摘要
为了更好地了解脉冲频率对双通道涡轮转子进口流动特性的影响,应用ANSYS CFX软件对不同频率(20、40、80 Hz)脉冲进气条件下的双通道径向涡轮进行了非稳态数值计算,探究了进气脉冲频率对双通道涡轮转子进口入射角的影响,并进一步分析了脉冲频率对转子下游流场的影响。结果表明:脉冲频率对转子进口入射角的影响较大,一个脉冲周期内,转子进口入射角出现两个波峰和两个波谷,波峰附近入射角随频率升高而减小,波谷附近入射角随频率升高而增大;入射角沿叶高分布规律可以发现,叶根部分和叶高部分入射角随频率变化趋势相反,另外,叶根分支进口压力更大时,双通道涡轮进口流动特性更稳定。
In order to better understand the impact of pulse frequency on the flow characteristics of the twin entry turbine rotor inlet,ANSYS CFX software was applied to numerical calculation of twochannel radial turbines with different frequencies(20,40,80 Hz)under the condition of pulse intake,while the distribution law of rotor inlet incidence angle in one pulse period,and the distribution law of blade height and circumferential direction were obtained.The results showed that in one pulse period,there were two peaks and two troughs in the incidence angle of the rotor inlet,the incidence angle near the crest decreased with the increase of frequency,and the incidence angle near the trough increased with the increase of frequency.The incidence angle distribution along the blade height took 0.5 blade height as the dividing point,and the incidence angle of the blade root part and the blade height part presented an opposite trend with the frequency.When the inlet pressure of blade root branch was larger,the inlet flow characteristics of twin entry turbines were more stable.
作者
王智慧
卫海桥
王宏波
毕金光
WANG Zhihui;WEI Haiqiao;WANG Hongbo;BI Jinguang(School of Mechanical Engineering,Tianjin University,Tianjin 300072,China;Ningbo Weifu Tianli Turbocharging Technology Company,Limited,Ningbo Zhejiang 315000,China)
出处
《航空动力学报》
北大核心
2025年第3期405-413,共9页
Journal of Aerospace Power
基金
山西省高等学校科技创新项目(2021L499)
山西省青年科学研究项目(20210302123357)。
关键词
脉冲进气
脉冲频率
双通道涡轮
入射角
转子进口
pulse flow
pulse frequency
twin entry radial turbine
incidence angle
rotor inlet
