北京航空航天大学学报 ›› 2014, Vol. 40 ›› Issue (10): 1417-1423.doi: 10.13700/j.bh.1001-5965.2013.0633

• 论文 • 上一篇    下一篇

改型对剑形深波谷交变波瓣喷管射流掺混的作用

盛志强, 黄沛霖, 姬金祖, 王英   

  1. 北京航空航天大学 航空科学与工程学院, 北京 100191
  • 收稿日期:2013-11-05 出版日期:2014-10-20 发布日期:2014-10-29
  • 通讯作者: 姬金祖 E-mail:jijinzu@buaa.edu.cn
  • 作者简介:盛志强(1982-),男,江西进贤人,博士生,szq.163@163.com
  • 基金资助:

    总装预研资助项目

Effects of modification on jet mixing of sword alternating lobed nozzle

Sheng Zhiqiang, Huang Peilin, Ji Jinzu, Wang Ying   

  1. School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2013-11-05 Online:2014-10-20 Published:2014-10-29

摘要:

结合现有交变波瓣喷管的特点对基准波瓣喷管进行处理,设计了一种新型交变波瓣喷管——剑形深波谷交变波瓣喷管.采用数值方法研究了扇形处理和斜切处理对剑形深波谷交变波瓣喷管射流掺混的作用.结果显示,随着扇形处理和斜切处理各自改型程度的增加,波峰尾流区掺混速度变快,而核心区主流完全掺混所需距离略有增加.斜切处理促进掺混能力优于扇形处理,扇形处理后引射能力和流动损失基本不变,斜切处理后引射能力和流动损失稍有减小.计算结果还表明流向涡的形态对掺混效率的影响大于流向涡的强弱.

关键词: 射流掺混, 交变波瓣, 扇形处理, 斜切处理, 数值模拟

Abstract:

A novel lobed nozzle named as sword alternating lobed nozzle was designed, combined with the characteristics of the existing alternating lobed nozzles to modify the baseline lobed nozzle. The effects of scalloping and scarfing on jet mixing of sword alternating lobed nozzle were investigated by numerical method. The results show that when the degree of scalloping or scarfing enhanced, the mixing in the downstream region of the lobe peak is accelerated, however the center primary flow needs a longish journey to be mixed. Scarfing has more capacity on promoting mixing than scalloping. Pumping performance and flow loss change little with scalloping whereas decrease slightly with scarfing. The results also indicate that the form of streamwise vortices has higher influence on mixing efficiency compared with the intensity of streamwise vortices.

Key words: jet mixing, alternating lobes, scalloping, scarfing, numerical simulation

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