实际气体离心式压缩机性能换算方法

段亚飞; 邹瀚森; 陈翰; 刘丹; 王志恒; 席光

doi:10.7652/xjtuxb202611013

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实际气体离心式压缩机性能换算方法

更新时间：2026-11-09

- 实际气体离心式压缩机性能换算方法
- Performance Conversion Method for Real-Gas Centrifugal Compressors
- 西安交通大学学报 2026年60卷第11期页码：145-155
- 作者机构：
  
  西安交通大学能源与动力工程学院，710049，西安
- 作者简介：
  
  段亚飞（1989—）男，博士生；
  席光（通信作者），男，教授，博士生导师。
- 基金信息：
  
  国家重点研发计划资助项目(20231FC3806401)
- DOI：10.7652/xjtuxb202611013
  中图分类号： TH452.1
- 收稿：2026-04-03，
  
  网络首发：2026-06-29，
  
  纸质出版：2026-11-10
- 稿件说明：
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段亚飞, 邹瀚森, 陈翰, 等. 实际气体离心式压缩机性能换算方法[J/OL]. 西安交通大学学报,2026,60 (11):145-155. https://doi.org/10.7652/xjtuxb202611013.

DUAN Yafei, ZOU Hansen, CHEN Han, et al. Performance Conversion Method for Real-Gas Centrifugal Compressors[J/OL]. Journal of Xi'an Jiaotong University,2026,60 (11):145-155. https://doi.org/10.7652/xjtuxb202611013.
段亚飞, 邹瀚森, 陈翰, 等. 实际气体离心式压缩机性能换算方法[J/OL]. 西安交通大学学报,2026,60 (11):145-155. https://doi.org/10.7652/xjtuxb202611013. DOI：

DUAN Yafei, ZOU Hansen, CHEN Han, et al. Performance Conversion Method for Real-Gas Centrifugal Compressors[J/OL]. Journal of Xi'an Jiaotong University,2026,60 (11):145-155. https://doi.org/10.7652/xjtuxb202611013. DOI：

摘要

针对实际气体物性引起离心式压缩机变转速相似换算精度下降的问题，以能头系数和多变效率为相似准则，提出了一种融合焓-效反求出口物性与密度修正流量的相似换算方法（TREED）。首先基于能头系数相等假设获取变转速后的出口焓值，继而通过效率迭代使多变效率与原始工况一致以获取出口热物性，最后利用进出口密度对完全流动相似理论计算的流量进行修正。以某离心式压缩机分别以空气和R134a为工质的数值模拟结果为例，将TREED方法与现有换算方法进行了对比研究，结果表明：与现有最优换算方法相比，当工质为理想气体时，TREED方法可将换算精度提高约20%；当工质为实际气体时，其精度提升更为显著，可达约136%。TREED方法显著提升了实际气体压缩机在宽转速、宽流量范围内的相似换算精度，具有良好的工程应用前景。

Abstract

To address the accuracy degradation in similarity conversion for centrifugal compressors operating at variable speeds caused by real gas properties

a similarity conversion method named TREED is proposed.This method uses the head coefficient and polytropic efficiency as similarity criteria and integrates the enthalpy-efficiency inverse derivation of outlet properties with densitycorrected flow rate.First

the outlet enthalpy under variable-speed conditions is obtained based on the assumption of an equal head coefficient.Next

through iterative matching of the polytropic efficiency with that of the original operating condition

the outlet thermophysical properties are determined.Finally

the flow rate calculated from the complete flow similarity theory is corrected using the inlet and outlet densities.A comparative study between the TREED method and existing conversion methods is conducted using numerical simulation results of a centrifugal compressor with air and R134a as working fluids.Compared with the existing optimal conversion method

the TREED method improves the conversion accuracy by about 20% for ideal gas and by up to 136% for real gas.TREED significantly improves the similarity conversion accuracy for real-gas compressors over a wide range of speeds and flow rates

demonstrating promising prospects for engineering applications.

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