Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)
- Volume 22 Issue 11
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- Pages.1509-1520
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- 1998
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- 1226-4881(pISSN)
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- 2288-5324(eISSN)
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A Study on the Heat Transfer Phenomena in Coiled Tubes with Variable Curvature Ratios
곡률비가 다양한 코일 튜브에서의 열전달현상에 관한 연구
- Received : 1997.10.16
- Published : 1998.11.01
Abstract
An experiment was carried out for the fully developed turbulent flow of water in tube coils on the condition of uniform heat flux. The present work was conducted for various ranges for Dean number(1794~1321), Prandtl number (2.5~4.5), curvature ratio parameters (22~60). Heat transfer to steady viscous flow in coiled tubes of circular cross section was studied for fully developed velocity and temperature fields under the thermal boundary condition of uniform heat flux. The peripherally local Nusselt number correlated as a function of Dean and Prandtl numbers. We studied the flow in heat coiled tubes under the influence of both centrifugal and buoyancy forces in order to gain insight into the flow pattern. In the present study, we obtained three emperical formulas,
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