Hydraulic drag of rod with artificial microroughness in longitudinal flow
Abstract
Results are presented from an experimental study of the hydraulic drag of a rod with artificial microroughness under isothermal conditions under a broad range of flow conditions. The rod was intended to imitate a circular fuel element with regularly alternating spots of microroughness of trapezoidal shape, with each projection 0.1 mm in height, 0.2 mm thick, relative spacing S/h = 10. The experiments were performed with turbulent flow of air in a circular slot between the tube shell with smooth inner surface and the coaxially inserted rough rod modeling the fuel element. An equation is derived which describes the experimentally hydraulic drag.
- Publication:
-
USSR Rept Eng Equipment JPRS UEQ
- Pub Date:
- February 1984
- Bibcode:
- 1984RpEE........74L
- Keywords:
-
- Drag;
- Hydraulic Equipment;
- Hydraulic Fluids;
- Roughness;
- Turbulent Flow;
- Isothermal Flow;
- Nuclear Fuel Elements;
- Rods;
- Slots;
- Fluid Mechanics and Heat Transfer