Study of the Flow Around a Heated Cylinder in Mixed Convection Regime
Overhead Lines (OHL) are a key component to transmit and distribute electrical energy. The aero-thermal design of OHL is generally carried out considering the cable as a perfect heated cylinder immersed in a uniform cross flow (IEEE standard for calculating the current-temperature relationship of bare overhead conductors, 2013, ). Moreover, The design also assumes that only two regimes can occur, depending on the Reynolds number (based on the line diameter and the incoming velocity): (a) natural convection for low velocities, e.g. below a wind speed of 0.6 m/s which roughly corresponds to a Reynolds number of 850; (b) forced convection at higher Reynolds numbers. In both of these cases analytical correlations exist to compute the Nusselt number.
The authors are grateful for financial support by the Hartree Centre and the UK Engineering and Physical Sciences Research Council (EPSRC) under grants EP/L000261/1, EP/N016602/1 and EP/K038427/1.
- 1.IEEE Standard for Calculating the Current-Temperature Relationship of Bare Overhead Conductors. In: IEEE Std 738-2012 (Revision of IEEE Std 738-2006 - Incorporates IEEE Std 738-2012 Cor 1-2013), pp. 1–72 (2013)Google Scholar
- 2.Zdravkovich, M.M.: Flow Around Circular Cylinders Volume 1: Fundamentals. Oxford University Press, Oxford (1997)Google Scholar
- 4.Archambeau, F., Mechitoua, N., Sakiz, M.: Code_Saturne: a finite volume code for the computation of turbulent incompressible flows - industrial applications. Int. J. Finite 1 (2004)Google Scholar
- 6.van Steenhoven, A.A., Rindt, C.C.M.: Flow transition behind a heated cylinder. Int. J. Heat Fluid Flow 24, 322–333 (2003)Google Scholar