Numerical study on aerodynamic and infrared radiation characteristics of single expansion ramp nozzle

ZHANG Shao-li; SHAN Yong; ZHANG Jing-zhou

Chinese

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Numerical study on aerodynamic and infrared radiation characteristics of single expansion ramp nozzle

更新时间：2026-07-07

- Numerical study on aerodynamic and infrared radiation characteristics of single expansion ramp nozzle
- Vol. 26, Issue 7, (2011)
- 作者机构：
  
  南京航空航天大学能源与动力学院,南京,210016
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2011
- 稿件说明：
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ZHANG Shao-li, SHAN Yong, ZHANG Jing-zhou. Numerical study on aerodynamic and infrared radiation characteristics of single expansion ramp nozzle[J]. 2011, 26(7).
DOI：

ZHANG Shao-li, SHAN Yong, ZHANG Jing-zhou. Numerical study on aerodynamic and infrared radiation characteristics of single expansion ramp nozzle[J]. 2011, 26(7). DOI：

摘要

通过计算流体动力学/红外辐射(CFD/IR)数值模拟的方法

研究了单膨胀边倾角、喉道高度、侧壁长度和落压比(NPR)对单边膨胀喷管(SERN)气动性能和红外辐射特性的影响.研究结果表明:轴向推力系数随着单膨胀边倾斜角度增大而急剧减小

推力矢量角随着单膨胀边倾斜角度增大而增大;随着喷管落压比的增大

轴向推力系数先增大后减小

推力矢量角减小;随着喷管侧壁长度的增加

轴向推力系数可略微提高;单膨胀边对尾焰和喷管内壁有显著的遮挡作用

喷管下方的整体红外辐射仅为上方的10%左右;随着喷管落压比的增加

喷管上方的整体红外辐射降低.

Abstract

Based on computational fluid dynamics/infrared radiation (CFD/IR) numerical calculations

the effects of different structures and nozzle pressure ratio (NPR) on the aerodynamic and infrared radiation characteristics were revealed for a single expansion ramp nozzle (SERN).The results show that:with increase of ramp angle

the thrust-vector angle is enlarged and axial thrust coefficient is decreased rapidly;with increase of nozzle pressure ratio

the axial thrust coefficient increases firstly and then decreases

meantime

the thrust-vector angle reduces;as the length of sidewall increases

axial thrust coefficient improves slightly.The ramp of nozzle can significantly shield the infrared radiation of plume and inner-wall of nozzle.The radiation detected from underside of nozzle is only 10% of that from upside of nozzle.With increase of nozzle pressure ratio

the infrared radiation from underside of nozzle is reduced.

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Related Institution

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