气特性  

Characteristics of constant volume and flow releasing of high-pressure gas

作　　者：赵芳 王海锋[1] 任泽斌[1] 徐大川[1] 史煜[1] ZHAO Fang;WANG Haifeng;REN Zebin;XU Dachuan;SHI Yu(Facility Design and instrumentation institute,China Aerodynamics Research and Development Center,Mianyang 621000,China)

机构地区：[1]中国空气动力研究与发展中心设备设计及测试技术研究所,四川绵阳621000

出　　处：《中南大学学报（自然科学版）》2021年第4期1261-1267,共7页Journal of Central South University:Science and Technology

基　　金：国家高技术研究发展计划(863计划)项目(2014AA8061009)。

摘　　要：相对于真实气体模型,高压状态下理想气体模型有一定的局限性,为对比分析两者之间的偏差,引入压缩因子,结合维里方程与气体动力学方程,以高压气罐定流量放气系统为研究对象,建立放气过程的真实气体数学模型。在此基础上,通过龙格-库塔法对比研究系统从不同气罐初始压力分别放气至6 MPa时所需的放气时间及温度与压力的变化,并将部分计算结果与实验进行对比。研究结果表明:在放气过程中,真实气体效应下的温度、压力下降更快;气源压力越高,真实气体效应越明显;相对于理想气体模型,真实气体模型下的仿真值更接近实验结果;相关研究可为领域内高压气体特性的研究、高压气罐容积的设计以及放气过程中温度与压力的变化提供参考。Compared with the real gas model,the ideal gas model under high pressure has certain limitations.In order to compare and analyze the deviation between the two models,mathematical model of real gas releasing process for the system of the high-pressure gas tank was set up based on the compression factor,Virial equation and the gas dynamics equation.On this basis,the time required,the temperature and pressure changes of the system from various initial pressure to 6 MPa respectively were studied through the Runge-Kutta method,and some of the calculated results were compared with the experimental results.The results show that the temperature and pressure under real gas effect decrease faster in the releasing process;The higher the gas source pressure,the more pronounced the real gas effect.Moreover,compared with the ideal gas model,the simulation value of the real gas model is closer to the experimental results.The related researches provide references for the study of highpressure gas characteristics,the design of high-pressure gas tank volume,and the change of temperature and pressure in the releasing process.

关 键 词：真实气体 理想气体 高压 维里方程 定容积 定流量 放气过程 龙格库塔 

分 类 号：TH138[机械工程—机械制造及自动化]