Experimental Study On Enhanced Heat Transfer Performance Of Corrugated Micro-channels

There are more and more electronic components on a motorcycle,and the degree of centralization is higher and higher.The heat dissipation of electronic components becomes more serious.IGBT is an important component of traction converter on locomotive and in the course of working.IGBT will break current at a high frequency,producing a lot of heat.Relevant researches about IGBT enunciated that if the heat generated by the IGBT module can not be distributed in time,it will affect the service life of IGBT and even lead to serious accidents.The heat dissipation problem of IGBT is vital to make the IBGT work normally in a safe temperature range.In order to effectively dissipate the heat generated by the electronic component IGBT,a cooling plate with strong heat transfer capability is needed.The paper designs a corrugated micro-channel cooling system which is composed of cooling plate and cooling core plate group combined related research.There are corrugated triangular teeth whose height is 0.5mm?1.0mm?1.5mm and addendum angles are 60°?80°?100° respectively on the surface of cooling basilar plate.A cooling channel whose height is 1.0mm,1.5mm,2.0mm respectively is formed after the cooling basilar plate and the cooling core-plate are combined together.And different combinations could get various architecture parameters.The IGBT module is tightly attached to the cooling basilar plate,and the cooling medium flows through the cooling channel absorbing and taking away the heat generated by the IGBT,finally lost in the external environment.This paper is investigated by numerical simulation and experimental method in order to find out the structural parameters of the cooling plate,which has the strongest heat transfer ability,by comparing and analyzing the experimental data.Utilizing SIMPLE algorithm to conduct numerical simulation and a detailed method of the selection of boundary conditions,the division of the grid,the control equation of the discrete process was introduced.On the other hand,this paper also has a detailed introduction of the experimental equipment,experimental preparation,experiment steps etc.Finally,the conclusions are drawn by comparing the experimental results and numerical simulation results.The results show that the heat exchanger performance was affected by the forming of vortices which were produced when the cooling medium passes through the triangular teeth.When the tooth height and the addendum angle of the triangular teeth remain unchanged,with channel height of the cooling channel increased,the heat transfer capability of the cooling system of the corrugated micro-channel can be improved.When the tooth height and the channel height of the triangular teeth remain unchanged,the heat transfer capacity of the corrugated micro-channel cooling system is lower than the heat transfer capacity of the angle of 60 degrees and 80 degrees when the tooth apex angle is 100 degrees.When the channel height of the cooling channel and the addendum angle of the triangular teeth remain unchanged,the teeth of the triangular teeth are smaller,and the heat transfer effect of the cooling system of the corrugated micro channel is better,and the resistance coefficient is smaller.