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| 空冷汽轮机末两级变工况三维流动的数值模拟 | |
| 引用本文： | 綦蕾,邹正平,陆宏志,于尔亮,田东强,师黎明. 空冷汽轮机末两级变工况三维流动的数值模拟[J]. 动力工程, 2005, 25(5): 647-651 |
| 作者姓名： | 綦蕾 邹正平 陆宏志 于尔亮 田东强 师黎明 |
| 作者单位： | 1. 北京航空航天大学,气动热力重点实验室,北京,100083 2. 香港理工大学,机械学系,香港 3. 北京北重汽轮电机有限责任公司,北京,100040 |
| 摘 要： | 采用三维粘性数值模拟方法对变工况下空冷汽轮机末两级流动进行了模拟,研究了效率和脱流高度等重要参数的变化规律,着重分析了设计点和小容积流量工况时的三维流场。通过分析了解了机组在变工况运行时末级流动的特点,为空冷汽轮机末级叫片的设计和优化提供了依据。图8参5 |
| 关 键 词： | 动力机械工程 空冷汽轮机 末级叶片 变工况 数值模拟 |
| 文章编号： | 1000-6761（2005）05-0647-05 |
| 收稿时间： | 2005-01-10 |
| 修稿时间： | 2005-01-102005-04-31 |
Numerical Simulation of 3-Dimensional Flow in Last Two Stages of Air-cooled Steam Turbines |
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| QI Lei,ZOU Zhen-ping,LU Hong-zhi,YU Er-liang,TIAN Dong-qiang,SHI Li-ming. Numerical Simulation of 3-Dimensional Flow in Last Two Stages of Air-cooled Steam Turbines[J]. Power Engineering, 2005, 25(5): 647-651 | |
| Authors: | QI Lei ZOU Zhen-ping LU Hong-zhi YU Er-liang TIAN Dong-qiang SHI Li-ming |
| Affiliation: | 1. National Key Lab. Of Aero-Thermodynamics, Beijing University of Aeronautics and Astronautics, Beijing 100083, China ;2. Department of Mechanical Engineering, Hongkong Polytechnic University, Hongkong, China; 3. Beijing Beizhong Steam Turbine-Generator Co. Ltd., Beijing 100040, China |
| Abstract: | Flow in last two stages of air-cooled steam turbines under varying load conditions is being studied with the help of numerical 3-dimensional viscous flow simulation methods. The laws that govern variations, like efficiency and blade's height, at which flow separation occurs, are being studied; specially analyzed in detail were the 3-dimensional flow fields under design and low volume flow conditions. Understanding of the particularities of flow conditions in the last stages under varying turbine load conditions are gained by an analysis, which may serve as a reference for design and optimization of the last stage blades of air cooled steam turbines. Figs 8 and refs 5. |
| Keywords: | power and machanical engineering air-cooled steam turbine last stage blade varying load numerical simulation |
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