高压涡轮外环流动换热的试验与数值研究  

Experimental and Numerical Study on Flow and Heat Transfer in the Outer Ring of a High-pressure Turbine

作　　者：殷林林 卢元丽 吴伟龙 陈云 YIN Linlin;LU Yuanli;WU Weilong;CHEN Yun(AECC Shenyang Engine Research Institute,Shenyang 110015,China)

机构地区：[1]中国航发沈阳发动机研究所,沈阳110015

出　　处：《动力工程学报》2024年第9期1437-1445,共9页Journal of Chinese Society of Power Engineering

摘　　要：为了获得不同冷气参数对高压涡轮外环流场和温度场的影响规律,采用加温加压试验研究了不同冷气与燃气流量比条件下的外环温度场及冷却效率,并将数值仿真结果与试验结果进行了对比分析,同时研究了不同燃气来流气流角条件对外环流动换热的影响。结果表明:数值仿真结果与试验结果吻合较好,采用测点进行温度平均计算的冷却效率略高于试验结果;试验条件下外环试验环境下燃气主流的流动存在明显的分离,周期性较差,通过在外环块侧边增加陪衬件有效地改善了外环块区域的流动周期性;当来流方向与气膜孔出流方向一致时,冷气覆盖效果较好,在一定角度范围内对冷却效率的影响较小,来流气流角与气膜孔出流方向存在最佳匹配值。In order to obtain the influence of different cold air parameters on the flow and temperature characteristics of the outer ring of a high-pressure turbine,heating and pressurization test methods were used to study the temperature field distribution and cooling efficiency of the outer ring under different cold air to gas flow ratios.The numerical simulation results were compared and analyzed with the experimental results.In addition,the influence of different gas inlet angle conditions on the flow heat transfer in the outer ring was numerically simulated.Results show that the numerical simulation results are in good agreement with the experimental results.The cooling efficiency results using temperature averaging at measure points are slightly higher than the experimental results.There is a clear separation and poor periodicity in the flow of the main gas flow in the outer ring test environment under the test conditions.By adding supporting elements on the sides of the outer ring block,the flow periodicity in the outer ring block area is effectively improved.When the inlet flow direction is consistent with the outlet flow direction of the gas film hole,the cold air coverage effect is better,and within a certain angle range,the impact on the cooling efficiency is relatively small.There is an optimal matching value between the inlet flow angle and the outlet flow direction of the gas film hole.

关 键 词：涡轮外环 流动换热 气膜冷却效率 数值模拟 

分 类 号：TK47[动力工程及工程热物理—动力机械及工程]