Numerical Analysis on Rupture Process of Large Diameter Diaphragm in a Combined High Enthalpy Wind Tunnel
The diaphragm rupture process in a shock tube affects the establishment of the flow field in a wind tunnel.The research on the diaphragm rupture process is also an important field in hypersonic technology.FL-63 wind tunnel is a pulse type combined high enthalpy wind tunnel for aero-thermal research in the Mach number 3.0～10.0 full speed range.According to the characteristics of thick pipe diameter in FL-63 wind tunnel in shock mode and high temperature in Ludwieg tube mode,the diaphragm used in the wind tunnel is of large diameter and in high temperature environment under partial operating conditions.In this paper,the rupture of the first diaphragm between the high-pressure and low-pressure sections is studied at room temperature and high temperature,and the three-dimensional display of the diaphragm rupture process is given.The rupture effects of the diaphragm under different geometrical parameters,different pressure ratios and different temperatures are compared.The research shows that the notch depth and temperature are the key factors affecting the rupture and pressure resistance of the diaphragm.The diaphragm with thickness of 2mm and notch of 1.2mm can meet the requirements of wind tunnel operation,and the rupture time of the high-temperature diaphragm is shorter than that of the normal temperature diaphragm.
combined high enthalpy wind tunnellarge diameter diaphragmrupture processexplicit dynamichigh temperature mechanical properties of material
NETL
NSTL
万方数据
维普
