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ISBN: 978-1-56700-537-0

ISBN Online: 978-1-56700-538-7

ISSN Online: 2377-424X

International Heat Transfer Conference 17
August, 14-18, 2023, Cape Town, South Africa

NUMERICAL STUDY OF THE HEAT TRANSFER CHARACTERISTICS OF IMPINGING JETS ON A STEADY OR MOVING PLATE

Get access (open in a dialog) DOI: 10.1615/IHTC17.220-20
10 pages

Abstract

This study investigates the flow and heat transfer characteristics of typical confined impinging jets on a steady or moving plate and in the presence of an exhaust slot channel − an application for aerodynamic sealing purposes. Validated RANS predictions revealed that the impinging flow structure is strongly influenced by the nozzle-to-plate ratio (H/B). While, for high H/B ratios, some widely applied RANS turbulence models produce poor predictions of the overall flow field, for low H/B ratios, the Nusselt number second peak is only estimated by turbulence models with transitional flow modifications for slot jets and by a wider range of models for circular jets. The effects of the plate movement and exhaust slot were evaluated for the proposed system. Overall, both parameters affect the deviation of the impinging jet and the formation of the recirculation zones, but the safety of the process was verified for realistic operating conditions.