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Second Thermal and Fluids Engineering  Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

A NUMERICAL STUDY OF FLOW AND HEAT TRANSFER IN WEDGED CORRUGATED PLATE CHANNELS

Pey-Shey Wu
Da-Yeh University, 168 University Rd., Dacun, Changhua 51591, Taiwan

Jun-Yun Wu
Da-Yeh University, 168 University Rd., Dacun, Changhua 51591, Taiwan

Abstract

Flow and heat transfer characteristics for varying-amplitude, wedged corrugated plate channels with accelerating flow effect are numerically investigated. The wedge angle of this study, for possible application to the trailing-edge cooling of gas turbine blades, is confined to within 10 degrees with the case of no wedge angle as the basis for comparison. Other varying parameters include corrugation angle and Reynolds number. The CFD software FlowVision is employed for numerical computation. The rectangular mesh of the software reduces the difficulty in meshing the regions around contact points of the two wavy plates. Computed results of local flow field, pressure drops, and Nusselt number (Nu) are presented to reveal the transport phenomena of such wedged corrugated plate channels. With the acceleration effect of the wedged channel, Nusselt number increases from the channel entrance to the exit. Although this trend is similar for a fixed wedge angle, the Nusselt number values vary significantly with corrugation angle. In average, the corrugation angle of 60 degrees gives the highest Nu number, but the variation along the main flow direction is also the largest, compared to the corrugation angles of 30 and 45 degrees. In the transverse direction, Nu has the highest value at the peak and the lowest value at the valley. Most of the fluid flows along the trough. However, the secondary flow patterns vary remarkably with corrugation angle.

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