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胡伟学,王锁芳,毛莎莎.预旋喷嘴径向角度对预旋特性影响的数值研究[J].航空动力学报,2019,(1):84~91
预旋喷嘴径向角度对预旋特性影响的数值研究
Numerical study on influence of pre-swirl nozzle radial angles on pre-swirl characteristic
投稿时间:2018-02-27  
DOI:10.13224/j.cnki.jasp.2019.01.010
中文关键词:  喷嘴径向角度  预旋系统  流动特性  温降特性  比熵增
英文关键词:nozzle radial angle  pre-swirl system  flow characteristic  temperature drop characteristic  specific entropy increment
基金项目:
作者单位
胡伟学 南京航空航天大学 能源与动力学院航空发动机热环境与热结构工业和信息化部重点实验室南京 210016 
王锁芳 南京航空航天大学 能源与动力学院航空发动机热环境与热结构工业和信息化部重点实验室南京 210016 
毛莎莎 南京航空航天大学 能源与动力学院航空发动机热环境与热结构工业和信息化部重点实验室南京 210016 
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中文摘要:
      为了降低低位进气预旋流路的气动损失,针对带有不同径向角度(0°~30°)预旋喷嘴的预旋系统进行了数值仿真,并对流动特性、温降特性和比熵增特性进行了分析。结果表明:随着预旋喷嘴径向角度的增大,预旋系统无量纲温降先增大后减小,流动阻力减小,预旋系统的流量随之增大。旋转雷诺数为2.3×107时,预旋喷嘴带径向角度的预旋系统无量纲温降比传统喷嘴最大可提高18.3%,存在某一角度使预旋温降特性达到最好。预旋系统内的耗散主要发生在预旋腔和共转盘腔内,径向角度为10°时其比熵增变化量分别占整个预旋系统总体比熵增的42.4%和30.2%;合理设计预旋喷嘴的径向角度,能改善预旋腔内气流的流动效果,并且可以减少整个预旋系统的不可逆损失。
英文摘要:
      To reduce the aerodynamic loss in a low position pre-swirl system, numerical simulations were carried out to study the flow characteristics, temperature drop and specific entropy increment for pre-swirl system with nozzles radial angles from 0° to 30°. The results showed that non-dimensional temperature drop increased firstly and then decreased, and flow resistance reduced with the increasing pre-swirl nozzle radial angle bringing about the increase of mass flow rate. The non-dimensional temperature drop of pre-swirl system nozzles with radial angle most increased 18.3% than traditional nozzles when rotational Reynolds number was 2.3×107, and there was a certain angle that could lead to the best characteristics of temperature drop. The dissipative loss of the pre-swirl system mainly occurred in the pre-swirl cavity and the rotating cavity, making up 42.4% and 30.2% of the total specific entropy increment respectively when nozzles radial angle was 10°. It could improve the flow effects in pre-swirl cavity and reduce the loss of pre-swirl system if the nozzles radial angle was designed properly.
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