摘要
在纯气膜蒸汽冷却叶片结构基础上,在其前腔设计加装了冲击冷却套筒,目的是对纯气膜冷却中叶片出现的高温区采用射流冲击冷却方式来进一步降低高温区的温度,强化了换热效果。为得到叶片内部流道的流动情况和叶片外表面压力分布、温度分布情况,借助ANSYS CFX软件对其进行流热固耦合数值模拟,并对其进行对比分析。结果表明,采用冲击-气膜组合冷却方式与传统气膜冷却方式相比,可使叶片高温区最多再降低150K,整体冷却效率可达到60%。
Based on the pure steam film cooling blades, add a cooling set in front of the blade. Use of jet impact cooling to reduce the temperature of the high-temperature region. Analysis and numerical simulation of flow field and temperature field in finite element analysis software CFX. Then get the flow field of the inner flow channel, the pressure and temperature of the outside surface of the blade. The calculated results show that the impingement-film steam-cooling is a better method than the traditional film one. The impingement-film steam-cooling method can further reduced the blade temperature up to 150K, and the overall cooling efficiency up to 60%.
出处
《汽轮机技术》
北大核心
2013年第3期185-188,共4页
Turbine Technology
关键词
蒸汽冷却
射流冲击
数值模拟
steam cooling
jet impingement
numerical simulation
