带级间冷却的双级离心压缩机可调进口导叶联合调节分析

doi:10.12028/j.issn.2095-4239.2016.0010

储能科学与技术 ›› 2017, Vol. 6 ›› Issue (1): 108-115.doi: 10.12028/j.issn.2095-4239.2016.0010

带级间冷却的双级离心压缩机可调进口导叶联合调节分析

闫雪1,2，左志涛1，梁奇1,2，汤宏涛1，陈海生1

1中国科学院工程热物理研究所，北京 100190；2中国科学院大学，北京 100049

收稿日期:2016-04-06 修回日期:2016-07-17 出版日期:2017-01-03 发布日期:2017-01-03
通讯作者: 陈海生，研究员，研究方向为大规模压缩空气储能，E-mail：chen_hs@ mail.etp.ac.cn。
作者简介:闫雪（1990—），女，硕士研究生，研究方向为压缩空气储能、叶轮机械气动热力学，E-mail：yanxue_hcl@163.com；
基金资助:
国家重点基础研究发展计划项目（973计划）（2015CB251302）和国家自然科学优秀青年基金项目（51522605）。

Analysis on joint adjusting of a two-stage centrifugal compressor with inter-stage cooling and variable guide vanes

YAN Xue1,2, ZUO Zhitao1, LIANG Qi1,2, TANG Hongtao1, CHEN Haisheng1

1Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;
2University of Chinese Academy of Sciences, Beijing 100049, China

Received:2016-04-06 Revised:2016-07-17 Online:2017-01-03 Published:2017-01-03

摘要/Abstract

摘要： 本文建立了带级间冷却的双级离心压缩机计算模型，该模型利用多孔介质模拟级间换热器，且压缩机每级前均设有可调导叶进行变工况调节。利用该模型详细分析了双级离心压缩机变导叶联合调节性能，研究发现单级变导叶调节时，两级导叶调节规律相同，正开度改善了失速特性，负开度能够获得更高的压比，正负开度使得效率都有所降低。双级联调时，以一、二级导叶开度都为0°的工况为基准，当第一、二级导叶都为负开度时压比增大，其余开度组合的压比性能都有所降低，任意组合导叶开度的效率性能都低于基准工况。通过内部流动分析可知，合理的双级联调改善了第二级压缩机内部流动的均匀性，两级导叶对双级离心压缩机的整体性能影响效果的强弱基本相同，第一级开度由负到正变化时，第一级叶轮进口叶尖吸力面附近高速流体区域缩小，并在压力面凝聚。

关键词: 双级离心压缩机, 级间冷却, 可调导叶, 联合调节

Abstract: A numerical model of a two-stage centrifugal compressor with inter-stage cooling and variable guide vanes has been developed. Analyses are made using the model on the performance of the compressor while the two-stage vanes are adjusted. The results illustrate that when each of the two-stage guide vanes adjusted, they follows the same rules: a positive opening of the guide vane improves the stall features; a negative opening leads to a pressure ratio increase.; but the isentropic efficiency drops for both the positive or negative openings of the vane. When two-stage guide vanes are adjusted jointly using the zero opening as the reference, the pressure ratio increases only when the opening of two-stage guide vanes are all negative whereas the pressure ratio decreases in all other cases. The isentropic efficiency of all opening cases is lower than that at the reference condition. Internal flow analyses suggest that the uniformity of the internal flow of the second stage can be improved through jointly adjusting the two vanes. The effect of adjusting the guide vanes of the two stages is the same on the performance of the two-stage centrifugal compressor. When the opening of first stage guide vane changes from negative to positive, the area of high velocity at the suction surface of the impeller inlet shroud decreases, concentrating on the pressure surface around the shroud.

Key words: two-stage centrifugal compressor, interstage cooling, adjustable guide vane, joint adjusting

闫雪1,2，左志涛1，梁奇1,2，汤宏涛1，陈海生1. 带级间冷却的双级离心压缩机可调进口导叶联合调节分析[J]. 储能科学与技术, 2017, 6(1): 108-115.

YAN Xue1,2, ZUO Zhitao1, LIANG Qi1,2, TANG Hongtao1, CHEN Haisheng1. Analysis on joint adjusting of a two-stage centrifugal compressor with inter-stage cooling and variable guide vanes[J]. Energy Storage Science and Technology, 2017, 6(1): 108-115.

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带级间冷却的双级离心压缩机可调进口导叶联合调节分析

Analysis on joint adjusting of a two-stage centrifugal compressor with inter-stage cooling and variable guide vanes

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参考文献

[17] GALVAS M R. Analytical correlation of centrifugal compressor design geometry for maximum efficiency with specific speed[R]. USA: Washington D.C., 1972.

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