Abstract The demand for quieter vehicles is pushing manufacturers of components the automotive industry to seek solutions reduce overall noise emissions. cooling fan makes no exception: aerodynamic interaction blades with incoming flow generates turbulence and pressure fluctuations which ultimately translate into generation. A variety expedients have been introduced limit produced noise, but un...

Abstract The airfoil used in axial fan blades is one of the important factors that affect efficiency fan. In this paper, design process flow realized by FORTRAN language, and then traditional CAP2021 new high-performance CAP2021-Mod designed us are applied to fan, impellers two fans designed, results compared analyzed. Finally, CFD numerical simulation carried out, Aerodynamic performance field...

A multi-channel active control system has been applied to the reduction of free-field tonal noise from a small axial cooling fan, typical of those used in office equipment and other technology. The experimental apparatus consists of an aluminum enclosure which houses the fan, an infrared detector-emitter pair which serves as a reference sensor, loudspeakers, microphones, and appropriate filters...

This paper summarizes a case study example on the methodology used for phased array microphone measurements in a realistic acoustic environment. A ducted fan rotor is measured in an environment, where structure born noise and aerodynamically generated noise cannot be separated using conventional single microphone acoustic analysis. The conditions of the measurement are similar to an industrial ...

This paper presents a method for volumetric reconstruction from Helical Computerized Tomography (H-CT) data which are collected with a fan beam source. An interpretation of the HCT data in terms of the Axial Computerized Tomography (ACT) data is provided. This analysis indicates that the H-CT data for positive and negative detector angles can be combined to form periodically nonuniform hexagona...

The objective of this research is (1) to design and construct the wind turbine simulator based on the adjustable actual wind speed. (2) To investigate the wind distribution, and (3) tobe applied for testing the power output of the micro-wind turbine in the laboratory. Design and CAD drawing was applied to construct the wind turbine simulator prototype.The 3 phase induction motor with axial fan ...