摘要
为了更好地了解脉冲进气参数对非对称双通道涡轮(asymmetrical twin-scroll turbine,ATST)性能的影响,应用ANSYS CFX软件对不同脉冲进气条件下的ATST进行了非稳态数值计算,探究了进气脉冲频率和幅值对ATST性能的影响,并进一步分析了脉冲频率和幅值对蜗壳出口参数、转子进口参数及内部流场的影响。研究结果表明:脉冲频率不同使得涡轮性能参数发生了一定的相移,但是对其周期内的平均性能影响较小;脉冲幅值对ATST的瞬态和平均性能都有较大影响,较大脉冲幅值对应的平均流量参数和效率分别下降了5.69%和0.48%,且转子进口入射角和蜗壳出口总压损失系数明显升高。
To better understand the influence of pulse intake parameters on the performance of asymmetric twin-scroll turbine(ATST),ANSYS CFX software was applied to perform unsteady numerical calculation of ATST under different pulse frequency and amplitude intake conditions.The influence of intake pulse frequency and amplitude on ATST performance was explored,and the influences of pulse frequency and amplitude on volute outlet parameters,rotor inlet parameters and internal flow field were further analyzed.The research results show that different pulse frequencies cause certain differences in turbine performance parameters,but have little impact on the average performance during the cycle.The pulse amplitude has great influence on the transient and average performance of ATST.The average flow parameter and efficiency corresponding to the larger pulse amplitude decrease by 5.69%and 0.48%respectively,and the incidence angle at the rotor inlet and the total pressure loss coefficient at the volute outlet obviously increase.
作者
王智慧
刘湘
王宏波
WANG Zhihui;LIU Xiang;WANG Hongbo(Department of Mechanics,Jinzhong University,Jinzhong 030619,China;Ningbo Weifu Tianli Turbocharging Technology Co.,Ltd.,Ningbo 315000,China)
出处
《车用发动机》
北大核心
2025年第4期29-35,共7页
Vehicle Engine
基金
山西省青年科学研究项目(20210302123357)。
关键词
脉冲频率
脉冲幅值
非对称双通道涡轮
入射角
总压损失系数
pulse frequency
pulse amplitude
asymmetric twin-scroll turbine
incidence angle
total pressure loss coefficient
