矢量偏转对轴对称喷管性能的影响  

Effect of Vectoring Deflection on Performance of Axisymmetric Nozzle

作　　者：于芳芳[1] 邓小宝[1] 马争胜[1] 李冰[1] 

机构地区：[1]中国飞行试验研究院发动机所,陕西西安710089

出　　处：《航空计算技术》2008年第3期52-55,共4页Aeronautical Computing Technique

摘　　要：采用有限体积法对不同偏转角和不同压比下的三维轴对称矢量喷管内外湍流流场进行数值模拟,结果表明:在相同压比下,轴对称喷管各性能参数与喷管偏转角基本成线性关系,并且在不同压比下偏转角对性能参数的影响不同,在小压比工况下偏转角对性能参数的影响大于大压比工况;在同一偏转角度下,随着喷管压比的增大,推力系数呈现出先减小后增大再减小的趋势,而矢量角却增大后减小。利用最小二乘曲面拟合技术,建立了该轴对称矢量喷管性能的数学模型,确定了各性能参数与压比及偏转角的多项式函数关系,逼近精度较高,具有一定的工程应用价值。The numerical simulation has been conducted with finite volume scheme to study the internal and external flow fields of 3D axisymmetric vectoring nozzle at different deflective angle and nozzle pressure ratio. The result indicated the relationship between vectoring deflection and the performance. Based on several numerical simulated data and least squares surface fitting theory, the mathematic performance model for axisymmetric vectoring nozzle was constructed, and the relation function was determined, and have a better approximation accuracy, so the performance model was good at utilized prospect.

关 键 词：轴对称矢量喷管 矢量角 数值模拟 曲面拟合 

分 类 号：V228.7[航空宇航科学与技术—飞行器设计]