Heat Exchange Enhancement Of Jet Impingement Cooling With The Novel Humped-Cone Heat Sink

Jet impingement cooling technology is applicable to control temperature of devices, where very high heat flux is generated within a small area. This paper is about the improvement of the jet impingement cooling efficiency by the heat sink geometry modification. Two reference cases were sourced from the literature - flat heat sink and modified one with cone in the jet stagnation region. Such a change improves cooling capability by more than 10%. Presented thermal fluid-solid interaction numerical results are focused to understand better the physics of that improvement and proposed the next step of shape optimization.Two geometrical parameters were investigated - cooling channel's height and cone's side wall deformation radius. That includes twenty radiuses for each of three heights. Together with two reference cases, sixty-two shapes were analysed. Such extensive parametrical study was possible thanks to the usage of 2D axisymmetric model, which very well matched to the referenced 3D analysis and experiment. It was concluded, that cone deformation impact varies with the cooling channel's height. For the optimum geometrical configuration, 11% cooling capability improvement was concluded in comparison to the reference flat surface (8% due to the channel height's reduction and 3% due to the cone's deformation).