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  • 主管单位:
  • 上海市教育委员会
  • 主办单位:
  • 上海理工大学
  • 主  编:
  • 庄松林
  • 地  址:
  • 上海市军工路516号
  • 邮政编码:
  • 200093
  • 联系电话:
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  • 国际标准刊号:
  • 1007-6735
  • 国内统一刊号:
  • 31-1739/T
  • 邮发代号:
  • 4-401
  • 单  价:
  • 15.00
  • 定  价:
  • 90.00
龚红兰,李凌.某发动机喷管内流动与换热的瞬态模拟[J].上海理工大学学报,2020,42(4):320-325.
某发动机喷管内流动与换热的瞬态模拟
Transient simulation of flow and heat transfer in the engine nozzle
投稿时间:2019-05-14  
DOI:10.13255/j.cnki.jusst.20190514001
中文关键词:  喷管  瞬态  传热  数值模拟
英文关键词:nozzle  transient  heat transfer  numerical simulation
基金项目:国家自然科学基金资助项目(51476102)
作者单位E-mail
龚红兰 上海理工大学 能源与动力工程学院上海 200093  
李凌 上海理工大学 能源与动力工程学院上海 200093 liling@usst.edu.cn 
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中文摘要:
      为准确预测发动机喷管内部的流动及传热特性,以Navier-Stokes方程、重整化群(RNG)k-ε湍流模型为基础,借助计算流体力学软件Fluent对喷管内流场及温度场进行了瞬态数值模拟。计算结果表明:发动机燃烧初期,喷管内燃气呈亚音速状态流动,喷管整体温度还比较低;随着时间的推移,喷管内开始出现激波,燃气的速度突然降低,温度突然上升,由于激波的影响,气流在激波下游形成低速高温区域;随着燃气的膨胀,激波逐渐移出喷管,喷管内燃气呈超音速状态流动,喷管整体温度较高。研究结果可为喷管的设计及优化提供一定的参考。
英文摘要:
      In order to accurately predict the flow and heat transfer characteristics in the engine nozzle, the Navier-Stokes equation and the renormalization group (RNG) k-ε turbulence model were used as the basis for the transient numerical simulation of the flow and temperature field in the nozzle by the computational fluid dynamics software Fluent. The calculation results show that in the initial stage of combustion in the engine, the fuel gas in the nozzle flows at a subsonic speed, and the overall temperature of the nozzle is still relatively low. As time goes on, shock waves begin to appear in the nozzle, and this is accompanied by the sudden decrease in the gas speed, and the sudden increase in the gas temperature. Due to the impact of the shock wave, the airflow forms a low-speed and high-temperature region in the downstream of the shock wave. As the gas expands, the shock wave gradually moves out of the nozzle, and the fuel gas in the nozzle flows at a supersonic speed, and the overall temperature of the nozzle is high. The research results can provide some references for the design and optimization of the engine nozzle.
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