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ISSN Online: 2377-424X

International Heat Transfer Conference 12
August, 18-23, 2002, Grenoble, France

Impingement Cooling in Ribbed Ducts Due to Jet Arrays

Get access (open in a dialog) DOI: 10.1615/IHTC12.1070
6 pages

Abstract

A numerical simulation of impingement heat transfer and fluid flow in a rectangular two-pass duct was carried out. The impingement wall was smooth or with periodically mounted square ribs. A multi-block parallel CFD code is employed for the calculation. The turbulence modeling consists of the low-Re turbulence eddy viscosity model (LEVM) and a V2F model. Firstly, the calculation is validated against the experimental data in a two-pass channel where the impingement wall is smooth. Then, jets impinging on ribbed walls are simulated. The distance from the nozzle to the impingement wall is fixed at four-nozzle diameter (d). The square rib width is set as 0.5 d. The channel inlet Reynolds number was fixed at 10,000. Results show that the presence of ribs is favorable for the heat transfer enhancement on the impingement wall, but not for the side wall.