Investigation of Heat Transfer Characteristics on Rod Fastening Rotor

Abstract

In order to study the contact heat transfer characteristics on the joint interface of the distributed rod fastening rotor under the influence of different pretension and the roughness of different wheel disk. The thermal contact resistance fractal model on the joint interface of the distributed rod fastening rotor is established, and the thermodynamic calculation of the rod fastening rotor is carried out. A contact heat transfer characteristic test rig for the rod fastening rotor is designed and built. The temperature field of the rod rotor is measured with the change of the tension force of the pull rod and the surface roughness of the wheel. The results show that the heat transfer coefficient of the joint interface increases with the increase of the pretension of the rod, and decreases with the increase of the surface roughness of the wheel. The thermal contact resistance fractal model of the joint interface is verified, and it is proved that it is suitable for the study of the thermal contact resistance on joint interfaces.