某型分排涡扇发动机尾喷管特性影响参数研究  

Research on Influencing Parameters of Jet Nozzle Characteristic of a Certain Type of Turbofan Engine

作　　者：李新建[1] 齐海帆[1] 潘鹏飞[1] 

机构地区：[1]中国飞行试验研究院,陕西西安710089

出　　处：《工程与试验》2016年第1期36-40,84,共6页Engineering and Test

摘　　要：采用数值计算方法,研究了主要气动参数对某型分开排气涡扇发动机尾喷管流动特性的影响情况,获得了环境压力、飞行马赫数、外/内涵总压比、落压比等单个气动参数改变对尾喷管流量系数和推力系数的影响规律。其中,落压比的影响最大,飞行马赫数的影响次之,环境压力的影响较小,外/内涵总压比对内涵道流动特性的影响较小、对外涵道流动特性的影响可以忽略。The numerical calculation method is used in the paper to study the influencing parameters of jet nozzle characteristic of an unmixed flow turbofan engine. The trend laws are obtained which revealed the influence of environmental pressure,flight Mach number,the total pressure ratio of fan and core,the pressure drop ratio and other parameters on nozzle-performance coefficients. The results show that the pressure drop ratio of nozzle is the most important factor in the influencing parameters for nozzle performance,and flight Mach number is the secondary influencing parameter. The environmental pressure and the total pressure ratio of fan and core have the least effects on nozzle performances,and the total pressure ratio of fan and core has little impact on the core-nozzle flow coefficient,which has no influence on the fan-nozzle flow coefficient and can be ignored.

关 键 词：分排涡扇发动机 流动特性 数值计算 影响参数 

分 类 号：V235.13[航空宇航科学与技术—航空宇航推进理论与工程]