纳米流体热管砂轮成型磨削钛合金换热性能评价  

Evaluation of Heat Transfer Performance of Nanofluid Heat Pipe Grinding Wheel Forming and Grinding Titanium Alloy

作　　者：陈佳佳 刘松炎 杨勇 袁冬冬 张立勇 傅玉灿[2] 钱宁 CHEN Jiajia;LIU Songyan;YANG Yong;YUAN Dongdong;ZHANG Liyong;FU Yucan;QIAN Ning(College of Mechanical and Electronic Engineering,Nanjing Forestry University,Nanjing 210037;College of Mechanical and Electronic Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016)

机构地区：[1]南京林业大学机械电子工程学院,南京210037 [2]南京航空航天大学机电学院,南京210016

出　　处：《机械工程学报》2024年第15期407-419,共13页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51905275);江苏省基础研究计划(自然科学基金)(BK20190752);江苏省精密与微细制造技术重点实验室开放基金资助项目。

摘　　要：制约难加工材料成型磨削的主要问题是磨削烧伤。将轴向旋转热管技术(Axial rotating heat pipe,ARHP)与纳米流体技术相结合用于强化磨削弧区的换热效果,采用计算流体力学(Computational fluid dynamics,CFD)数值模拟方法研究纳米流体轴向旋转热管砂轮(Axial rotating heat pipe grinding wheel,ARHP-GW)的换热性能。从磨削热流密度、砂轮转速和砂轮种类(普通砂轮、工质为去离子水的轴向旋转热管砂轮、工质为金刚石纳米流体的轴向旋转热管砂轮)等三个角度对砂轮磨削钛合金的传热性能进行评估。采用数值仿真方法对轴向旋转热管砂轮磨削TC4钛合金过程进行数值模拟,探究了三种砂轮在不同热流密度和转速下磨削弧区的换热性能。结果表明,轴向旋转热管砂轮加工时砂轮-工件接触弧区的温度显著降低,轴向旋转热管砂轮的传热性能要远优于普通砂轮;填充金刚石纳米流体的轴向旋转热管砂轮传热性能要高于去离子水作为工质的轴向旋转热管砂轮,即使在1×108 W/m2的高热流密度的条件下仍然能够保持这一特性。最后,开展了TC4钛合金成型磨削试验验证了纳米流体热管砂轮在1800 r/min的高转速条件下的换热效果。The primary issue hindering the machining of difficult-to-process materials is grinding burn.In this study,axial rotating heat pipe(ARHP)technology is combined with nanofluid technology to enhance the heat transfer effect during grinding.computational fluid dynamics(CFD)numerical simulation method is employed to investigate the heat transfer performance of nanofluid axial rotating heat pipe grinding wheel(ARHP-GW).The heat transfer performance of grinding wheels in grinding titanium alloy is evaluated from three perspectives:Grinding heat flux,the rotational speed and types of grinding wheels(conventional grinding wheel,ARHP-GW with deionized water and diamond nanofluid as the working fluid,respectively).The results indicate that the temperature of the grinding contact zone significantly decreases as using ARHP-GWs,showing their superior heat transfer performance compared to the conventional one.The heat transfer performance of ARHP-GWs filled with diamond nanofluid is higher than that of using deionized water.This characteristic is maintained even under the high heat flux of 1×108 W/m2.Finally,the TC4 titanium alloy forming grinding test is carried out to verify the heat transfer effect of ARHP-GW diamond nanofluid at 1800r/min.

关 键 词：成型磨削 难加工材料 轴向旋转热管 强化换热 数值模拟 

分 类 号：TK172[动力工程及工程热物理—热能工程]