某型空冷高温涡轮叶片传热特性的数值研究  

Numerical Study of Heat Transfer Characteristics of a Certain Type of Air-cooled High-temperature Turbine Blade

作　　者：赵振[1] 席雷 高建民[1] 徐亮[1] 李云龙[1] ZHAO Zhen;XI Lei;GAO Jian-min;XU Liang;LI Yun-long(State Key Laboratory for Manufacturing Systems Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]西安交通大学机械制造系统工程国家重点实验室,陕西西安710049

出　　处：《节能技术》2023年第5期387-392,共6页Energy Conservation Technology

基　　金：国家自然科学基金资助项目(51876157);陕西省自然科学基础研究计划青年项目(2022JQ-545);中国博士后科学基金资助项目(2021M702573)。

摘　　要：为了揭示叶片冷却的机理,并丰富和补充叶片的实验研究,对某型空冷高温涡轮叶片的传热特性进行了数值研究。采用实验数据对数值模型进行了验证,数值探究了主流出口压力、进/出口压比、冷气与主流温度比及流量比对叶片传热特性的影响规律,并采用响应面模型拟合得到有关叶片平均冷却效率和温度非均匀度的经验公式。结果表明:采用流-固耦合传热的数值方法能够准确地模拟叶片通道的传热特性;叶片的平均冷却效率随着主流出口压力的增大而降低,随着主流进/出口压比、冷气与主流温度比和流量比的增大而增大;主流出口压力、进/出口压比和冷气与主流温度比均会降低叶片的温度非均匀度,而流量比会增大叶片的温度非均匀度;采用响应面模型拟合得到的经验公式有较高的精度。In order to reveal the mechanism of blade cooling and to enrich and supplement the experimental study of the blade,the heat transfer characteristics of a certain type of air-cooled high-temperature turbine blade were studied numerically.The experimental data were used to verify the numerical model,and the influence laws of the main stream outlet pressure,pressure ratio of inlet and outlet,cold gas to mainstream temperature ratio and flow rate ratio on the heat transfer characteristics of the blade were numerically studied,and the empirical equations about the average cooling efficiency and temperature non-uniformity of the blade were obtained by fitting the response surface model.The results show that the numerical method of fluid-solid coupling heat transfer can accurately simulate the heat transfer characteristics of the blade channel;the average cooling efficiency of the blade decreases with the increase of the mainstream outlet pressure,and increases with the increase of the mainstream pressure ratio of inlet and outlet,cold gas to mainstream temperature ratio and flow rate ratio;the mainstream outlet pressure,pressure ratio of inlet and outlet and cold gas to main stream temperature ratio all decrease the temperature non-uniformity of the blade,while the flow rate ratio will increase the temperature non-uniformity of the blade;the empirical equation obtained by fitting the response surface model has a high accuracy.

关 键 词：涡轮叶片 传热特性 关联式拟合 数值研究 

分 类 号：TK47[动力工程及工程热物理—动力机械及工程]