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Experimental study of heat transfer distribution between an obliquely smooth flat plate and impinging air jet from circular nozzle

Tajaldin Moner, Mawahwab Abdalhamid (2013) Experimental study of heat transfer distribution between an obliquely smooth flat plate and impinging air jet from circular nozzle. Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

An experimental investigation is performed to study the effects of the plate angle, jet-to-plate spacing and Reynolds number on the local heat transfer distribution between an obliquely smooth flat plate and impinging circular air jet. In the experiments, the plate angles selected were 90°, 60" and 45", with 90' being a vertical jet. Reynolds number based on nozzle exit condition is varied from 12013, 15000 and 23016 and jet-to-plate spacing (LID= 2, 4, 6, and 8). The local heat transfer coefficients are estimated fiom the temperatures obtained from infrared thermal imaging camera. The results show that the heat transfer coefficient, h is higher at the stagnation region and decrease gradually at outlet region. The heat transfer coefficients increases by increasing Reynolds number and decreasing L/D ratio. The displacement region of maximum heat transfer coefficient (minimum temperature point) on the plate was measured with respect to geometrical impingement point. Results of experiments indicated that for a given position this displacement increases with increasing the plate angle (less than 90°), and the displacement was occurred on compression side of plate.

Item Type: Thesis (Masters)
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ255-265 Heat engines
Depositing User: Normajihan Abd. Rahman
Date Deposited: 04 Nov 2014 06:28
Last Modified: 04 Nov 2014 06:28
URI: http://eprints.uthm.edu.my/id/eprint/5850
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