Numerical investigation of geometric parameters' influence to aerodynamic performance of two dimensional convergent and divergent nozzle

SHI Xiao-juan; JI Hong-hu; SI Ren

doi:10.13224/j.cnki.jasp.2016.08.002

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Numerical investigation of geometric parameters' influence to aerodynamic performance of two dimensional convergent and divergent nozzle

更新时间：2026-07-07

- Numerical investigation of geometric parameters' influence to aerodynamic performance of two dimensional convergent and divergent nozzle
- Vol. 31, Issue 8, Pages: 1799-1810(2016)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.13224/j.cnki.jasp.2016.08.002
  CLC：
- Published：2016
- 稿件说明：
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施小娟, 吉洪湖, 斯仁. 二元收扩喷管设计参数对气动性能影响的数值研究[J]. 航空动力学报, 2016, 31(8): 1799-1810.

doi: 10.13224/j.cnki.jasp.2016.08.002
施小娟, 吉洪湖, 斯仁. 二元收扩喷管设计参数对气动性能影响的数值研究[J]. 航空动力学报, 2016, 31(8): 1799-1810. DOI： 10.13224/j.cnki.jasp.2016.08.002.

doi: 10.13224/j.cnki.jasp.2016.08.002 DOI：

摘要

采用正交试验设计方法进行喷管气动性能数值模拟算例的设计，综合研究了二元收扩喷管8个设计参数对气动性能的影响，研究的设计参数包括圆到矩超椭圆型面过渡段几何参数（长径比、横截面积变化率、长半轴变化率、短半轴变化率）和主喷管段几何参数（喉部宽高比、喉部型面半径比、收敛半角、扩张半角），并且对喉部宽高比、喉部型面半径比、收敛半角、扩张半角等4个参数对喷管气动性能影响的灵敏度进行了分析.结果表明：喉部型面半径比RW/R8是二元收扩喷管气动性能影响的最主要参数，因此在喷管设计中应尽量增大RW/R8，尤其是在收敛半角α较大时，增大RW/R8可使喷管气动性能明显增大；喉部宽高比不是二元收扩喷管气动性能影响的主要参数；二元收扩喷管的气动性能几乎与过渡段型面无关.

Abstract

The computational cases were designed using the orthogonal experiment design method. The effect of eight geometric parameters on the aerodynamic performance of two dimensional convergent and divergent (2D-CD) nozzle was investigated. The geometric parameters studied include length to diameter ratio

cross-sectional area change rate

long half shaft rate

short half shaft rate of the super elliptic transition section

and throat width to height ratio

throat radius ratio

convergence half angle

divergent half angle of primary nozzle. The sensitivity analysis of throat aspect ratio

throat radius ratio

convergent half angle

divergent half angle on aerodynamic performance was performed. The results show that throat radius ratio is the main parameter of 2D-CD nozzle's aerodynamic performance

therefore the throat radius ratio should be increased in the 2D-CD nozzle design

especially when the convergent half angle is larger. Width to height ratio of throat is not a major parameter of 2D-CD nozzle's aerodynamic performance. The aerodynamic performance of 2D-CD nozzle is independent of transition duct.

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