Friction and forced convective heat transfer in a sintered porous channel with obstacle blocks |
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| Authors: | Sheng-Chung Tzeng Wei-Ping Ma Yen-Chan Wang |
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| Institution: | (1) Department of Mechanical Engineering, Chiekuo Technology University, No. 1, Chieh Shou N Road, Changhua, 500, Taiwan, ROC;(2) Department of Computer Application Engineering, Lanyang Institute of Technology, Ilan, 261, Taiwan, ROC |
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| Abstract: | This work experimentally studies the flow characteristics and forced convective heat transfer in a sintered porous channel
that filled with sintered copper beads of three average diameters (
 0.830, and 1.163 mm). The pressure drop and the local temperature measurements can be applied to figure out the distributions
of the friction coefficient and the heat transfer coefficient. Three sintered porous channels differ in the arrangement of
obstacle blocks. Model A has no obstacle. Models B and C have five obstacle blocks facing down and up, respectively, in a
sintered porous channel. The range of experimental parameters, porosity, heat flux, and effect of forced convection are 0.370
≤ ɛ ≤ 0.385, q=0.228, 0.872, 1.862 W/cm2, and 200 ≤ Re
d ≤ 800. The permeability and inertia coefficient of each of the three sintered porous channels are analyzed. The results for
Model A agree with those obtained by previous investigations in C
f distribution. The heat transfer of Model C exceeds that of Model A by approximately 20%. Finally, a series of empirical correlation
equations were obtained for practical applications and engineering problems. |
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