| 摘要: |
| 为了研究不同的预旋角度对高位进气转静系旋转盘冷却与换热特性的影响,分别在三种预旋进气角度(0°,15°,30°)下对转盘的冷却效果进行了试验。通过试验,得到了每种预旋角度下的温度分布、盘面局部努赛尔特数分布、盘面平均努赛尔特数、转盘无量纲总体平均温度和转盘无量纲径向平均温差等参数。试验结果显示:高位垂直进气的冷却效果最好,预旋15°次之,预旋30°最低。并且流量变化对转盘的冷却效果影响较大,而转盘旋转影响较小。 |
| 关键词: 燃气轮机 涡轮转子 传热系数 温度分布 |
| DOI： |
| 分类号:V231.3 |
| 基金项目: |
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| Cooling effectiveness in a rotor-stator system with different pre-swirl angles |
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LUO Xiang1, XU Guo-qiang2, TAO Zhi3, DING Shui-ting4
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1.Coll.of Energy and Power Engineering,Beijing Univ.of Aeronautics and Astronautics,Beijing 100083,China;2.Coll.of Energy and Power Engineering,Beijing Univ.of Aeronautics and Astronautics,Beijing 100084,China;3.Coll.of Energy and Power Engineering,Beijing Univ.of Aeronautics and Astronautics,Beijing 100085,China;4.Coll.of Energy and Power Engineering,Beijing Univ.of Aeronautics and Astronautics,Beijing 100086,China
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| Abstract: |
| An experimental study of the flow and heat transfer characteristics in a pre-swirl rotor-stator system was described.Pre-swirl cooling air through nozzles in the stator flowed radially outwards and left system from the clearance between rotor and stator.Three kinds of pre-swirl nozzles(orifice angle of inclination at 0°,15°,and 30°) were applied to study cooling effects of pre-swirl flow on the rotating disk.Some parameters including distributions of temperature,local and averaged Nusselt number,dimensionless excessive body average temperature and dimensionless radial temperature difference were measured in the tests.It shows that the nozzle with 0° angle of inclination has the highest cooling effectiveness,followed by the 15° nozzle and then the 30° nozzle.The cooling flow rate plays a more important role on cooling effectiveness than rotating speed. |
| Key words: Gas turbine Turbine rotor Heat transfer coefficient Temperature distribution |
