Journal of Flow Visualization and Image Processing

ISSN for PRINT: 1065-3090

For Online Access

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2006, Volume13

Issue 4

118 pages

DOI: 10.1615/JFlowVisImageProc.v13.i4

Issue price - $154.00

Chen-Yuan Wu
Graduate School of Defense Science Studies, Chung Cheng Institute of Technology, National Defense University, Taoyuan, Taiwan 335, Republic of China

Jr-Ming Miao
Department of Mechatronic, Energy and Aerospace Engineering, Chung Cheng Institute of Technology, National Defense University, Taoyuan, Taiwan 335, R.O.C.

In the present study we performed a numerical investigation on the conjugate thermal performance of a film-cooled concave composite plate, which represents the concave part of a typical turbine blade. Geometrically, the vents of the cooling holes are fan-shaped with an expansion angle of 15 deg. There are two rows of staggered holes with spacing of three times of the inner diameter of the hole. The three-dimensional steady-state CFD analysis was conducted by thermal conjugation of inside and outside fields of the tested concave model, which consists of convection heat transfer around the plate, thermal conduction in the plate material, and internal coolant-supplying plenum. Both the hot-wall-surface temperature distribution and the conduction pattern within the wall thickness are calculated. Influence of the blowing ratio on the plate temperature was also investigated by using the present numerical procedures. Results are presented for the surface temperature distribution, velocity vector field, and surface film-cooling effectiveness pattern. As compared with the previous results of a thin shell model used in most published literature, the present results also displayed characteristic variations of local temperature patterns nearby the two rows of cooling holes.

DOI: 10.1615/JFlowVisImageProc.v13.i4.50 Download article, 377-392 pages

Article price - $35.00

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