摘要
本文研究了两种实际气体多变功的直接积分数值求解模型,并编制了相应的计算程序。通过与平均过程指数法求得的多变功结果对比发现,直接积分求解模型较平均过程指数法计算得到的多变功具有更高的精度。当压比较高时,平均指数法得到的多变功误差明显增大甚至超过了4%,而直接积分模型计算得到的多变功在高压比下仍具有较高精度。
Two direct integration models of polytropic head analysis are presented,and the program codes are developed.It is found that the models of direct integration procedure are more accurate than that of average polytropic exponent in the polytropic head calculation.When the pressure ratio being large,the direct integration method still keeps higher accuracy while the error of the model of averaged polytropic exponent obviously increases even by over 4%.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2009年第11期1856-1858,共3页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.50725621)
关键词
离心式压缩机
实际气体
多变分析
热力设计
centrifugal compressor
real gas
polytropic analysis
preliminary design
