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Experiment study of local heat transfer in a low air speed jet impinging on a oblong board in a vertical rectangle chamber by transient heat transfer method with thermochromic liquid crystal

This thesis presents the experiment study results on the local heat transfer coefficients for air jet impinging on a flat rectangle board. A transient thermochromatic liquid crystal technique is used to visualize and record isotherms on an impingement surface.
The parameter studied include Reynolds number¡]Re=108,142,170¡^,jet height from the rectangular board¡]H/D=0.086,0.172,0.259,0.345,0.431,0.52¡^, and size of outlet¡]B/D=1.45,1.86,2.41¡^. The correlation of average Nusselt number is curve-fitted with Re,H/D and B/D .
According to the present study,heat transfer is best when the Reynolds number is large,the jet height is small,and the outlet area is large .

Identiferoai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0814105-172334
Date14 August 2005
CreatorsLiao, Cheng-hao
Contributorsnone, none, none
PublisherNSYSU
Source SetsNSYSU Electronic Thesis and Dissertation Archive
LanguageCholon
Detected LanguageEnglish
Typetext
Formatapplication/pdf
Sourcehttp://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0814105-172334
Rightsunrestricted, Copyright information available at source archive

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