Effects of non-isothermal single circular impinging jet on a quasi-adiabatic flat plate

A test facility for the jet impingement cooling technique was redesigned based on literatures to investigate the effect of varying jet impingement hole diameter and jet impingement Reynolds number to the flow thermal behaviour. The total hydraulic diameter of the facility, inlet nozzle and the orifi...

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Main Author:	Mohd Saiah, Helmey Ramdhaney
Format:	Thesis
Language:	English
Published:	2011
Subjects:	Air jets Vertically rising aircraft
Online Access:	http://psasir.upm.edu.my/id/eprint/42263/1/FK%202011%2074R.pdf
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id	my-upm-ir.42263
record_format	uketd_dc
spelling	my-upm-ir.422632016-03-14T03:24:53Z Effects of non-isothermal single circular impinging jet on a quasi-adiabatic flat plate 2011-03 Mohd Saiah, Helmey Ramdhaney A test facility for the jet impingement cooling technique was redesigned based on literatures to investigate the effect of varying jet impingement hole diameter and jet impingement Reynolds number to the flow thermal behaviour. The total hydraulic diameter of the facility, inlet nozzle and the orifice plates were designed in accordance to the British Standards for fluid flow in a closed conduit, BS1042. Jet impingement test plates were fabricated by scaled factors to represent the real condition in the turbine blade itself. The experimental tests include single jet impingement hole arrangements with hole diameter of 5, 7, and 10 mm, and jet impingement Reynolds number ranging from 20000 - 30000. Video images of the experiment were captured using a digital video camera, and the video images were then extracted into still images. These still images were analyzed using MatLab software to get the heat transfer coefficient and surface temperature. The most suitable design parameters at a given range of design parameters were pointed out. The experimental data obtained includes the effects of varying the jet impingement hole diameter and the jet impingement Reynolds number on heat transfer coefficient distribution and the non-dimensional parameter, Nusselt number. The coverage area of the stagnation region and the location of the wall jet region were also considered. It was found that increasing jet impingement hole diameter resulted in an increase towards the stagnation region area and wall jet region location. Development of jet impingement potential core was also discussed and optimal design parameters for the current test facility were pointed out. At jet impingement Reynolds number of 20000, the 5 mm jet impingement hole diameter design achieved the highest heat transfer process, but as the jet impingement Reynolds number increased to 25000 and 30000, the 10 mm jet impingement hole diameter dominated the heat transfer process. Recommendation on future work would include the integration of turbine stage internal cooling technique and external cooling technique and also the utilization of multiple thermochromic liquid crystals coating for a better heat transfer coefficient distribution. Air jets Vertically rising aircraft 2011-03 Thesis http://psasir.upm.edu.my/id/eprint/42263/ http://psasir.upm.edu.my/id/eprint/42263/1/FK%202011%2074R.pdf application/pdf en public masters Universiti Putra Malaysia Air jets Vertically rising aircraft
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
topic	Air jets Vertically rising aircraft
spellingShingle	Air jets Vertically rising aircraft Mohd Saiah, Helmey Ramdhaney Effects of non-isothermal single circular impinging jet on a quasi-adiabatic flat plate
description	A test facility for the jet impingement cooling technique was redesigned based on literatures to investigate the effect of varying jet impingement hole diameter and jet impingement Reynolds number to the flow thermal behaviour. The total hydraulic diameter of the facility, inlet nozzle and the orifice plates were designed in accordance to the British Standards for fluid flow in a closed conduit, BS1042. Jet impingement test plates were fabricated by scaled factors to represent the real condition in the turbine blade itself. The experimental tests include single jet impingement hole arrangements with hole diameter of 5, 7, and 10 mm, and jet impingement Reynolds number ranging from 20000 - 30000. Video images of the experiment were captured using a digital video camera, and the video images were then extracted into still images. These still images were analyzed using MatLab software to get the heat transfer coefficient and surface temperature. The most suitable design parameters at a given range of design parameters were pointed out. The experimental data obtained includes the effects of varying the jet impingement hole diameter and the jet impingement Reynolds number on heat transfer coefficient distribution and the non-dimensional parameter, Nusselt number. The coverage area of the stagnation region and the location of the wall jet region were also considered. It was found that increasing jet impingement hole diameter resulted in an increase towards the stagnation region area and wall jet region location. Development of jet impingement potential core was also discussed and optimal design parameters for the current test facility were pointed out. At jet impingement Reynolds number of 20000, the 5 mm jet impingement hole diameter design achieved the highest heat transfer process, but as the jet impingement Reynolds number increased to 25000 and 30000, the 10 mm jet impingement hole diameter dominated the heat transfer process. Recommendation on future work would include the integration of turbine stage internal cooling technique and external cooling technique and also the utilization of multiple thermochromic liquid crystals coating for a better heat transfer coefficient distribution.
format	Thesis
qualification_level	Master's degree
author	Mohd Saiah, Helmey Ramdhaney
author_facet	Mohd Saiah, Helmey Ramdhaney
author_sort	Mohd Saiah, Helmey Ramdhaney
title	Effects of non-isothermal single circular impinging jet on a quasi-adiabatic flat plate
title_short	Effects of non-isothermal single circular impinging jet on a quasi-adiabatic flat plate
title_full	Effects of non-isothermal single circular impinging jet on a quasi-adiabatic flat plate
title_fullStr	Effects of non-isothermal single circular impinging jet on a quasi-adiabatic flat plate
title_full_unstemmed	Effects of non-isothermal single circular impinging jet on a quasi-adiabatic flat plate
title_sort	effects of non-isothermal single circular impinging jet on a quasi-adiabatic flat plate
granting_institution	Universiti Putra Malaysia
publishDate	2011
url	http://psasir.upm.edu.my/id/eprint/42263/1/FK%202011%2074R.pdf
_version_	1747811901814865920

Effects of non-isothermal single circular impinging jet on a quasi-adiabatic flat plate

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