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Aerodynamic noise characteristics depend on parameters like type and geometry of the fan, impeller diameter, rotational speed, fan operating point, connection
PART I: GENERAL ASPECTS OF AERODYNAMIC NOISE THEORY by H V FUCHS 1 Governing equations 2 Derivation of an inhomogeneous wave equation
The aerodynamic noise of rotating propellers or rotors of a compressor consists of the rota- tional and the vortex noise The rotational noise is a
BASIC PRINCIPLES OF AERODYNAMIC NOISE GENERATION D G CRIGHTON Department of Applied Mathematical Studies, University of Leeds, Leeds, England
linear acoustics, rotor noise, and diffraction theory The symposium was successful in bringing together several new themes in aerodynamic noise research
Until now it has been fairly difficult to measure accurately automobile aerodynamic noise in a wind flow us- ing a microphone, because of distur-
A Review of Aerodynamic Noise from Propellers, Rotors, and Lift Fans 1 Introduction The problem of aircraft noise and its annoyance to the