Influence of high-temperature air on Three-dimensional Nozzle structure design
The three-dimensional nozzle is used in the supersonic wind tunnel,as an import part of wind tunnel to obtain the flow field with designed Mach number,and the structure of nozzles has direct influence on the uniformity of flow field.In the nozzle structure design of conventional wind tunnel,the power of wind tunnel is clean compressed air,usually adopted the convection heat transfer method to solve the problem.In this paper,the exit diameter of nozzle is Φ 1.4 m,and the Mach number is 4.0; the nozzle is used in high-speed free jet wind tunnel for engine test with high temperature and pressure air and the mixture of heater combustion as working medium; The mixture is high temperature gas,mainly contains CO2,N2 and H2O.In the process of nozzle structural design,consider the interaction of radiation heat transfer and convection heat transfer fully; heat transfer problems aimed at the nozzle in complex gas,solid,liquid multiphase flow,form the calculation model of the radiation-convection-steady state – convection.Calculated by engineering and Ansys methods,The results show that,the convection heat transfer has an important effect on the air-surface by the high-temperature air in the entrance and the thorat of nozzle; Convection heat has a great influence on the air-surface temperature distribution of nozzle.It must be applied to the solution of temperature field in the nozzle structure design.A great deal of experiments show that,the temperature of the nozzle entrance and exit on the air-surface is close to the calculation results.The experimental results show that the nozzle works very well.In this paper,the calculation is described in details.The teat transfer calculation and some typical experimental results of three-dimensional nozzle and the photographs of the nozzle are also presented.
Convection heat transfer Three-dimensional nozzle Structure Flow field
Bu Junhui Liu Huaiyin Wang ying Sun Yongtang
China Academy of Aerospace Aerodynamics,100074,Beijing,China
国际会议
2014 Asia-Pacific International Symposium on Aerospace Technology(2014亚太航空航天技术学术会议)
上海
英文
1-7
2014-09-24（万方平台首次上网日期，不代表论文的发表时间）