| 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 |
摘要:
| |||
| 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%。 | |||
| 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 words：centrifugal compressorone-dimensional designdiffuseroptimization design | |||
| 收稿日期: 2015-01-12 出版日期: 2015-11-16 | |||
| |||
| 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.cnE-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 |
图表:
 |
| 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 |
参考文献:
| [1] Galvas M R. FORTRAN Program for Predicting Off-Design Performance of Centrifugal Compressors [R]. TN D-7487. Cleveland, OH: NASA, 1952. [2] Aungier R H. Mean streamline aerodynamic performance analysis of centrifugal compressors [J]. Journal of Turbomachinery, 1995, 117(3): 360-366. [3] Oh H W, Yoon E S, Chung M K. An optimum set of loss models for performance prediction of centrifugal compressors [J]. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 1997, 211(4): 331-338. [4] Conrad O, Raif K, Wessels M. The calculation of performance maps for centrifugal compressors with vane-island diffusers [C]// ASME Twenty-fifth Annual International Gas Turbine Conference and Twenty Second Annual Fluids Engineering Conference on Performance Prediction of Centrifugal Pumps and Compressors. New Orleans, LA: ASME, 1980: 135-147. [5] Jansen W. A method for calculating the flow in a centrifugal impeller when entropy gradients are present [C]// Royal Society Conference on Internal Aerodynamics (Turbomachinery). London: Institution of Mechanical Engineers, 1967: 133-146. [6] Coppage J E, Dallenbach F, Eichenberger H P, et al. Study of Super-Sonic Radial Compressors for Refrigeration and Pressurization Systems [R]. WADC Report 55-257. Los Angeles, CA: AiResearch Mfg Div, Garrett Corp, 1956. [7] Johnston J P, Dean J R. Losses in vaneless diffusers of centrifugal compressors and pumps: Analysis, experiment, and design [J]. Journal of Engineering for Gas Turbines and Power, 1966, 88(1): 49-62. [8] Daily J W, Nece R E. Chamber dimension effects on induced flow and frictional resistance of enclosed rotating disks [J]. Journal of Fluids Engineering, 1960, 82(1): 217-232. [9] Rodgers C. Influence of Impeller and Diffuser Characteristics and Matching on Radial Compressor Performance [R]. SAE 610159. Warrendale, PA: SAE, 1961. [10] Japikse D. Centrifugal Compressor Design and Performance [M]. Wilder, VT: Concepts ETI, 1996. [11] McKain F, Holbrook J. Coordinates for a High Performance 4∶1 Pressure Ratio Centrifugal Compressor [R]. CR-204134. Detroit, MI: NASA, 1997. [12] Skoch G J, Prahst P S, Wernet M P, et al. Laser Anemometer Measurements of the Flow Field in a 4∶1 Pressure Ratio Centrifugal Impeller [R]. TM-107541. Cleveland, OH: NASA, 1997. |
相关文章:
|
