水下大功率LED灯散热数值模拟和试验研究

Numerical and Experimental Research of Heat Dissipation for Underwater High-Power LED Light

摘要:

为进行水下大功率LED灯散热结构的多方案优化设计,基于CFD方法对某一型自主设计、加工和制造的LED灯进行自然对流工况下的流-固共轭传热数值模拟；为验证仿真结果准确性,进行了水箱试验验证,得到的热平衡状态下测点温度值与试验结果平均相对误差为2.9%；为预测实际水下环境中LED灯的内部工作温度,进行了水下大空间中LED灯的热平衡数值模拟,比较了不同海水流速下,横向和竖向翅片对应测点的温度变化趋势,为进一步优化特定作业环境下的LED灯散热结构提供参考。

Abstract:

This research focused on the numerical simulation of fluid-solid conjugate heat transfer in natural convection conditions, specifically addressing an independently designed and manufactured LED light. Employing Computational Fluid Dynamics (CFD) methods, the study aimed to optimize the multi-scheme design of the heat dissipation of the light in underwater environments. Validation efforts involved water tank testing, demonstrating 2.9% average relative error between simulated and measured temperatures under thermal equilibrium. Furthermore, the study delved into predicting the inner operating temperature of the LED light in large underwater spaces. Comparative analysis of temperature variations under varying seawater velocities and fin orientation provided valuable insights, guiding the refinement of the heat dissipation of the light for enhanced performance in specific underwater contexts.