Publicado 8 números por año
ISSN Imprimir: 1065-5131
ISSN En Línea: 1563-5074
Indexed in
STUDY OF HEAT TRANSFER CHARACTERISTICS OF PERFORATED CIRCULAR PIN-FIN HEAT SINKS COOLED BY AN INCLINED IMPINGING JET
SINOPSIS
An experimental investigation has been carried out to study the effect of inclination on heat transfer characteristics of jet impingement cooling on circular pin-fin heat sinks with or without a hollow perforated base plate (Type A and Type B). In order to obtain insight into the fluid flow phenomena, flow visualization was also made to observe the detailed fluid flow characteristics for the inclined impinging to the present pin-fin heat sinks. The effects of flow Reynolds numbers (3500 ≤ Re ≤ 11,500), jet inclination angles (0° ≤ θ ≤ 45°), fin height, the geometry of the heat sinks (with or without a hollow perforated base plate) (Dh/Db), and the jet-to-test heat sink placement (16 ≤ H/D ≤ 1) were examined. Experimental results show that heat transfer, using pin-fin heat sinks, is significantly different for Type A and Type B. Comparison of the heat transfer coefficients for the inclined impinging jet, with respect to the impinging jet at θ = 0° under the same experimental conditions, were about 1.11- to 1.14-fold (θ = 10°), 1.18- to 1.25-fold (θ = 20°), 1.16- to 1.22-fold (θ = 30°), and 1.15- to 1.17-fold (θ = 45°), respectively. The present study strongly suggests the use of θ = 20°, 2 < H/d < 4, and (Dh/Db) < 0.15 constructed in an inclined impinging jet for the present pin-fin heat sinks.
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