Publicado 4 números por año
ISSN Imprimir: 1065-3090
ISSN En Línea: 1940-4336
Indexed in
THE EFFECT OF A SWIRLER ON THE HEAT TRANSFER COEFFICIENT OF FLOW IN A RECTANGULAR DUCT USING THERMOCHROMIC LIQUID CRYSTALS
SINOPSIS
This paper presents a study on the heat transfer coefficient of flow in a rectangular duct with a swirler using thermochromic liquid crystals. The experiments were conducted in the purpose- built perspex rectangular duct with an aspect ratio of 1:5. One side of the duct was heated by an electrical heater which generated a uniform constant heat flux over the surface. The variation of the Reynolds number was 13,000−24,000. Thermochromic liquid crystals were sprayed on the top of the duct surface forming a temperature sensitive layer. Swirlers with vane angles of 30°, 45°, and 60° to the flow axis were used in the experiment. From the results obtained, it was found that the thermal performance of the air flow through the rectangular duct with a 60°−swirler is the best among those used in this study.