Experimental study on the effect of external oscillation source on the heat transfer performance of closed loop oscillating heat pipe

doi:10.16411/j.cnki.issn1006-7736.2025.03.009

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Journal of Dalian Maritime University ›› 2025, Vol. 51 ›› Issue (3) : 85-95. DOI: 10.16411/j.cnki.issn1006-7736.2025.03.009

Experimental study on the effect of external oscillation source on the heat transfer performance of closed loop oscillating heat pipe

ZHAO Nannan^*，ZOU Meng，DU Hengxu，DONG Bowen

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Abstract

Using deionized water (70% liquid filling rate) as the working fluid, a comparative experimental study was conducted to investigate the effect of external oscillation sources on the heat transfer performance of closed-loop oscillating heat pipes.Firstly, the heat transfer performance of closed loop oscillating heat without external oscillation source was studied; Then the heating power was fixed at 25 W and 100 W respectively, and the effect of the oscillation period and amplitude of the external oscillation source on the heat transfer performance of the closed-loop oscillating heat pipe was studied,while the experimental results of the above two methods are compared and analyzed. The results show that, when the heating power is 25 W and 100 W,respectively, the external oscillation source can improve the heat transfer performance of the closed loop oscillating heat pipe. In terms of thermal resistance, the thermal resistance of the closed loop oscillating heat pipe with external oscillation source is smaller than that without external oscillation source, and the maximum reduction of thermal resistance is 68.5% and 48.1%, respectively.In terms of the temperature difference between the heating section and the condensing section, the temperature difference of the closed loop oscillating heat pipe with external oscillation source is lower than that without external oscillation source, and the maximum reduction of the temperature difference is 67.5% and 47.9%, respectively.In terms of the average temperature of the adiabatic section, the temperature of the closed loop oscillating heat pipe with external oscillation source is lower than that without external oscillation source, and the maximum decrease of the average temperature of the adiabatic section is 35.8% and 31.0%, respectively.In terms of start-up performance, the start-up time of the closed loop oscillating heat pipe with external oscillation source is shorter than that without external oscillation source, and the temperature fluctuation in the evaporation section is smaller.

Key words

oscillating heat pipe / external oscillation source / heat transfer performance / thermal resistance / temperature

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ZHAO Nannan, ZOU Meng, DU Hengxu, DONG Bowen.

Experimental study on the effect of external oscillation source on the heat transfer performance of closed loop oscillating heat pipe

[J]. Journal of Dalian Maritime University. 2025, 51(3): 85-95 https://doi.org/10.16411/j.cnki.issn1006-7736.2025.03.009

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