Investigation of aerodynamic characteristics from the airflow angle of the rotating cylinder

Abstract

Cylindrical body is classically an integral element of almost all aero-hydrodynamic devices and heat exchangers. Particular interest presents aerodynamic features with transverse flow and simultaneous rotation around the cylinder's axis. The analytical calculation of the longitudinal flow past short cylinders with spherical ends, even when flowing around an ideal liquid is complicated. Therefore, to qualitatively evaluate the length of the cylinder on the aerodynamics' flow around the rotating cylinder from the the bevel's angle of the air flow is considered. The paper presents the results of experimental studies to determine the lifting force and the lift coefficient. The results of the beam angle's influence on the aerodynamic characteristics of rotating cylinders are given. The results showed that the reduction in the lift factor is observed at the bevel's angles of over 300, so within the bevel angles –300≤α≤300 the windmill element in the form of a rotating cylinder works efficiently. The results of experimental studies can be used to develop wind turbines with blades in the form of rotating cylinders with a smooth surface. The results of the lift from the bevel angle of the flow, which varied from 00 tо 900, are shown in the paper.