izpis_h1_title_alt

Measurements on rotating blades using IR thermography
Mori, Mitja (Avtor), Novak, Lovrenc (Avtor), Sekavčnik, Mihael (Avtor)

URLURL - Predstavitvena datoteka, za dostop obiščite http://dx.doi.org/10.1016/j.expthermflusci.2007.05.002 Novo okno

Izvleček
This paper presents an experimental and CFD numerical study of convective heattransfer and flow field characteristics in a rotating rotor cascade. Surface temperature distribution on a rotating heated blade was measured by means of infrared thermography, which proved highly advantageous over standard temperature sensors due to its completely non-intrusive nature. The experimental facility, IR thermography method, and the CFD numerical model that was made according to the actual test rig geometry and operating conditions, are described in detail. For the present study, tests were carriedout in an iposonic flow regime at relatively low fluid temperatures, with the Rotational number varied and hot-to-cool air mass flow ratio and Reynolds number kept constant. Experimental and numerical results for the blade pressure side were found to be in good agreement. Analysis of the results focused on the influence of rotation and black paint thermal conductivity on heat transfer through the blade. The results, presented in terms of Nusselt number distribution along the blade midspan, show the influence of rotational number on convective heat transfer. Interpretation of numerical results showed that the black paint coating imposes additional thermal resistance to heat conduction, which can affect temperature distribution on the painted surfaces. With increasing rotational number and all other influential parameters kept constant, heat transfer intensifies, which is reflected in increased Nusselt numbers along the blade midspan.

Jezik:Angleški jezik
Ključne besede:prenos toplote, konvekcija, termografija infrardeča, numerične metode, Nusseltovo število, convective heat transfer, IR thermography, CFD numerical approach, rotating environment, Nusselt number
Vrsta gradiva:Delo ni kategorizirano (r6)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Leto izida:2007
Št. strani:str. 387-396
Številčenje:Letn. 32, št. 2
UDK:544.344.016.2:543.572.3
ISSN pri članku:0894-1777
COBISS.SI-ID:10121755 Povezava se odpre v novem oknu
Število ogledov:484
Število prenosov:108
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
 
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Gradivo je del revije

Naslov:Experimental thermal and fluid science
Skrajšan naslov:Exp. therm. fluid sci.
Založnik:Elsevier
ISSN:0894-1777
COBISS.SI-ID:170523 Novo okno

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