热管砂轮干磨削温度场数值模拟

基于一种利用热管技术对磨削弧区进行强化换热的构想,采用FLUENT软件建立了环形热管砂轮干磨削温度场的仿真模型,得到了热管换热能力与热流密度、转速和砂轮壁厚的关系,并在相同热流密度下对比了热管砂轮与热管砂轮弧区的温度。仿真结果表明:弧区温度会随着热流密度的增大相应升高,随着转速的增大而降低,热管的启动时间会随着砂轮壁厚的增大减慢;相同热流密度下,热管砂轮的弧区温度明显低于无热管砂轮。最后通过干磨削钛合金TC4试验,对仿真结果进行了验证。

Numerical simulation study on temperature field in dry grinding with heat pipe grinding wheel

Based on the heat pipe technology to exchange heat, the heat transfer mode] of heat pipe grinding wheel （HPGW） using Fluent software was established. The influence of heat flux, thickness and rotation speed on the heat exchange capability in grinding zone with HPGW was analyzed in dry grinding process. The grinding temperature of HPGW was also compared with the grinding wheel without heat pipe in the same heat flux. The results showed that the grinding temperature of HPGW went up with the rising heat flux, decreased with the rising rotation speed, and the start time of heat pipe got longer when the thickness increased. Furthermore, the grinding temperature of HPGW was much lower than the grinding wheel without heat pipe. In the end, the HPGW and the grinding wheel without heat pipe were respectively used to conduct dry grinding. The experiment results proved the simulation results.