Simulation of the Thermal Contact Resistance Characteristics on Rod Fastening Rotor

摘要

The thermal contact resistance model of the rod fastening rotor is improved,which can be more suitable for the engineering condition.By means of numeric simulation,the relationships between characteristics of the heat transfer between contact interfaces and the pre-tightening force of the tie rod,the surface roughness and the temperature of the contact interface are revealed intuitively.The simulation results show that the coefficient of contact heat transfer between the contact interfaces will increases with the pre-tightening pretension of the tie rod,will decreases with the increase of the surface roughness,and will increases with the increase of the surface temperature.It is also shown that the thermal contact resistance between the contact interfaces will have an important influence on the overall temperature distribution and heat transfer of the rod fasten rotor,and the thermal contact resistance between the interfaces must be considered when the temperature field distribution of the rod fastening rotor are accurately researched.