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胡建,郑婷婷,胡好生.双级旋流器偏心对出口流场影响[J].航空动力学报,2020,(7):1447~1456
双级旋流器偏心对出口流场影响
Double-swirler misalignment effect on outlet flow field
投稿时间:2019-12-25  
DOI:10.13224/j.cnki.jasp.2020.07.012
中文关键词:  双级旋流器  限制域  扩张型流场  收缩型流场  粒子图像测速仪
英文关键词:double-swirler  limiting region  expansion field  contraction field  ,particle image velocimetry
基金项目:航空基金(2014ZB08004); 湖南省科技计划项目(2018JJ3576)
作者单位
胡建 Hunan Aviation Powerplant Research Institute,,Aero Engine Corporation of China,Zhuzhou Hunan 412002,China
 
郑婷婷 Hunan South General Aviation Engine Limited Liability Company,,Aero Engine Corporation of China,Zhuzhou Hunan 412002,China 
胡好生 Hunan Aviation Powerplant Research Institute,,Aero Engine Corporation of China,Zhuzhou Hunan 412002,China
 
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中文摘要:
      采用试验研究方法,以同一旋流器搭配不同尺寸出口限制域为对象,研究了双级旋流器偏心后,出口流场的变化规律。研究表明:当限制域边界尺寸(L)与旋流器特征尺寸(D)比值小于某个特定值时(L/D=33),旋流器出口射流与壁面存在附着点,出口流场由收缩型变为扩张型;对收缩型流场,旋流器偏心对出口流场影响较大,尤其是径向速度场分布,由无偏心时的负值(小于-4 m/s)增大至正值(大于1 m/s);对扩张型出口流场,旋流器偏心几乎不影响出口轴向、径向速度的分布及大小,如中心线的轴线速度最小值均在-44 m/s附近,径向速度最小值均-1 m/s;进行旋流器设计时,通过减小出口限制域与旋流器特征尺寸比值的方式,使出口流场呈扩张型,可有效抑制旋流器偏心对出口流场的影响。
英文摘要:
      The influence of hydrocyclone eccentricity on the outlet flow field was studied by experimental method when the same hydrocyclone was matched with different sizes of outlet limiting region. The results showed that when the ratio of the boundary size (L) to the characteristic size (D) of the hydrocyclone was less than a certain value (L/D=33), there was an attachment point between the jet at the outlet of the hydrocyclone and the wall of the hydrocyclone. The outlet flow field changed from contraction type to expansion type; for the contractile flow field, the eccentricity of the hydrocyclone had a great influence on the outlet flow field, especially the radial velocity field, the minimum value changed from -4 m/s to 1 m/s; while for the expanding outlet flow field, the eccentricity of the hydrocyclone had little effect, for example, the minimum axial velocity was around -44 m/s, and the minimum radial velocity was -1 m/s. In order to reduce the influence of hydrocyclone eccentricity, the outlet flow field can be expanded by increasing the combined swirl number and reducing the ratio of the outlet limiting region to the characteristic dimension of the hydrocyclone.
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