In the present work are investigated the cooling performance of small fins under the conditions of both natural and forced air convection flows to gather some understanding from the view point of designing some compact heat sink to be used in LSI packages. Experiments were carried out under the conditions of both natural and forced air convection. Several kinds of heat sink having different base areas, fin intervals and fin heights were heated up by electric heater attached at the base area to supply a specific heat flux. Fin temperature rise was measured on the basis of small thermocouples. In the case of experiments under the condition of natural air convection, the effect of supplied power on the temperature rise of the fin was examined for different fin intervals and fin heights. In the case of experiments under the condition of forced air convection flows a wind tunnel facility was used. The model heat sink, supplied with a specific heat flux to the fins was placed at the downstream of the wind tunnel and the correlations between the air flow velocity and temperature rise in fins were studied. Furthermore, based on those results, some non-dimensional expressions to evaluate cooling performance of a compact heat sink composed of small fins were examined.
展开▼
