存在衰减和真实气体效应的激波管激波速度的计算  

The Calculation of Shock Wave Speed in the Presence of Real Gas Effect and Shock Attenuation

作　　者：张京平[1] 

机构地区：[1]浙江大学,杭州310029

出　　处：《计量学报》2000年第1期45-50,共6页Acta Metrologica Sinica

基　　金：浙江大学流体传动及控制国家重点实验室资助

摘　　要：用一般理论计算激波管参数,由于激波的衰减不可避免以及一定压力下的气体是非理想气体,故会有不小误差。本文分别考虑了衰减和真实气体效应这两种对激波速度有影响的因素,对一种具有良好压力平台的激波管( 驱动气体为H2 ,被驱动气体为CO2) 中的激波速度进行了计算。首先采用考虑真实气体效应的理论,计算破膜后形成的初始激波速度;在激波沿管运行理论不能准确计算的阶段,采用由实验得出的激波衰减公式进行计算。计算结果与实验数据比较,相对误差优于0-65 % 。The theoretical calculation of the shock wave speed in a shock tube is not accurate because of the presence of real gas effect and shock attenuation. In this paper, the speed of shock wave in the shock tube (H 2 is used as a driving gas and CO 2 as a driven gas) is calculated by two special steps. The initial shock wave speed is calculated by theory , while the shock wave goes along the shock tube, and calculated by a shock wave attenuation formula which comes from experiment. The result of the calculation is coincident with that of the experiment, which can be used as a reference for the shock tube design.

关 键 词：激波形成 激波管 激波衰减 激波速度 

分 类 号：V211.751[航空宇航科学与技术—航空宇航推进理论与工程]