气膜孔排布对排气系统中心锥冷却和红外辐射特性的影响

王旭; 张靖周; 单勇

doi:10.13224/j.cnki.jasp.2016.04.009

气膜孔排布对排气系统中心锥冷却和红外辐射特性的影响

doi: 10.13224/j.cnki.jasp.2016.04.009

南京航空航天大学能源与动力学院江苏省航空动力系统重点实验室, 南京 210016

基金项目:

国家自然科学基金(51306088)

江苏省自然科学基金(BK20130790)

详细信息

作者简介:
王旭(1990-),男,河北秦皇岛人,硕士生,主要从事红外抑制、传热与燃烧研究.

中图分类号: V231.3
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- 文章访问数: 873
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- 被引次数: 0
出版历程
- 收稿日期: 2014-08-10
- 刊出日期: 2016-04-28

Effects of film hole arrangement on central-cone cooling and infrared radiation characteristics of exhaust system

Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing Univerisity of Aeronautics and Astronautics, Nanjing 210016, China

摘要

摘要: 运用计算流体力学/红外辐射(CFD/IR)的数值模拟方法,以涡扇发动机排气系统为原型,对中心锥表面气膜冷却方案进行了数值研究,并揭示了中心锥冷却对红外辐射特征的作用效果.研究表明:气膜冷却中心锥可有效降低中心锥表面的温度,抑制排气系统在0°~15°范围内的红外辐射.在所研究的诸多方案中,与无冷却的涡扇排气系统相比,中心锥表面温度可以降低282K,0°方向上可降低总体红外辐射约57%.
- 涡扇发动机 /
- 排气系统 /
- 中心锥冷却 /
- 气膜冷却 /
- 红外辐射
Abstract: The axisymmetric convergent-expansion nozzle exhaust system of a certain turbofan engine was taken as a prototype wherein the film cooling schemes on the central-cone surface were numerically investigated by CFD/IR methods. The cooling schemes were compared and the cooling action of central-cone surface on the infrared radiation characteristics was revealed. The results show that the film cooling on the central-cone surface could effectively decrease the surface temperature, and suppress the infrared radiation intensity between 0 degree and 15 degree viewed from backward direction. The best cooling scheme achieved about 282K decrease on the central-cone surface as well as 57% relative decrease of infrared radiation intensity on 0 degree direction by comparing with the prototype exhaust system.
- turbofan engine /
- exhaust system /
- central-cone cooling /
- film cooling /
- infrared radiation

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参考文献(18)

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