Influence of pulsating frequencies on characteristic of radial turbine rotor inlet flow

被引：0
|
作者：
Wang Z. [1 ,2 ]
Ma C. [1 ]
Zhu F. [1 ]
机构：
[1] School of Mechanical Engineering, Beijing Institute of Technology, Beijing
[2] Department of Mechanics, Jinzhong University, Jinzhong
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2021年 / 36卷 / 03期
关键词：
Flow angle; Pulsating flow; Pulsating frequency; Radial variable nozzle turbine; Rotor inlet;
D O I：
10.13224/j.cnki.jasp.2021.03.020
中图分类号：
学科分类号：
摘要：
Detailed understanding of the flow interaction within the complex geometry of turbine stage coupled with the imposed unsteady pressure waves was presented. A fully validated numerical model was established based on ANSYS CFX code. For this purpose, four unsteady simulations of 20, 40, 60 and 80Hz together with the steady state simulations were conducted. The flow angle distribution in a pulsating cycle and at the circumferential and spanwise positions was analyzed in different pulsating frequency conditions. The results showed that the pulsating frequency mainly affected the inlet incidence angle of rotor at the high pressure side, moreover, the lower the pulse frequency, the greater the negative incident angle of the low pressure side. It was also found that the absolute flow angle distribution at circumferential potion was similar and the relative flow angle fluctuations during the pressure decrements instances was significantly lower as compared with that during pressure increment instances. © 2021, Editorial Department of Journal of Aerospace Power. All right reserved.
引用
收藏
页码：646 / 654
页数：8
相关论文
共 20 条
  • [1] WATSON N, JANOTA M S., Turbocharging the internal combustion engine, (1982)
  • [2] JAPIKSE D, BAINES N C., Introduction to turbomachinery, (1994)
  • [3] KARAMANIS N, MARTINEZ-BOTAS R F, SU C C., Mixed flow turbines: inlet and exit flow under steady and pulsating conditions, Journal of Turbomachinery, 123, 2, pp. 359-371, (2000)
  • [4] KARAMANIS N, MARTINEZ-BOTAS R F., Mixed-flow turbines for automotive turbochargers: steady and unsteady performance, International Journal of Engine Research, 3, 3, pp. 127-138, (2002)
  • [5] YU Liguo, MA Chaochen, SHI Xin, Et al., Experimental investigation on vehicular turbocharger turbine characteristics under unsteady flow condition, Chinese Internal Combustion Engine Engineering, 31, 5, pp. 36-40, (2010)
  • [6] PALFREYMAN D, MARTINEZ-BOTAS R F., The pulsating flow field in a mixed flow turbocharger turbine: an experimental and computational study, Journal of Turbomachinery, 127, 1, pp. 144-155, (2005)
  • [7] COSTALL A, MARTINEZ-BOTAS R F, PALFREYMAN D., Detailed study of pulsating flow performance in a mixed flow turbocharger turbine, (2005)
  • [8] YANG Mingyang, DENG Kangyao, MARTINES-BOTAS R, Et al., An investigation on unsteadiness of a mixed-flow turbine under pulsating conditions, Energy Conversion and Management, 110, pp. 51-58, (2016)
  • [9] PADZILLAH M H, RAJOO S, MARTINEZ-BOTAS R F., A detailed comparison on the influence of flow unsteadiness between the vaned and vaneless mixed-flow turbocharger turbine, Journal of Engineering for Gas Turbines and Power, 140, 4, (2018)
  • [10] LEE S P, REZK A, JUPP M L., The influence of pulse shape on the performance of a mixed flow turbine for turbocharger applications, International Journal of Mechanical Engineering and Robotics Research, 7, 2, pp. 136-142, (2018)
12