간극이 있는 복합 덕트에서 국부 누셀트수와 온도분포 측정
The Measurement of Local Nusselt Number and Temperature Field in the Compound Duct with Gap
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Local Nusselt number and temperature field distribution within the compound duct with gap have been measured. Measurement of air and wall temperature span a range of gap width from 2mm to 6mm. Also, the Reynolds number is variated from 20,000 to 40,0000. In order to observe the correlations between gap width and turbulent heat transfer, the present measurement has tried to verify the enhancement effect of heat transfer when a gap exists within the compound channel. From this measurement, we could see that the pulsating flow has generated a strong turbulent flow mixing within the compound channel. And the turbulent flow mixing in the pulsating flow plays an effective role of enhancing the Nusselt number by making the fluid temperature uniformly within the compound channel.
Abstract
Local Nusselt number and temperature field distribution within the compound duct with gap have been measured. Measurement of air and wall temperature span a range of gap width from 2mm to 6mm. Also, the Reynolds number is variated from 20,000 to 40,0000. In order to observe the correlations between gap width and turbulent heat transfer, the present measurement has tried to verify the enhancement effect of heat transfer when a gap exists within the compound channel. From this measurement, we could see that the pulsating flow has generated a strong turbulent flow mixing within the compound channel. And the turbulent flow mixing in the pulsating flow plays an effective role of enhancing the Nusselt number by making the fluid temperature uniformly within the compound channel.
참고문헌 (5)
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- 신종근, "벽면을 통해 유체 유출입을 수반하는 평행 평판유동에서 난류열전달의 예측", 한국기계기술학회지, 11(1), pp.1~8 (2009), 한국기계기술학회
- Seong-Ho Hong, "Turbulent heat transfer characteristics in compound channels with gap", Journal of Mechanical Science and Technology, 25(9), pp.2217~2225 (2011), 대한기계학회