Study On The Effect Of Liquid Metal On The Heat Transfer Performance Of Oscillating Heat Pipe

With the growth of the economy in recent years,the number and tonnage of ships in various countries has increased,With the advancement of intelligent ships,the heat created by a high number of intelligent equipment requires an efficient heat exchange system to release it,ensuring the ship’s safe functioning.As a new heat exchange equipment,oscillating heat pipe has small volume,light weight and high heat exchange efficiency,it is believed to tackle the problem of effective heat dissipation in marine electronic components.Liquid metal,as a new functional material with unique physical and chemical properties,is in liquid state at room temperature and has high thermal conductivity,strong electrical conductivity and other properties.In this thesis,liquid metal(Ga_75.5In_24.5)is combined with oscillating heat pipe,and the relevant experimental and theoretical research is conducted.The following are the primary conclusions:In this thesis,an experimental platform for the influence of liquid metal on the heat conductivity of deionized water oscillating heat pipe was established.The impact of liquid metal on the heat conductivity of deionized water oscillating heat pipe at different filling rates and inclination angles were investigated.The findings of the experiment reveal that:When the heating power ranges from 15W to 200W,the heat transfer performance of the single-working fluid deionized water and liquid metal deionized water oscillating heat pipe at 0°is inferior to that at 90°.The heat transmission performance of an oscillating heat pipe with a 30%filling ratio is superior than that of an oscillating heat pipe with a 70%filling ratio at the same inclination angle.When the heating power is between 100 and 200W,as opposed to 15 to100W.the effects of filling ratio and inclination angle on liquid metal strengthening are remarkable.Furthermore,with the addition of liquid metal,it will raise the temperature of the condensation section and reduce the temperature of the evaporation section of the deionized water oscillation heat pipe,which effectively reduces the thermal resistance of the oscillation heat pipe.In this thesis,an experimental platform for the influence of liquid metal on the heat transfer performance of methanol oscillating heat pipe was established.The influence of liquid metal on heat transfer efficiency of liquid metal on the heat conductivity of methanol oscillating heat pipe at different filling rates and inclination angles were investigated.The findings of the experiment reveal that:The addition of liquid metal will also enhance the heat conductivity of the methanol oscillating heat pipe.When the heating power is 100W to 200W,as opposed to 15W to 100W,the filling ratio and inclination angle have a significant effect on the liquid metal’s strengthening impact.The addition of liquid metal will also make the temperature fluctuation of methanol oscillating heat pipe more violent,the temperature of condensation section increases and the temperature of evaporation section decreases,which can effectively reduce an oscillating heat pipe’s thermal resistance.The oscillating heat pipe heat transfer model with liquid metal is established on the basis of the model of oscillating heat pipe with single working medium.The theoretical calculation results show that:For the oscillating heat pipe,the addition of a small amount（0.01g,0.02g）liquid metal can increase the proportion of latent heat,Then,the heat exchange rate of working medium in the tube are improved,The thermal resistance of oscillating heat pipes has been lowered,and their heat transmission performance has been improved.