INTENSIFICATION OF VENTILATION OF very LONG COAL LONGWALL WHEN USING A JET FAN INSTALLED ON A SHEARER

2021 ◽  
Vol 8 (2) ◽  
pp. 216-222
Author(s):  
S. A. Pavlov
Keyword(s):  
Jet Fan

scholarly journals Túneles con paramentos rugosos y con cavidades

2014 ◽  
Vol 15 (1) ◽  
pp. 58
Author(s):  
Gabriele Vigne ◽  
Jimmy Jönsson ◽  
Fernando Hacar
Keyword(s):  
Jet Fan

En muchas ocasiones las superficies finales de los túneles de carretera (tanto los hastiales, como la bóveda) resultan no solo con rugosidades uniformes importantes, también con huecos más o menos numerosos y más o menos considerables: generalmente en túneles sin revestir es donde más se presentan las irregularidades uniformes importantes, y en túneles en roca excavados con voladuras es donde más se manifiestan los huecos. Esto da lugar a coeficientes de fricción con las paredes del túnel que pueden ser muy elevados. La fricción que se produce al paso del aire en la ventilación puede dar lugar a necesidades de empujes aerodinámicos (con ventilación con jet-fan) muy importantes, esto es, a consumos de energía eléctrica significativos. Para túneles de carretera con ventilación longitudinal con jet-fan se analizan las pérdidas de carga de túneles rugosos y con cavidades, y se evalúan los empujes aerodinámicos necesarios para contrarrestar las correspondientes pérdidas de carga.

Aerodynamics Performances of Tunnel Jet Fan and its Passage Components Design

2013 ◽  
Vol 325-326 ◽  
pp. 310-314 ◽  
Author(s):  
Di Lin Pan ◽  
Kai Chen
Keyword(s):  
Design Process ◽  
Flow Resistance ◽  
Rational Design ◽  
Static Pressure ◽  
Internal Flow ◽  
Aerodynamic Design ◽  
Road Tunnels ◽  
Jet Fan ◽  
Ventilation Systems

Jet fans are widely used in ventilation systems of road tunnels, railway tunnels and subways etc. It was demonstrated that the static pressure generated by jet fan impeller is merely useful for overcoming its own internal flow resistance and can not improve the ventilation state of tunnel. It was pointed out that in the aerodynamic design process, the static pressure of jet fan should be made as small as possible. The effective way to reduce static pressure produced by impeller is the rational design of jet fan passage components.

CFD analysis on ventilation characteristics of jet fan with different pitch angle

2014 ◽  
Vol 18 (3) ◽  
pp. 812-818 ◽  
Author(s):  
Seung-Chul Lee ◽  
Seungho Lee ◽  
Juhee Lee
Keyword(s):  
Pitch Angle ◽  
Cfd Analysis ◽  
Jet Fan

COMMON HANGING BRACKET CONSIDERING STANDARDIZATION FOR DIVERTING AND INSALLING JET FAN

2020 ◽  
Vol 76 (2) ◽  
pp. I_157-I_168
Author(s):  
Osamu KAWATE ◽  
Kengo OBAMA ◽  
Kiyoyuki KAITO ◽  
Hirokazu MIYATA
Keyword(s):  
Jet Fan

Novel correlation to evaluate the pressure losses for different traffic jam conditions in road tunnel with alternative jet fan, second part

2020 ◽  
Vol 96 ◽  
pp. 103213 ◽  
Author(s):  
Marilena Musto ◽  
Furio Cascetta ◽  
Carmine D'Alessandro ◽  
Davide De Maio ◽  
Giuseppe Rotondo
Keyword(s):  
Road Tunnel ◽  
Pressure Losses ◽  
Traffic Jam ◽  
Jet Fan

J0450405 Fault detection method using vibration analysis for operating ventilator jet fan

2014 ◽  
Vol 2014 (0) ◽  
pp. _J0450405--_J0450405-
Author(s):  
Kenta Kawahara ◽  
Kouji Yamamoto ◽  
Atsushi Kobayashi ◽  
Takatoshi Yamagishi ◽  
Atsushi Iwasaki
Keyword(s):  
Fault Detection ◽  
Vibration Analysis ◽  
Detection Method ◽  
Jet Fan

The Experimental Investigation of Jet Fan Aerodynamics Using Wind Tunnel Modeling

1996 ◽  
Vol 118 (2) ◽  
pp. 322-328 ◽  
Author(s):  
K. R. Mutama ◽  
A. E. Hall
Keyword(s):  
Experimental Investigation ◽  
Pressure Drop ◽  
Wind Tunnel ◽  
Initial Pressure ◽  
Tunnel Wall ◽  
Tunnel Ventilation ◽  
Significant Length ◽  
Complete Set ◽  
Jet Fan ◽  
Jet Oscillation

Jet fan aerodynamic behavior was investigated using wind tunnel modeling. Conditions were created to simulate mine and vehicular tunnel ventilation where these fans are finding increased application. Results showed that the ability of a jet fan to entrain air depends on its proximity to the tunnel wall. Moving the jet fan toward the wall increased the initial pressure drop below ambient in a significant length of the tunnel. This increased the volume of air entrained despite the existence of a large recirculation eddy or back flow whose size diminished as the jet fan was traversed toward the tunnel axis. When the jet fan was located at the tunnel axis the flow was very unstable close to the walls of the tunnel and it had a tendency to reverse itself with periods coinciding with the jet oscillation behavior. The complete set of measurements obtained are suitable for CFD code validation and modeling.

0219 Performance Characteristics of Synthetic Jet Fan

2015 ◽  
Vol 2015 (0) ◽  
pp. _0219-1_-_0219-3_
Author(s):  
Itsumi Eguchi ◽  
Tomoaki Ishizawa ◽  
Kotaro sato ◽  
Koichi Nishibe ◽  
Kazuhiko Yokota
Keyword(s):  
Synthetic Jet ◽  
Performance Characteristics ◽  
Jet Fan
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