Proceedings of the KSME Conference (대한기계학회:학술대회논문집)
- 2003.04a
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- Pages.2211-2218
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- 2003
EFFECTS OF RIB ARRANGEMENTS AND ROTATION ON HEAT TRANSFER IN A ROTATING TWO-PASS DUCT
회전덕트에서 요철 배열 및 회전수 변화에 따른 열전달 특성
- Published : 2003.04.23
Abstract
The present study investigates heat/mass transfer characteristics in a rotating two-pass duct for smooth and ribbed surfaces. The duct has an aspect ratio of 0.5 and a hydraulic diameter of 26.67 mm. 70-angled rib turbulators are attached on the leading and trailing sides of the duct in parallel and cross arrangements. The pitch-to-rib height ratio is 7.5 and the rib height-to-hydraulic diameter ratio is 0.075. The Reynolds number based on the hydraulic diameter is constant at 10,000 and the rotation number ranges from 0.0 to 0.2 Detailed local heat/mass transfer coefficients are measured using a naphthalene sublimation technique. The results show that the secondary flows generated by the
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