燃气轮机排气扩压器研究现状

doi:10.12096/j.2096-4528.pgt.21032

发电技术 ›› 2021, Vol. 42 ›› Issue (4): 437-446.DOI: 10.12096/j.2096-4528.pgt.21032

燃气轮机排气扩压器研究现状

邱彬¹^,³^,⁴^,⁵(), 付经伦¹^,²^,³^,⁴^,⁵^,*()

¹ 中国科学院工程热物理研究所先进燃气轮机实验室, 北京市海淀区 100190
² 中国科学院工程热物理研究所南京未来能源系统研究院, 江苏省南京市 211135
³ 中国科学院大学, 北京市海淀区 100049
⁴ 中国科学院先进能源动力重点实验室, 北京市海淀区 100190
⁵ 中国科学院轻型动力创新研究院, 北京市海淀区 100190

收稿日期:2021-04-25 出版日期:2021-08-31 发布日期:2021-07-22
通讯作者: 付经伦
作者简介:邱彬(1997), 女, 硕士研究生, 研究方向为燃气轮机排气扩压器与末级透平耦合机理和匹配优化, qiubin@iet.cn
基金资助:
国家自然科学基金项目(51776201)

Research Status of Gas Turbine Exhaust Diffuser

Bin QIU¹^,³^,⁴^,⁵(), Jinglun FU¹^,²^,³^,⁴^,⁵^,*()

¹ Advanced Gas Turbine Laboratory, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Haidian District, Beijing 100190, China
² Nanjing Institute of Future Energy System, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Nanjing 211135, Jiangsu Province, China
³ University of Chinese Academy of Sciences, Haidian District, Beijing 100049, China
⁴ Key Laboratory of Advanced Energy and Power, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Haidian District, Beijing 100190, China
⁵ Innovation Academy for Light-duty Gas Turbine, Chinese Academy of Sciences, Haidian District, Beijing 100190, China

Received:2021-04-25 Published:2021-08-31 Online:2021-07-22
Contact: Jinglun FU
Supported by:
National Natural Science Foundation of China(51776201)

摘要/Abstract

摘要：

燃气轮机是关系国家安全和国民经济发展的核心装备，排气扩压器气动性能对燃气轮机整机效率有重要影响。排气扩压器与上游流场的相互作用及其复杂的几何结构，导致了扩压器内流场易分离、多损失的流动特征。为探明扩压器的流动特征及其与透平的耦合机理，综述了国内外扩压器气动性能和优化设计的研究现状，讨论了扩压器设计与优化方面未来的研究方向，未来的研究需要充分考虑透平和扩压器的相互作用以及将参数化等方法引入扩压器优化设计问题以提高工作效率。

关键词: 燃气轮机, 排气扩压器, 性能研究

Abstract:

Gas turbine is the important equipment used in security and economic field of the country. The aerodynamic performance of exhaust diffuser has an important influence on the thermodynamic efficiency of gas turbine. The flow interaction between the exhaust diffuser and the upstream turbine and the complex geometrical configurations leads to the strong vortex pattern and high flow losses in the diffuser which reduces the performance of the upstream turbine and exhaust diffuser. In order to investigate the flow characteristics of diffusers and the coupling mechanism between the diffuser and the turbine, the research status of aerodynamic performance and optimal design of diffusers at home and abroad was reviewed. The prospect of research on the design and optimization of the diffuser was discussed. The interaction between the turbine and the diffuser should be fully considered in future research. Parameterization and other methods were introduced into the optimal design of the diffuser to improve the working efficiency.

Key words: gas turbine, exhaust diffuser, performance research

中图分类号:

TK05

邱彬, 付经伦. 燃气轮机排气扩压器研究现状[J]. 发电技术, 2021, 42(4): 437-446.

Bin QIU, Jinglun FU. Research Status of Gas Turbine Exhaust Diffuser[J]. Power Generation Technology, 2021, 42(4): 437-446.

图/表 11

表1 世界主要重型燃气轮机排气结构及排气参数

Tab. 1 Exhaust structure and exhaust parameters of the world's main heavy-duty gas turbines

厂家	机型	排气形式	排气流量/(kg/s)	排气温度/℃	轴向长度/m
三菱	M701D	冷端输出轴向排气	453	542	11.9
	M701F		748	630	14.3
	M701J		896	630	16.7
	M701JAC		765	663	16.7
GE	9E	热端输出径向排气	-	538	20
	9FA	冷端输出轴向排气	624	609	22.6
	9HA01	冷端输出轴向排气	996	636	-
西门子	SGT5-2000E	冷端输出轴向排气	558	536	10.3
	SGT5-4000F		752	599	10.8
	SGT5-8000H		953	630	12.6

图1 M701J型燃气轮机示意图

Fig.1 Schematic diagram of M701J gas turbine

图2 西门子各级燃气轮机

Fig.2 Schematic diagram of gas turbine of Siemens

图3 带有不同支撑结构扩压器静压恢复

Fig.3 Static pressure recovery for different diffusers

图4 原始扩压器和2种改进环形扩压器示意图

Fig.4 Schematic diagram oforiginal diffuser and two improved annular diffusers

图5 3种扩压器的静压恢复

Fig.5 Static pressure recovery for three diffusers

图6 扩压通道子午线对比

Fig.6 Comparison of baseline and parameterized design of diffusers

图7 原始支撑和优化后的支撑对比

Fig.7 Comparison of original struts and optimized struts

图8 改进设计前后扩压器压力分布图

Fig.8 Pressure distribution of diffuser before and afterdesign

图9 优化后的扩压器压力分布图

Fig.9 Pressure distribution diagram of optimized diffuser

图10 优化模型和初始模型流线图的对比

Fig.10 Comparison of streamlines betweenoptimized model and initial one

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燃气轮机排气扩压器研究现状

Research Status of Gas Turbine Exhaust Diffuser

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