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针对大功率LED模块用液冷基板,通过理论分析,提出中间入口的S型流道、双S型流道和中间入口的双S型流道3种改进流道结构,并进行数值模拟。模拟结果表明,在相同的入口流速(流量)和入口水温下,中间入口的S型流道具有最佳的流动和换热综合性能;双S型流道性能次之;中间入口的双S型流道压降最小、且随入口流速增长缓慢,具有最佳的流动性能,提高流量时其散热性能可得到显著改善,因而流量可变时,该流道的综合性能最好。
According to the theoretical analysis of liquid-cooled substrates for high-power LED modules, three kinds of improved runner structures of S-channel, S-channel and double-inlet at the middle inlet are proposed and numerical simulation is carried out. The simulation results show that at the same inlet velocity (flow rate) and inlet water temperature, the S-shaped runner at the middle inlet has the best comprehensive performance of flow and heat transfer; the double S-shaped runner has the next performance; The minimum pressure drop in the flow channel, with the slow increase of the inlet flow rate, has the best flow performance, and the heat dissipation performance can be significantly improved when the flow rate is increased. Therefore, when the flow rate is variable, the overall performance of the flow channel is the best.