Active control of a centrifugal fan in a mock laptop enclosure

2011 ◽  
Vol 130 (4) ◽  
pp. 2564-2564
Author(s):  
J. James Esplin ◽  
John K. Boyle ◽  
Scott D. Sommerfeldt ◽  
Kent L. Gee
Keyword(s):  
Active Control ◽  
Centrifugal Fan

scholarly journals Active control of axial and centrifugal fan noise

2013 ◽  
Author(s):  
Scott D. Sommerfeldt ◽  
Kent L. Gee
Keyword(s):  
Active Control ◽  
Centrifugal Fan ◽  
Fan Noise

Simulation of air jets for controlling stall in a centrifugal fan

2014 ◽  
Vol 229 (11) ◽  
pp. 2045-2055 ◽  
Author(s):  
Zhang Lei ◽  
Wang Rui ◽  
Yuan Wei ◽  
Wang Songling
Keyword(s):  
Active Control ◽  
Stokes Equations ◽  
Control Method ◽  
Safety Margin ◽  
Stability Margin ◽  
Rotating Stall ◽  
Enhancement Effect ◽  
Centrifugal Fan ◽  
Stall Inception ◽  
Active Control Method

The main goal of the present work is to analyze the three-dimensional unsteady flow field of a centrifugal fan by solving Navier–Stokes equations, coupled with the throttle condition. The results show that rotating stall occurs in the original fan when the flow rate is 4.30 m3/s, and the stall inception first appears at three impeller passages near the volute tongue and front disc. An active control method is proposed to inhibit the stall inception, which involves blowing air at the inlets of the three impeller passages. This blowing control method cannot inhibit the stall inception when the blowing speed is lower than 50 m/s. The stability margin of the centrifugal fan is extended when the blowing speed is increased from 50 to 110 m/s, while no further effect is obvious with a further increase in the blowing speed. At a blowing speed of 110 m/s, rotating stall occurs again when the fan flow reaches 3.46 m3/s. After the application of the nozzle blowing, the safety margin of the centrifugal fan is extended by 13%, and an obvious stability enhancement effect is achieved. From an engineering standpoint, this new active control method for rotating stall offers a valuable means to ensure the safe operation of a centrifugal fan.

Active control of centrifugal fan noise: Modeling design guidelines.

2011 ◽  
Vol 129 (4) ◽  
pp. 2584-2584 ◽  
Author(s):  
J. James Esplin ◽  
John K. Boyle ◽  
Scott D. Sommerfeldt ◽  
Kent L. Gee
Keyword(s):  
Active Control ◽  
Design Guidelines ◽  
Centrifugal Fan ◽  
Fan Noise ◽  
Noise Modeling

Active control of axial and centrifugal fan noise

2013 ◽  
Vol 133 (5) ◽  
pp. 3264-3264
Author(s):  
Scott D. Sommerfeldt ◽  
Kent L. Gee
Keyword(s):  
Active Control ◽  
Centrifugal Fan ◽  
Fan Noise

Active control of centrifugal fan noise: Experimental results.

2011 ◽  
Vol 129 (4) ◽  
pp. 2584-2584 ◽  
Author(s):  
John K. Boyle ◽  
J. James Esplin ◽  
Scott D. Sommerfeldt ◽  
Kent L. Gee
Keyword(s):  
Active Control ◽  
Experimental Results ◽  
Centrifugal Fan ◽  
Fan Noise

Active control of centrifugal fan noise: Modeling design guidelines

2011 ◽  
Author(s):  
J. James Esplin ◽  
John K. Boyle ◽  
Scott D. Sommerfeldt ◽  
Kent L. Gee
Keyword(s):  
Active Control ◽  
Design Guidelines ◽  
Centrifugal Fan ◽  
Fan Noise ◽  
Noise Modeling

Performance Evaluation of Linear Oscillatory Actuator for Active Control Engine Mount

2012 ◽  
Vol 132 (12) ◽  
pp. 1091-1096 ◽  
Author(s):  
Fumiya Kitayama ◽  
Katsuhiro Hirata ◽  
Yasuyoshi Asai
Keyword(s):  
Performance Evaluation ◽  
Active Control ◽  
Engine Mount
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