Numerical investigation of a heat transfer characteristics of an impingement cooling system with non-uniform temperature on a cooled surface

7th European Thermal-Sciences Conference

Marzec, K.^1 ; Kucaba-Pietal, A.^2

Rzeszow University of Technology, MTU Aero Engines, Rzeszow, Poland^1

Rzeszow University of Technology, Rzeszow, Poland^2

关键词: Computational Fluid Dynamics codes;    Heat flux distributions;    Heat transfer characteristics;    Nonuniform temperature;    Numerical investigations;    Nusselt number distribution;    Shear-stress transport;    Three dimensional finite element model;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/745/3/032071/pdf
DOI  :  10.1088/1742-6596/745/3/032071

来源: IOP

【 摘 要 】

A series of numerical analysis have been performed to investigate heat transfer characteristics of an impingement cooling array of ten jets directed to the flat surface with different heat flux qw(x). A three-dimensional finite element model was used to solve equations of heat and mass transfer. The study focused on thermal stresses reduction on a cooled surface and aims at answering the question how the Nusselt number distribution on the cooled surface is affected by various inlet flow parameters for different heat flux distributions. The setup consists of a cylindrical plenum with an inline array of ten impingement jets. Simulation has been performed using the Computational Fluid Dynamics (CFD) code Ansys CFX. The k - ω shear stress transport (SST) turbulence model is used in calculations. The numerical analysis of the different mesh density results in good convergence of the GCI index, what excluded mesh size dependency. The physical model is simplified by using the steady state analysis and the incompressible and viscous flow of the fluid.