混合排气二元收敛喷管与发动机流量匹配设计方法

李娜; 吉洪湖

混合排气二元收敛喷管与发动机流量匹配设计方法

李娜,
吉洪湖

南京航空航天大学能源与动力学院,南京 210016

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- 被引次数: 0
出版历程
- 收稿日期: 2010-10-14
- 修回日期: 2011-01-10
- 刊出日期: 2011-09-28

Study on matching method for core and bypass mass flux of 2-D convergent nozzle of mixed flow

LI Na,
JI Hong-hu

College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

摘要

摘要: 发展了一种基于喷管三维黏性数值分析的内外涵气流质量流量匹配设计方法.该方法主要是通过建立以喷管待定几何参数为未知量的非线性无量纲内外涵气流质量流量匹配方程组,然后采用逐步线性迭代法结合喷管三维黏性数值分析对该非线性方程组进行求解,得到满足发动机内外涵流量匹配的喷管设计方案.通过数值算例验证分析,结果表明:①该方法可以快速确定满足涡扇发动机内外涵流量匹配要求的二元收敛喷管待定几何参数;②流量匹配后,出口面积较小、长度较长的二元收敛喷管总推力和推进效率较高.
- 二元收敛喷管 /
- 流量匹配 /
- 推力 /
- 几何参数 /
- 数值计算
Abstract: A design method of two-dimensional (2-D) convergent nozzle was developed to meet core and bypass mass flux requirements of mixed flow turbofan engine.A matching method for core and bypass mass flux based on three-dimensional (3-D) viscous numerical simulation was proposed.Non-linear dimensionless mass flux matching equations for core and bypass channel with 2-D nozzle were formulated.Solving procedure of the non-linear equations was presented.Numerical simulation and matching results for some nozzle cases indicate that : (1) The method for solving the non-linear mass flux equations is effective,geometric parameters could be determined quickly for 2-D convergent nozzle.(2) Nozzle length and throat area properly play a key role for the required nozzle gross thrust.A nozzle with greater length and smaller throat area has greater gross thrust and better efficiency.
- two-dimensional convergent nozzle /
- mass matching /
- gross thrust /
- geometric parameters /
- numerical simulation

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参考文献(16)

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