叶型接受孔耦合叶轮结构优化对涡轮预旋供气系统性能改进研究  

Structural Optimization of Blade-shaped Receiver Hole Coupled With Impeller on Turbine Pre-swirl System for Performance Improvement

作　　者：白杨 赵义祯 张林 薛永建 林阿强 刘高文[1] BAI Yang;ZHAO Yizhen;ZHANG Lin;XUE Yongjian;LIN Aqiang;LIU Gaowen(School of Power and Energy,Northwestern Polytechnical University,Xi’an 710129,Shaanxi Province,China;Shenyang Engine Research Institute,Aero Engine Corporation of China,Shenyang 110015,Liaoning Province,China)

机构地区：[1]西北工业大学动力与能源学院,陕西省西安市710129 [2]中国航发沈阳发动机研究所,辽宁省沈阳市110015

出　　处：《中国电机工程学报》2023年第15期5943-5954,共12页Proceedings of the CSEE

基　　金：国家科技重大专项(2017-Ⅲ-0011-0037);中央高校基本科研业务费专项资金项目(3102021OQD701)。

摘　　要：预旋供气系统为燃气涡轮转子叶片提供高品质冷气。为改进预旋供气系统温降性能,基于预旋供气系统数学模型的理论推导,揭示出原模型温降性能不显著的影响机制和解决方法,提出一种动叶前缘式进口的叶型接受孔的优化模型,并评估优化前后预旋供气系统的热力学和气动特性。结果表明,预旋腔内转静部件匹配问题是影响系统性能的一个重要限制因素,动叶前缘式接受孔能够解决转静难以匹配的问题。在满足供气流量和供气压力的条件下,采用动叶前缘式接受孔的优化模型预旋腔压力由原模型的640.2kPa降至533.0kPa,降低了16.7%。系统温变由温升转为温降,温降效率由-30%增加至55%,温降变化范围达13.56K。比功耗由6720 J/kg降至3979J/kg,下降了40.8%。A pre-swirl system can provide high-quality cooling air for gas turbine blades.In order to improve the temperature drop performance of the pre-swirl system,the influence mechanism and solution scheme are proposed to reveal the insignificant temperature drop of the original model by theoretical derivations.A blade-shaped leading-edge receiver hole is designed to enhance the system performance.Furthermore,the thermodynamic and aerodynamic characteristics are compared for the systems using the blade-shaped receiver hole and the original receiver hole,respectively.The results show that the matching of rotor and stator parts in the pre-swirl cavity is an important factor influencing the system performance.The blade-shaped receiver hole can better solve the matching problem.Compared with the system using the original receiver hole,the pre-swirl cavity pressure of the system with blade-shaped receiver hole is reduced from 640.2 kPa to 533.0 kPa under the condition of the specific mass flow rate and pressure of the supplied air,which is decreased by 16.7%.The system using the blade-shaped receiver hole has the positive system temperature drop,the temperature drop efficiency increases from-30%to 55%,and the range of temperature drop is 13.56 K.The specific power consumption decreases by 40.8%from 6720 J/kg to 3979 J/kg.

关 键 词：涡轮空气系统 预旋供气系统 温降 比功耗 旋转比 叶型接受孔 

分 类 号：TM62[电气工程—电力系统及自动化]