Influences of the Downwash Flow from a Helicopter Rotor on the Performances of an Infrared Suppressor

WANG Xian-wei; HUANG Yong; LU Yu-xia

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Influences of the Downwash Flow from a Helicopter Rotor on the Performances of an Infrared Suppressor

更新时间：2026-07-07

- Influences of the Downwash Flow from a Helicopter Rotor on the Performances of an Infrared Suppressor
- Vol. 18, Issue 6, (2003)
- 作者机构：
  
  北京航空航天大学航空发动机气动热力重点实验室,北京,100083
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2003
- 稿件说明：
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WANG Xian-wei, HUANG Yong, LU Yu-xia. Influences of the Downwash Flow from a Helicopter Rotor on the Performances of an Infrared Suppressor[J]. 2003, 18(6).
DOI：

WANG Xian-wei, HUANG Yong, LU Yu-xia. Influences of the Downwash Flow from a Helicopter Rotor on the Performances of an Infrared Suppressor[J]. 2003, 18(6). DOI：

摘要

利用地面模拟试验件实验研究了直升机旋翼下洗气流对红外抑制器气动及红外隐身性能的影响。结果表明

旋翼下洗气流对红外抑制器的气动性能、特征温度、红外辐射等都有明显的影响。旋翼下洗气流速度的增加

将造成红外抑制器的引射系数降低

出口气流温度升高

出口气流温度分布均匀度增加

并使整流罩及外套特征温度迅速增加。存在一个最佳旋翼下洗气流速度

使储物仓特征温度最低。最终

使得在模拟悬停状态下

考虑和不考虑旋翼下洗气流相比

3～5μm的平均红外辐射强度大约增加35%。

Abstract

Experimental diagnostic study has been performed

and results show that the downwash flow had remark able impacts on the aerodynamic performances

characteristic temperatures

and infrared radiation.With the increase in the downwash flow velocity

the entrainment coefficient decreased

and the exhaust flow temperature increased

resulting in the rapid increases of the exhausting duct temperature and the suppressor surface temperature.And finally

the downwash flow at hovering condition caused an increase of total infrared radiation between 3～5 μm by about 35%.

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Related Institution

School of Jet Propulsion, Beijing University of Aeronautics and Astronautics

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南京航空航天大学能源与动力学院

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

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