水汽比对涡轮预旋供气系统温降影响的数值分析  

Numerical Analysis of the Effect of Water to Steam Ratio on Temperature Drop of a Turbine Pre-swirl Air Supply System

作　　者：王家友 邓明春 周建军 刘高文[2] WANG Jia-you;DENG Ming-chun;ZHOU Jian-jun;LIU Gao-wen(Shenyang Engine Research Institute,Aero Engine Corporation of China,Shenyang,China,Post Code:110015;School of Power and Energy,Northwestern Polytechnical University,Xi′an,China,Post Code:710072)

机构地区：[1]中国航发沈阳发动机研究所,辽宁沈阳110015 [2]西北工业大学动力与能源学院,陕西西安710072

出　　处：《热能动力工程》2024年第1期158-164,共7页Journal of Engineering for Thermal Energy and Power

基　　金：航空发动机及燃气轮机基础科学中心项目(P2022-A-II-007-001)。

摘　　要：为了揭示喷水冷却所引起湿空气环境对涡轮供气系统温度的影响,基于欧拉-拉格朗日多相流颗粒追踪方法,在预旋供气系统进口总压150 kPa和总温450 K条件下,开展湿空气对预旋供气系统温降的影响程度评估,分析预旋供气系统内旋转比和预旋喷嘴流量系数的变化规律,揭示预旋供气系统温降的影响规律。结果表明:在水汽比由0增加到0.3时,水汽比变化对预旋喷嘴内流动和温度变化影响显著,预旋喷嘴的气流旋转比由1.36增加到1.43,而其压比由1.523降低到1.482、流量系数由0.97降低到0.90,从而使预旋喷嘴温降由25.79 K减小到22.28 K;预旋供气系统温降由12.07 K降低到11.03 K。含湿条件会增加系统内流动阻力,限制了预旋供气系统降温能力,在涡轮叶片供气温度需求不变时,含湿条件将需要更高的供气压力。To reveal the influence of the wet air conditions caused by water injection pre-cooling on the temperature of the turbine air supply system,this paper focused on the influence evaluation of wet air on the temperature drop of pre-swirl air supply system under the conditions of total pressure of 150 kPa and total temperature of 450 K at the inlet of the pre-swirl air supply system based on Euler-Lagrangian multiphase flow particle tracking method.The variation laws of both swirl ratio of the system and flow coefficient of pre-swirl nozzle were analyzed in detail.The influence law of temperature drop of the pre-swirl air supply system was revealed.Results show that the water to steam ratio has a significant effect on the flow and temperature in pre-swirl nozzle as the water to steam ratio increases from 0 to 0.3.The airflow swirl ratio of pre-swirl nozzle increases from 1.36 to 1.43,while its pressure ratio decreases from 1.523 to 1.482,and its flow coefficient drops from 0.97 to 0.90,thus reducing the temperature drop of pre-swirl nozzle form 25.79 K to 22.28 K;in particular,the temperature drop of pre-swirl air supply system is reduced from 12.07 K to 11.03 K.It can be concluded that the flow resistance in the system will increase under the system inlet conditions with humidity so as to limit the cooling ability of the pre-swirl air supply system.Therefore,the air supply pressure of the system will be required higher at the humidity conditions when the air supply temperature of the turbine blade is constant.

关 键 词：燃气涡轮发动机 预旋供气系统 水汽比 旋转比 温降 

分 类 号：V235.1[航空宇航科学与技术—航空宇航推进理论与工程]