射流分配对喉道气动偏转矢量喷管的影响

周敏; 王如根; 张相毅; 徐学邈

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射流分配对喉道气动偏转矢量喷管的影响
周敏¹, 王如根², 张相毅³, 徐学邈⁴
1.空军工程大学工程学院陕西西安710038;2.空军工程大学工程学院陕西西安710039;3.空军工程大学工程学院陕西西安710040;4.空军工程大学工程学院陕西西安710041

摘要:

采用基于雷诺平均的二维N-S方程和RNGk-ε湍流模型对二元喷管喉道气动偏转矢量控制时的流场进行了数值模拟,计算结果表明在小扩张比、短扩散段喷管上,在喉道气动偏转矢量控制方案下主流可以实现亚声速偏转。在此基础上数值分析了喉部和扩散段射流流量的分配对喷管流场的影响,研究表明要获得更大的推力矢量角,应该将更多的流量分配在扩散段射流缝处,经过计算得到较佳的扩散段射流流量和喉部射流流量分配比例大约为3∶1。

关键词: 喉道气动偏转+ 射流分配推力矢量喷管流场

DOI：

分类号:V233

基金项目:

Effect of jet flow distribution on fluidic throat skewing nozzle

ZHOU Min¹, WANG Ru-gen², ZHANG Xiang-yi³, XU Xuemiao⁴

1.Engineering Inst.,Air Force Engineering Univ.,Xi’an 710038,China;2.Engineering Inst.,Air Force Engineering Univ.,Xi’an 710039,China;3.Engineering Inst.,Air Force Engineering Univ.,Xi’an 710040,China;4.Engineering Inst.,Air Force Engineering Univ.,Xi’an 710041,China

Abstract:

Different convergent-divergent nozzle flow fields were calculated with 2D Reynolds average N-S equation by the finite volume method and RNG k-ε turbulence model.The results show that the subsonic turning is achieved on the small nozzle expansion area ratios and short nozzle flap lengths.Based on these results,the effect of jet flow distribution on the throat and flap length were further analyzed.To get more thrust vector angle,more jet flow should be distributed to the slot on the flap length,and better jet flow distribution ration on the flap length and throat is 3:1.

Key words: Fluidic throat skewing+ Jet flow distribution Thrust vectoring Nozzle flow field