A New Optimization Method for Centrifugal Compressors Based on 1D Calculations and Analyses

Energies

Pei-Yuan Li²  Chu-Wei Gu¹  Yin Song² 

[1] Department of Thermal Engineering, Tsinghua University, Beijing 100084, China;

关键词: centrifugal compressor;    1D calculations;    optimization;   

DOI  :  10.3390/en8054317

来源: mdpi

【 摘 要 】

This paper presents an optimization design method for centrifugal compressors based on one-dimensional calculations and analyses. It consists of two parts: (1) centrifugal compressor geometry optimization based on one-dimensional calculations and (2) matching optimization of the vaned diffuser with an impeller based on the required throat area. A low pressure stage centrifugal compressor in a MW level gas turbine is optimized by this method. One-dimensional calculation results show that D3/D2 is too large in the original design, resulting in the low efficiency of the entire stage. Based on the one-dimensional optimization results, the geometry of the diffuser has been redesigned. The outlet diameter of the vaneless diffuser has been reduced, and the original single stage diffuser has been replaced by a tandem vaned diffuser. After optimization, the entire stage pressure ratio is increased by approximately 4%, and the efficiency is increased by approximately 2%.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.