Open Access

ARTICLE

NUMERICAL STUDY OF JET IMPINGEMENT FORCE AND HEAT TRANSFER ON A MOVING CURVED SURFACE

Ali Chitsazan^a , Georg Klepp^a, Birgit Glasmacher^b

a Institute for Energy Research, Ostwestfalen-Lippe University of Applied Sciences and Arts, Lemgo 32657, Germany
b Institute for Multiphase Processes, Leibniz University Hannover, Hannover 30167, Germany

Frontiers in Heat and Mass Transfer 2022, 18, 1-7. https://doi.org/10.5098/hmt.18.15

Abstract

The effect of surface curvature, number of jets, number of jet rows, jet arrangement, crossflow, and surface motion on the heat transfer and pressure force performance from multiple impinging round jets on the moving flat and curved surface have been numerically evaluated. The more number of jets (more than three jets) has no significant effect on the average heat transfer rate. The more number of jet rows increases the strength of wall jets interference and crossflow effects and degrade the average heat transfer rates. There is a minor difference between inline and staggered arrangements on both moving flat and curved surfaces. The surface motion has a stronger effect on the impinging jets in the intermediate crossflow scheme than in the minimum crossflow scheme. The total average Nu on both moving flat and curved surfaces reduces with an increase in the velocity ratio and surface curvature. The pressure force is relatively insensitive to the surface motion on both moving flat and curved surfaces.

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