Influence of Wake Sweeping Frequency on the Unsteady Flow Characteristics of an Integrated Aggressive Interturbine Duct

Author:

Lei Zhijun,Sun Shuang,Li Gang,Liu Hongrui,Ouyang Xiaoqing,Zhang Yanfeng,Lu Xingen,Xu Gang,Zhu Junqiang

Abstract

A dynamic simulation was launched to research the influence of high-pressure turbine (HPT) rotor wake passing frequency on the flow mechanism in an integrated aggressive interturbine duct (AITD). Sweeping rods were adopted to replace the HPT rotors to decouple the influence of its wake from those of other secondary flows. The diameter of the rods (d/s, nondimensionalized by the pitch (s) of the integrated struts at midspan) was 0.10, and their reduced frequency (f) ranged from 0.49 to 1.61. The k–ω SST turbulence model and γ–θ transition model were adopted for the turbulence closure. A 6.3-million-node structured grid was used to meet the grid dependency. Along with increasing f, the intensified circumferential motion of the wake (1) enhances the wake vortex stretching and exhaustion near the hub; (2) promotes the radial inclination of wakes and elongates and narrows the wake vortex band, resulting in increased spacing between the adjacent wake vortices and the weakened vortex interaction. In the high-f cases, the enhanced turbulence intensity in the interval between the adjacent wakes could suppress the separation bubble on LPT-GV in advance, but the elongated and narrowed wake vortices resulted in a substantial reduction in the radial extent and duration of their suppression on the separation bubble. Therefore, the influence of f on the integrated AITD and its parts was bidirectional, and adjusting the sweeping frequency to balance its positive and negative effects could minimize the total loss in the integrated AITD.

Funder

National Natural Science Foundation of China

National Science and Technology Major Project

Publisher

MDPI AG

Subject

Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science

Reference31 articles.

1. The Influence of Blade Wakes on the Performance of Inter-turbine Diffusers;Dominy;J. Turbomach.,1996

2. Flow Development through Inter-turbine Diffusers;Dominy;J. Turbomach.,1998

3. Zhang, X., Hu, S., Benner, M., Gostelow, P., and Vlasic, E. (2010, January 12–18). Experimental and Numerical Study on an Inter-turbine Duct. Proceedings of the ASME 2010 International Mechanical Engineering Congress and Exposition, Vancouverm, BC, Canada. Paper No.: IMECE2010-37322.

4. Miller, R.J., Moss, R.W., Ainsworth, R.W., and Harvey, N.W. (2003, January 16–19). The Development of Turbine Exit Flow in a Swan-Necked Inter-stage Diffuser. Proceedings of the ASME Turbo Expo 2003: Power for Land, Sea, and Air, Atlanta, GA, USA. Paper No.: GT2003-38174.

5. Effects of Area Ratio and Mean Rise Angle on the Aerodynamics of Inter-Turbine Ducts;Zhang;J. Turbomach.,2018

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3