轴对称矢量喷管内外流场的数值模拟  

Numerical simulation on internal and external flow fields of axisymmetric vectoring nozzle

作　　者：于芳芳[1] 邓小宝[1] 马争胜[1] 姜健[1] 

机构地区：[1]中国飞行试验研究院发动机所,西安710089

出　　处：《机械设计与制造》2008年第9期146-148,共3页Machinery Design & Manufacture

基　　金：装备预先研究项目(61901080201)

摘　　要：在同一偏转角度下,随着喷管压比的增大,推力系数先减后增再减小,而矢量角先增大再减小;在相同喷管压比下,矢量角与喷管偏转角呈线性关系。利用数值计算结果和人工神经网络,建立该轴对称矢量喷管的性能预测模型,喷管性能预测结果与计算值吻合较好,从而验证了该模型的有效性,为减少计算和试验点数节省经费和时间提供了有效的途径。At the same deflective angle ,with the pressure ratio i-ncrease,the thrust coefficient was reduced at tint,then increased,and redu-cedlast,otherwise,deflective angle was increased at first,then reduced;at the same nozzle pressure ratio,deflective angle and thrust deflective angle w-ere on linear relation. Based on several numerical simulated data and the artificial neural net work,the performance model for axisymmetric vectoring nozzle was constructed. The forecasted data showed good accordance with numerical calculation results. The validity of the model is also testified. The work can be used to reduce the flight test cost and time.

关 键 词：轴对称矢量喷管 矢量角 推力系数 数值模拟 人工神经网络 

分 类 号：TH16[机械工程—机械制造及自动化] V228.7[航空宇航科学与技术—飞行器设计]