Abstract
A forced convection heat transfer experiment was conducted to study the heat transfer from hot rectangular flat plate ( 155 x 115mm ) to an air stream. The hot plate was situated between unheated plates array at various locations in the flow direction. The study was mainly concerned with the effect of the plate location on the average film coefficient of the transfer. An experimental test rig was designed and constructed for this investigation. The experiments covered the plate locations of x= 12.5, 22.5, 32. 5, 42.5 and 62.5mm, and extended over a range of Revonolds number from about 6,680 to 107, 170. A correlation between the average Nusselt number, the Reynodls number and the hot plate dimensionless location (X) was deduced. The experiments were performed for the case of uniform heat flux. A comparison with the available work in the literature review was also made.
Highlights
Our pl'evious 9tudy llJ on the heat transfer fl'OIlL a flat plate that sitllatpri at ..liffet-eILt locaL ions in Lhe wind Lunnel channel pre~enLed a formula for the avera~e Nusselt number
I n order to find the avera.l£e heat transfer coefficients ~ll(.1 tlleit, correlation with air flow, some quantities are measured for each daLa run
The :l ir dens i t Y is tnken at the bulk temper:! ture. ',vh i Ie Lhe u t !J~r propertips are taken :!t the mean film temperature
Summary
Our pl'evious 9tudy llJ on the heat transfer fl'OIlL a flat plate that sitllatpri at ..liffet-eILt locaL ions in Lhe wind Lunnel channel pre~enLed a formula for the avera~e Nusselt number. This paper' presents the results of a subseQuent in\'estieatioll conducted to establ ish a formula for the avera~e :-lussel t numbet' of the hot plate s.ituated, in the wind tunnel du-', at differelrt locations between number of unheated pla.tes array. Al,[10-12] studied forced convection heat transfer at an inclined and yawed rectan~ular flat plate. Thev studied th~ tripping wires effect on heat transfer during air flow over the test plate. The T.ll'obit'nl ':.'onsidered is that of ail' flow thro'J.gh 'U';'.:1y or l\nheat~d f Jnt platt'S located in rhe '.vind tunnel duct, The heated flat. The >l1I!d tunn,"l duct has it squared Cl'oss-sed iOll d' 125 mm '\ 12j mm
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