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风兜面积对气冷喷油杆性能影响的数值研究

刘友宏 王晓博

刘友宏, 王晓博. 风兜面积对气冷喷油杆性能影响的数值研究[J]. 航空动力学报, 2016, 31(2): 337-344. doi: 10.13224/j.cnki.jasp.2016.02.011
引用本文: 刘友宏, 王晓博. 风兜面积对气冷喷油杆性能影响的数值研究[J]. 航空动力学报, 2016, 31(2): 337-344. doi: 10.13224/j.cnki.jasp.2016.02.011
LIU You-hong, WANG Xiao-bo. Numerical analysis on effect of cooling air pocket area on performance of air-cooled fuel injector[J]. Journal of Aerospace Power, 2016, 31(2): 337-344. doi: 10.13224/j.cnki.jasp.2016.02.011
Citation: LIU You-hong, WANG Xiao-bo. Numerical analysis on effect of cooling air pocket area on performance of air-cooled fuel injector[J]. Journal of Aerospace Power, 2016, 31(2): 337-344. doi: 10.13224/j.cnki.jasp.2016.02.011

风兜面积对气冷喷油杆性能影响的数值研究

doi: 10.13224/j.cnki.jasp.2016.02.011
详细信息
    作者简介:

    刘友宏(1963-),男,江苏东台人,教授、博士生导师,博士,主要从事发动机气动热力等方面研究.

  • 中图分类号: V231.1

Numerical analysis on effect of cooling air pocket area on performance of air-cooled fuel injector

  • 摘要: 以某型涡扇发动机加力燃烧室气冷喷油杆为研究对象,在梯形截面的风兜下底和高度不变的情况下,通过改变上底长度得到一系列不同风兜面积的几何模型,综合考虑外流场对气冷喷油杆内部流动和换热特性的影响,对其在巡航状态下进行了流/热/固耦合三维数值模拟研究,获得了不同风兜面积对气冷喷油杆引气率、冷却空气喷口流量分布、壁面平均冷却效果、壁面最高温度的影响规律.结果表明:引气率随风兜面积增大线性增大;喷油嘴凸台周围冷却空气喷口的流量沿气冷喷油杆内冷却空气流向呈二次曲线规律变化,且随风兜面积增大分布趋于均匀;随风兜面积增大,喷油杆、隔热套壁面平均冷却效果线性增大,壁面最高温度降低;有效抑制内涵高温燃气倒灌进入隔热套是避免喷油杆局部高温的关键.

     

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出版历程
  • 收稿日期:  2014-06-23
  • 刊出日期:  2016-02-28

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