储能科学与技术 ›› 2017, Vol. 6 ›› Issue (6): 1231-.doi: 10.12028/j.issn.2095-4239.2017.0015

• 特约文章 • 上一篇    下一篇

离心压缩机可调叶片扩压器优化设计与调节分析

张  阳1，左志涛2，梁  奇1，周  鑫2，陈海生2   

  1. 1中国科学院大学，北京 100190；2中国科学院工程热物理研究所，北京 100190
  • 收稿日期:2017-02-20 修回日期:2017-04-05 出版日期:2017-11-01 发布日期:2017-11-01
  • 通讯作者: 陈海生，研究员，研究方向为压缩空气储能技术，E-mail：chen_hs@mail.etp.ac.cn。
  • 作者简介:张阳（1991—），男，硕士研究生，研究方向为压缩空气储能系统中离心压缩机叶片扩压器变工况调节，E-mail：zhangyang@iet.cn
  • 基金资助:
    国家自然科学基金项目（51522605，51611130201），国家重点基础研究发展计划（973计划）（2015CB251302），北京市科技计划项目（D161100004616001，D161100004616002），中国科学院前沿科学重点研究项目（QYZDB-SSW-JSC023）。

Optimal design and adjustment analysis of an adjustable vane diffuser in a centrifugal compressor

ZHANG Yang1, ZUO Zhitao2, LIANG Qi1, ZHOU Xin2, CHEN Haisheng2   

  1. 1University of Chinese Academy of Sciences, Beijing 100190, China; 2Institute of Engineering Thermodynamics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2017-02-20 Revised:2017-04-05 Online:2017-11-01 Published:2017-11-01

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297

被引次数

3

摘要： 大规模压缩空气储能系统在电网削峰填谷、区域能源系统及可再生能源大规模接入等潜在的应用很广，其压缩系统需具备高效、宽工况调节等特点。可调式叶片扩压器结构紧凑，可以使离心压缩机获得更宽的工况范围和更高的运行效率，因此本文以大规模压缩空气储能系统离心压缩机为研究对象，对原有扩压器叶型进行多目标优化，并通过数值方法探究可调叶片扩压器的调节规律，获得调节曲线。结果表明，优化后的三元扭曲叶片能够降低叶轮出口流场不均匀性对扩压器的影响，提高压缩机整级性能；设计转速下，叶片扩压器的调节范围在8°～+5°之间；采用可调叶片扩压器使压缩机的工作范围提高117%，同时变工况下离心压缩机的性能也有明显改善。

关键词: 压缩空气储能, 离心压缩机, 可调式叶片扩压器, 优化设计, 调节规律

Abstract:

 Large scale compressed air energy storage systems have the potential for a wide range of applications including peak load shifting, distributed energy systems, and renewable energy utilization. However, such a technology requires the compression system to have a high efficiency and a wide operating range. The use of adjustable vane diffusers provides a compact solution to enlarge the operating regime of the compressor with a high efficiency. In this paper, a centrifugal compressor with a vane diffuser for large scale compressed air energy storage is analyzed. A multi-objective optimization method is applied to the initial diffuser vane. Through numerical modelling, the regulation relationship and the perform curve are obtained The results show that the optimized three dimensional twisted vane can reduce the impact of the non-uniform impeller outlet flow on the diffuser and improve the performance of the compressor. The adjustable range of the vane diffuser is between 8°and +5°at the design speed. The use of the adjustable vane diffuser could improve the operating regime of centrifugal compressors by 117%. Significant improvement could also occur on the compressor performance at off-design conditions.

Key words: compressed air energy storage, centrifugal compressor, adjustable vane diffuser; , optimization design, regulation rules