导叶安装角和稠度对向心涡轮气动性能影响的研究  

Research on the Effect of Guide Vane Installation Angle and Solidity on the Aerodynamic Performance of Radial Turbine

作　　者：黄鸿均 刘汉儒[1] 张霖 王世广 王掩刚[1] Hong-jun Huang;Han-ru Liu;Lin Zhang;Shi-guang Wang;Yan-gang Wang(School of Power and Energy,Northwestern Polytechnical University)

机构地区：[1]西北工业大学动力与能源学院

出　　处：《风机技术》2024年第4期14-23,共10页Chinese Journal of Turbomachinery

基　　金：中央高校基本科研业务费(D5000210924)。

摘　　要：为探索导叶安装角和稠度对涡轮性能和流动损失的影响,本文基于NASA科技报告中的紧凑型开式向心涡轮几何,采用数值模拟分析研究了不同导叶安装角开度不同和不同导叶稠度条件下的向心涡轮气动特性的变化规律。结果表明:在导叶安装角的变化过程中,导叶开度增大,导叶排通流面积增加,向心涡轮流量增大,但气流在导叶进口处攻角变大,导致冲击碰撞产生更多局部损失;随着导叶开度减小,流道收敛度增加,气流拥有更大的膨胀比和出口速度,提高了气流在动叶进口的做功能力,速度增加的同时减弱了通道涡的局部损失。在设计工况下89.8%~107%设计通流面积的调节范围内,增大叶片稠度使得导叶通流面积减少、收敛度增加,气流在获得高膨胀比和气流速度的同时气体流量显著减少,损失了部分涡轮输出功。In order to explore the effects of guide vane installation angle and solidity on the performance and flow losses of turbine,the variation rules of performance and aerodynamic characteristics of radial turbines with different guide vane opening degree and solidity were numerical simulated based on guide vane configuration in NASA science and technology report.The results show that the opening degree of the guide vane increases.The flow area of the guide vane and the flow rate increases.The attack angle at the inlet of the guide vane increases too,resulting in more local losses.With the decrease of the opening degree,the convergence of the guide vane increases,and the airflow has a larger expansion ratio and outlet velocity of the guide vane,which improves the power of the airflow at the inlet of the guide vane,and weakens the local loss of the passage vortex while the speed increases.Under the 89.8%~107%of design flow,the increase of guide vane solidity leads to the decrease of flow area and the increase of convergence of guide vane,and the flow rate significantly decreases while the flow achieves high expansion ratio and high velocity,and part of turbine output power is lost.

关 键 词：向心涡轮 进口导叶 安装角 导叶稠度 气动性能 流动损失 

分 类 号：TK14[动力工程及工程热物理—热能工程]