壅塞流动下绝热毛细管长度的近似解析解  

APPROXIMATE ANALYTIC SOLUTION TO THE LENGTH OF ADIABATIC CAPILLARY TUBE UNDER THE CHOKED FLOW

作　　者：张春路[1] 丁国良[1] 

机构地区：[1]上海交通大学动力与能源工程学院,上海200030

出　　处：《机械工程学报》2002年第4期22-25,共4页Journal of Mechanical Engineering

基　　金：国家重点基础研究发展规划项目(G2000026309)子课题。

摘　　要：为适应毛细管的工程设计要求，在绝热毛细管积分近似模型的基础上，提出壅塞流动下绝热毛细管长度的近似解析解。对流动壅塞的情况，为解决积分近似模型中长度计算需要迭代的问题，通过长度与压力的变化关系，提出了一种直接判别与计算流动壅塞的方法。实例计算表明近似解满足工程精度要求。基于近似解，对绝热毛细管壅塞流动特性进行了理论分析。With requirements of designing an adiabatic capillary tube in engineering, an approximate analytic solution to the tube length derived from the approximate integral model is developed. In order to take the choked flow into account and avoid the consequent iterative calculation in the approximate integral model, a direct method for judging and evaluating the choked flow is presented on the basis of the relationship between length and pressure. Case study shows that the present approximate analytic solution could meet engineering precision. Based on the approximate analytic solution, the choked characteristics of flow in adiabatic capillary tubes are theoretically analyzed.

关 键 词：毛细管 壅塞流 近似解析解 长度 制冷空调装置 绝热 

分 类 号：TB65[一般工业技术—制冷工程]