Gear heat dissipation simulation and experiment under nanofluid lubrication

IF 6.4 2区工程技术 Q1 MECHANICS International Communications in Heat and Mass Transfer Pub Date : 2024-07-01 DOI:10.1016/j.icheatmasstransfer.2024.107689

Yijie Chen , Changjiang Zhou , Haikang Chen , Jie Su

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Abstract

To improve the heat dissipation of gear churning oil, six types of nanofluids are prepared using 2% concentration Al₂O₃, SiO₂, Fe₃O₄, TiO₂, CuO and graphene oxide (GO) nanoparticles and using castor oil as the base lubricant oil. The method of applying nanoparticles to lubricating oil to improve gear tooth surface heat dissipation is proposed. The 3D dynamic mesh technology and the computational fluid dynamics–volume of fluid (CFD–VOF) model were adopted to investigate the lubricant flow characteristics and gear heat dissipation performance. The numerical model of gear heat dissipation is verified by thermal imaging infrared experiment, and the simulation results are in good agreement with the experimental results. The effects of gear speed and oil immersion depth on gear heat dissipation are analyzed. The best heat dissipation performance of the gears is achieved at an oil immersion depth of l = 1.5 h and 420 rpm, its thermal performance is increased by 163.95% compared to l = 0.5 h and 1200 rpm. Based on this optimal working condition, the heat dissipation is analyzed under different nanofluid lubrication. The results show that GO has the best heat dissipation performance with a 50% increase in heat transfer coefficient compared to pure castor oil.

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纳米流体润滑下的齿轮散热模拟与实验

为了改善齿轮搅动油的散热性能，使用 2% 浓度的 Al2O3、SiO2、Fe3O4、TiO2、CuO 和氧化石墨烯 (GO) 纳米粒子制备了六种纳米流体，并使用蓖麻油作为基础润滑油。提出了在润滑油中添加纳米颗粒以改善齿轮齿面散热的方法。采用三维动态网格技术和计算流体力学-流体体积（CFD-VOF）模型研究了润滑油流动特性和齿轮散热性能。通过热成像红外实验对齿轮散热数值模型进行了验证，仿真结果与实验结果吻合良好。分析了齿轮转速和浸油深度对齿轮散热的影响。在浸油深度为 l = 1.5 h、转速为 420 rpm 时，齿轮的散热性能最佳，与 l = 0.5 h、转速为 1200 rpm 时相比，散热性能提高了 163.95%。根据这一最佳工作条件，分析了不同纳米流体润滑条件下的散热情况。结果表明，与纯蓖麻油相比，GO 的散热性能最好，传热系数提高了 50%。

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来源期刊

International Communications in Heat and Mass Transfer 工程技术-力学

CiteScore

11.00

自引率

10.00%

发文量

648

审稿时长

32 days

期刊介绍： International Communications in Heat and Mass Transfer serves as a world forum for the rapid dissemination of new ideas, new measurement techniques, preliminary findings of ongoing investigations, discussions, and criticisms in the field of heat and mass transfer. Two types of manuscript will be considered for publication: communications (short reports of new work or discussions of work which has already been published) and summaries (abstracts of reports, theses or manuscripts which are too long for publication in full). Together with its companion publication, International Journal of Heat and Mass Transfer, with which it shares the same Board of Editors, this journal is read by research workers and engineers throughout the world.