暂冲气源的容器压力变化与管道非定常流动计算  

Non-Steady Flow Calculation of Pipeline and Pressure Change of Container of Temporary Impulse Source Test-Bed

作　　者：赵运翔 郭良斌[1] 

机构地区：[1]武汉科技大学机械自动化学院,湖北武汉430081

出　　处：《机械设计与制造》2015年第11期67-70,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金(51475341)

摘　　要：研究了气体轴承实验台暂冲气源容器的压力变化和管道内非定常流动的特性。利用特征线法对一阶偏微分方程进行求解。将管路末端阀门简化为固定节流口,分析了不同大小节流口对管道流动的影响。采用FORTRAN语言编写计算程序,结果表明:管道内气体流场达到稳定状态需要0.08s,暂冲气源在工作过程中容器的压强会减小,由10bar减小到5bar需要5.3s,此时间长度满足了测试所需的时间要求。节流口Φ值越大,气体流速越大,管道内气体流场达到稳定所需时间越短。特征线法能满足计算精度和速度的要求,为实验台管道系统的研究提供了一种可能的方法。To study the gas flow characteristics of pipeline and pressure change of container of temporary impulse source test- bed of gas bearing, the characteristics method is used to solve the first order partial differential equation. The valve installed in the end of the pipeline is simplified as fixed orifice. It analyzes the impact on the pipeline flow of different size orifice and writes the program in FORTRAN language. The results show that it takes 0.08 seconds to reach steady flow of pipeline. The pressure of container will reduce. It takes 5.3 seconds with the pressure of container reducing from 10 bar to 5 bar. The length of time satisfies the requirement of testing. The gas velocity increase gradually with the value of Ф increases. It takes less time to reach steady flow when the value of Ф increases. Characteristics method can satisfy the requirements of accuracy and computation speed. It provides a possible approach for the further study and optimization.

关 键 词：气体轴承 暂冲气源 管道 非定常流动 特征线法 

分 类 号：TH16[机械工程—机械制造及自动化] TH138