Results 241 to 250 of about 239,240 (300)

Leakage flow flutter in a low-speed axial-flow fan with shrouded blades

Journal of Sound and Vibration, 2020
A large-amplitude axial vibration of a rotor fan with shrouded blades has been experimentally observed. The analysis of the Campbell diagram shows that the vibration is related to a backward-whirl vibrational mode of the rotor which is always present ...
L. Carassale, A. Cattanei, F. Zecchin, M. Moradi   +3 more
semanticscholar   +1 more source

Performance Degradation and Flow Instability of Axial-Flow Fan Due to Upstream Obstacle

, 2020
This paper elucidates the performance degradation and flow instability of an axial fan caused by the presence of disk-shaped obstacles upstream of the fan, such as wall surfaces. The increase in pressure loss and the decrease in shaft power coefficient
D. Kang, T. Shinohara, Shinsaku Nakamura, K. Nishibe, Kotaro Sato, K. Yokota, H. Ohue   +6 more
semanticscholar   +1 more source

Compressible Simulation of Flow and Sound Around a Small Axial-Flow Fan With Flow Through Casing Slits

, 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, K. Minowa, Kohei Orito, M. Nishikawara, H. Yanada   +4 more
semanticscholar   +1 more source

Axial Fan at Reversal Flow

Volume 5: Turbo Expo 2004, Parts A and B, 2004
Flow reversal in axial fans is usually performed by the change of revolution direction and by stator vanes turning. Derived relations express the relative position of characteristics curves for reverse and normal flows. The ratio of volume flow rates at these conditions decreases with rotor blade profiles camber (aerodynamic loading) and with flow ...
openaire   +1 more source

Noise and Efficiency of Axial-Flow Fans

SAE Technical Paper Series, 1970
<div class="htmlview paragraph">A test apparatus was constructed and instrumented for testing tractor engine cooling fans in an environment simulating actual operating conditions. Tests were conducted to investigate the influence of the blade pitch angle, blade camber and fan rotational speed on the air delivery performance, the input power ...
J. W. Hummel, J. A. Weber
openaire   +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, 2011
Changing 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
openaire   +1 more source

Flow characteristics of axial fan with shroud

Journal of Fluid Machinery, 2008
Axial fan without static blades requires the duct as a guidance for unskewed inflows. This work examined the geometric effects of a duct guided the in and out flows through an impeller. The present methodologies are computational predictions with parallel work by experimental validation. Several different positions of a rotor in a duct are proposed for
openaire   +1 more source

The Design and Performance of an Axial-Flow Fan

Journal of Fluids Engineering, 1934
Abstract This paper deals with the design and performance of an axial-flow fan for comparatively high pressures. The design is based largely on extensive investigations of the air flow through a fan of well-known design which yielded certain constants.
Lionel S. Marks, John R. Weske
openaire   +1 more source

Characteristics of Axial Flow Fan with Diagonal Flow Hub

SAE Technical Paper Series, 1990
<div class="htmlview paragraph">For the combination of radiator and fan working under high flow resistance of radiator system, “the Axial Flow Fan with Diagonal Flow Hub” has been developed.</div> <div class="htmlview paragraph">A study of the useful ranges of the cone angle of diagonal hub and depth of fan, two dimensionless shape ...
Tadashi Mizuno, Koichiro Kikuchi
openaire   +1 more source

Performance Testing of an Axial Flow Fan Designed for Air-Cooled Heat Exchanger Applications

Journal of Engineering For Gas Turbines and Power, 2018
An 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, J. V. D. Spuy, T. V. Backström   +2 more
semanticscholar   +1 more source