Thermal analysis of ventilated brake disc based on heat transfer enhancement of heat pipe

摘要

Based on the thermal conduction and temperature uniformity of heat pipe and on the premise of ensuring the strength safety requirements of ventilated brake disc (VBD), transfer the heat of high temperature zone to low temperature zone timely by embedding heat pipes on the surfaces of VBD, and the heat transfer enhancement study of VBD during braking processes were developed. The brake bench test and numerical simulation analysis of heat pipe ventilated brake disc (HPVBD) and general ventilated brake disc (GVBD) under the condition of repeated fifteen braking and continuous downhill braking were carried out respectively. It is concluded that under experimental conditions, the maximum heat dissipation and the maximum temperature uniformity of VBD increased by 12.62% and 36.67% during repeated fifteen braking. The highest temperature decreased by 31 degrees C, and the temperature uniformity increased by 21.43% during continuous downhill braking; under simulation conditions, the maximum heat dissipation and the maximum temperature uniformity of VBD increased by 13.66% and 10.77% during repeated fifteen braking. The highest temperature decreased by 7 degrees C during continuous downhill braking; better heat transfer effects were achieved through inserting heat pipes on the surfaces of VBD under the two braking conditions.

关键词