Enhancement in Gas Pumping in a Square Channel With Two-Stage Corona Wind Generator

2014 ◽  
Vol 50 (4) ◽  
pp. 2296-2305 ◽  
Author(s):  
A. K. M. Monayem Hossain Mazumder ◽  
F. C. Lai
Keyword(s):  
Two Stage ◽  
Square Channel ◽  
Wind Generator ◽  
Gas Pumping ◽  
Corona Wind

Enhanced Forced Convection in a Square Channel With Two-Stage Corona Wind Generator

2012 ◽  
Author(s):  
A. K. M. Monayem H. Mazumder ◽  
F. C. Lai
Keyword(s):  
Heat Transfer ◽  
Boundary Layer ◽  
Thermal Management ◽  
Forced Convection ◽  
Two Stage ◽  
Maximum Enhancement ◽  
Square Channel ◽  
Wind Generator ◽  
Wide Range ◽  
Corona Wind

In this study, enhancement in forced convection inside a square channel by a two-stage electrohydrodynamic (EHD) gas pump has been examined by numerical simulations. The EHD gas pump with 28 emitting electrodes in each stage has been evaluated for a wide range of operating voltages starting from the corona threshold voltage up to 28 kV for further improvement in its performance over that of a single-stage. To achieve the maximum enhancement in heat transfer, the emitting electrodes of the corona wind generator are flush mounted on the channel walls so that the corona wind produced directly perturbs the boundary layer. The results show that EHD technique has a great potential for applications in thermal management.

Flow Characteristics in a Channel With Corona Wind Generator

2010 ◽  
Author(s):  
J. Zhang ◽  
F. C. Lai
Keyword(s):  
Volume Flow Rate ◽  
Three Dimensional ◽  
Flow Characteristics ◽  
Operating Conditions ◽  
Square Channel ◽  
Wind Generator ◽  
Numerical Predictions ◽  
Wide Range ◽  
Flow Transport ◽  
Corona Wind

Electrohydrodynamically induced flows have shown great potential for many engineering applications. Previous studies have revealed that a corona wind generator can be used to enhance flow transport in a channel. In this study, a corona wind generator with emitting wire electrodes flush mounted on the channel walls is considered for a wide range of operating conditions. Specifically, three configurations of the generator (with 4, 12, and 28 pins of emitting electrodes) are evaluated for their effectiveness in delivering the air flow. To investigate the flow characteristics inside a square channel, three-dimensional governing equations for electric and flow fields are numerically solved. The corona current is first measured experimentally and used in the numerical calculations. Numerical predictions on the velocity profile of corona-induced air flows as well as the volume flow rate delivered have been successfully verified by experimental results.

EHD-Induced Flow in a Square Channel With Two-Stage Electrodes

2012 ◽  
Author(s):  
A. K. M. Monayem H. Mazumder ◽  
F. C. Lai ◽  
Y.-T. Chou
Keyword(s):  
Maximum Velocity ◽  
Gas Flows ◽  
Transfer Enhancement ◽  
Two Stage ◽  
Square Channel ◽  
Wide Range ◽  
Cooling Fans ◽  
Induced Flow ◽  
Conventional Cooling ◽  
Better Than

In this study flow field inside a square channel with a two-stage electrohydrodynamic (EHD) gas pump has been critically examined by experimental measurement and numerical simulation. The EHD gas pump with 28 emitting electrodes in each stage is tested for a wide range of operating voltages starting from the corona threshold voltage up to 28 kV for further improvement in its performance over that of a single-stage. It has been shown that the two-stage EHD gas pump can produce and sustain gas flows with a maximum velocity of 5 m/s. Its maximum performance of 34 L/s/W is better than that of conventional cooling fans used in personal computers. The implication for its application in thermal management and heat transfer enhancement has also been discussed.

Flow Induced by a Two Stage Electrohydrodynamic Gas Pump in a Square Channel

2021 ◽  
Author(s):  
A.K.M. Monayem Mazumder ◽  
Grace Trombley ◽  
Brendon Cusinio
Keyword(s):  
Two Stage ◽  
Square Channel

Heat Transfer Enhancement for Flows in a Channel With Corona Wind Generator

2010 ◽  
Author(s):  
J. Zhang ◽  
F. C. Lai
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
Operating Conditions ◽  
Temperature Fields ◽  
Transfer Enhancement ◽  
Power Requirement ◽  
Maximum Enhancement ◽  
Wind Generator ◽  
Wind Generators ◽  
Corona Wind

Heat transfer enhancement using corona wind generators in a square channel has been numerically examined in this study. Three configurations of the corona wind generators (separately with 4, 12, and 28 pins) are investigated for their effectiveness in the enhancement of heat transfer as well as the pumping power requirement. To achieve the maximum enhancement in heat transfer, the emitting electrodes of the corona wind generator are flush mounted on the channel walls so that the corona wind produced directly perturbs the boundary layer. The Reynolds number considered varies in a range between 200 and 2000. The influence of electric field on the flow and temperature fields is examined for a wind range of operating conditions. The results show that EHD technique has a great potential for many engineering applications.

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