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清华大学学报(自然科学版)  2015, Vol. 55 Issue (10): 1110-1116    DOI: 10.16511/j.cnki.qhdxxb.2015.22.009
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某MW级燃机低压离心压气机优化设计
李培元1,2, 顾春伟1,2, 宋寅1,2
1. 清华大学 热能工程系, 热科学与动力工程教育部重点实验室, 北京 100084;
2. 先进航空发动机协同创新中心, 北京 100191
Optimization design of a low pressure centrifugal compressor in a MW size gas turbine
LI Peiyuan1,2, GU Chunwei1,2, SONG Yin1,2
1. Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China;
2. Collaborative Innovation Center of Advanced Aero-Engine, Beijing 100191, China
全文: PDF(1759 KB)  
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摘要 为了优化离心压气机叶轮与扩压器的匹配特性, 该文开发了基于iSIGHT的1维优化设计系统。针对某MW级燃机低压级离心压气机, 对其几何参数及匹配特性进行了优化设计。计算结果表明:原始设计中扩压器与叶轮不相匹配, 无叶扩压器径比过大, 从而导致整级效率偏低。根据1维优化计算结果, 在3维上对扩压器进行了重新设计,减小了无叶扩压器径比, 并采用串列式有叶扩压器代替了原有单级有叶扩压器。与原始设计相比, 优化后的离心压气机整级性能有了明显改善, 压比提高了约4%, 效率提高了约2%。
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李培元
顾春伟
宋寅
关键词 离心压气机1维设计扩压器优化设计    
Abstract:A one-dimensional optimization design system based on iSIGHT was used to optimize the matching of a diffuser with a centrifugal impeller. The system was then used to optimize the geometry and matching characteristics of a low pressure stage centrifugal compressor for a MW size gas turbine. The results show that the diffuser and impeller are not well matched in the original design. The diameter ratio of the vaneless diffuser is too large, resulting in low efficiencies throughout the entire stage. The one-dimensional optimization results are used to redefine the diffuser geometry to improve the performance. The vaneless diffuser outlet diameter is reduced and the original single stage diffuser is replaced by a tandem vane diffuser. The optimization significantly improves the performance of the entire stage. The pressure ratio is increased by about 4% and the efficiency is increased by about 2%.
Key wordscentrifugal compressor    one-dimensional design    diffuser    optimization design
收稿日期: 2015-01-12      出版日期: 2015-11-16
ZTFLH:  TU452  
基金资助:国家自然科学基金项目(51136003)
通讯作者: 顾春伟,教授,E-mail:gcw@mail.tsinghua.edu.cn     E-mail: gcw@mail.tsinghua.edu.cn
作者简介: 李培元(1986-),男(汉),宁夏,博士研究生。
引用本文:   
李培元, 顾春伟, 宋寅. 某MW级燃机低压离心压气机优化设计[J]. 清华大学学报(自然科学版), 2015, 55(10): 1110-1116.
LI Peiyuan, GU Chunwei, SONG Yin. Optimization design of a low pressure centrifugal compressor in a MW size gas turbine. Journal of Tsinghua University(Science and Technology), 2015, 55(10): 1110-1116.
链接本文:  
http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2015.22.009  或          http://jst.tsinghuajournals.com/CN/Y2015/V55/I10/1110
  表1 3种不同计算组合所采用损失模型的比较
  图1 3种不同模型组合对HPCC叶轮计算结果比较
  图2 低压离心压气机的几何结构
  表2 原始设计与优化设计结果比较
  图3 1维优化设计系统
  图4 1维优化历史
  图5 扩压器几何结构
  图6 原始设计与优化设计特性曲线比较
  图7 子午面流线图
  图8 原始设计(左)与优化设计(右)有叶扩压器内不同叶高流线分布
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