游磊1,2,王强1,2,刘笑瑜1,2.二元收-扩喷管与球形收敛调节片喷管的性能对比研究[J].航空发动机,2017,43(4):41-47
二元收-扩喷管与球形收敛调节片喷管的性能对比研究
Comparative Study on Performance of Two Dimensional Convergent-Divergent Nozzle andSpherical Convergent Flap Nozzle
  
DOI:
中文关键词:  非轴对称喷管  数值模拟  推力系数  后体阻力系数  航空发动机
英文关键词:non-axsymmetrically nozzle  numerical simulation  thrust coefficient  after-body drag coefficient  aeroengine
基金项目:航空动力基础研究项目资助
作者单位E-mail
游磊1,2,王强1,2,刘笑瑜1,2 1. 北京航空航天大学能源与动力工程学院2. 先进航空发动机协同创新中心:北京100191 youlei30@foxmail.com 
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中文摘要:
      为了对比二元收-扩喷管(2DCD)与球形收敛调节片喷管(SCFN)的性能,基于CFD 数值计算软件对2 种喷管在相同工作 点下进行了内外流场计算与分析。数值模拟结果表明:在相同高度及飞行马赫数条件下,SCFN的流量系数相较于2DCD呈现出较大 不同,推力系数则略差于2DCD;在低落压比条件下,2 种喷管内流对后体阻力特性影响不大;在高落压比条件下,2 种喷管内流对后 体阻力特性影响较大。
英文摘要:
      In order to compare the performance of two Dimensional Convergent-Divergent Nozzle (2DCD) and Spherical Convergent Flap Nozzle (SCFN), the calculation and analysis in the internal and external flow field at the same operating point based on CFD computational simulation software were performed. The numerical simulation results show that under the condition of the same altitude and flight Mach number, the mass flow coefficient of SCFN compared to the 2DCD's exhibits quite different and the thrust coefficient of SCFN is slightly worse than the 2DCD's. Under the condition of low nozzle pressure drop ratio, internal flow of two kinds of nozzles has little effect on after-body drag coefficient; under the condition of high nozzle pressure drop ratio, internal flow of two kinds of nozzles has a great influence on after-body drag coefficient.
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