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, 2020
Small axial fans are used for cooling electronic equipment and are often installed in a casing with various slits. Direct aeroacoustic simulations and experiments were performed with different casing opening ratios to clarify the effects of the flow ...
H. Yokoyama +4 more
semanticscholar +1 more source
Small axial fans are used for cooling electronic equipment and are often installed in a casing with various slits. Direct aeroacoustic simulations and experiments were performed with different casing opening ratios to clarify the effects of the flow ...
H. Yokoyama +4 more
semanticscholar +1 more source
Reversing of Axial Flow Fans for Ventilation
Volume 4: Cycle Innovations; Fans and Blowers; Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Marine; Oil and Gas Applications, 2011Changing the flow direction in fans is frequently required in emergency situations in traffic tunnels, chemical plants and mines ventilation. Reverse flow in axial flow fan is often achieved using two methods: a) Changing direction of fan rotation and turning the stator vanes (Method I).
Vaclav Cyrus, Jiri Pelnar, Jan Cyrus
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Noise generation in axial flow fans
Journal of Sound and Vibration, 1966Abstract An empirical equation for fan noise is presented. The equation predicts, with fair accuracy, the noise of several fan configurations tested, yielding noise spectra over the frequency range 40 to 10,000 Hz at various fan speeds and over the measurable range of fan performance characteristics.
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Performance Testing of an Axial Flow Fan Designed for Air-Cooled Heat Exchanger Applications
Journal of Engineering For Gas Turbines and Power, 2018An axial flow fan developed in the previous study is tested in order to characterize its performance. The M-fan, a 7.3152 m diameter rotor only axial flow fan was designed to perform well under the challenging operating conditions encountered in air ...
M. Wilkinson +2 more
semanticscholar +1 more source
Visualisation of rotating stall in an axial flow fan
Experimental Thermal and Fluid Science, 2014Abstract Visualisation of a flow field was performed within the rotor blade passage of an axial flow fan operating under rotating stall conditions. A PIV system was used to capture the velocity field at an 80% span of the rotor blade. PIV triggering was synchronized with the observed blades’ passing, and over 1000 PIV images were obtained. These were
Matej Fike +3 more
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Reducing the Aerodynamic Noise of the Axial Flow Fan with Perforated Surface
Social Science Research Network, 2023M. Yadegari +3 more
semanticscholar +1 more source
An investigation of axial flow fan noise
Journal of Sound and Vibration, 1966Abstract Measurements of noise from fans designed for military vehicle cooling installations have been made. Two fan rotors in particular have been run under varied test conditions. The main parameters investigated were tip speed, tip clearance, back pressure, blade stagger angle, the presence of inlet and outlet struts, and number of blades.
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Sources of noise in axial flow fans
Journal of Sound and Vibration, 1964Abstract The various possible mechanisms of noise generation in axial flow fans are described. Quantitative expressions have been derived for the sources of broad band noise by dimensional arguments, from which orders of magnitude estimates have been made.
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Flutter of a Fan Blade in Supersonic Axial Flow
Journal of Turbomachinery, 1989An application of a simple aeroelastic model to an advanced supersonic axial flow fan is presented. Lane’s cascade theory is used to determine the unsteady aerodynamic loads. Parametric studies are performed to determine the effects of mode coupling, Mach number, damping, pitching axis location, solidity, stagger angle, and mistuning.
R. E. Kielb, J. K. Ramsey
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