Experimental Study of the Momentum Coupling Coefficient with the Pulse Frequency and Ambient Pressure for Air-Breathing Laser Propulsion

2006 ◽  
Author(s):  
Zhiping Tang
Keyword(s):  
Experimental Study ◽  
Coupling Coefficient ◽  
Ambient Pressure ◽  
Pulse Frequency ◽  
Air Breathing ◽  
Laser Propulsion ◽  
Momentum Coupling

Enhancement of momentum coupling coefficient by cavity with toroidal bubble for underwater laser propulsion

2013 ◽  
Vol 113 (6) ◽  
pp. 063107 ◽  
Author(s):  
Jun Chen ◽  
Bei-Bei Li ◽  
Hong-Chao Zhang ◽  
Hao Qiang ◽  
Zhong-Hua Shen ◽  
...  
Keyword(s):  
Coupling Coefficient ◽  
Laser Propulsion ◽  
Toroidal Bubble ◽  
Underwater Laser ◽  
Momentum Coupling

Experimental study of horizontal flame spread over rigid polyurethane foam on a plateau: effects of sample width and ambient pressure

2014 ◽  
Vol 39 (2) ◽  
pp. 127-138 ◽  
Author(s):  
Y. Zhou ◽  
H. H. Xiao ◽  
J. H. Sun ◽  
X. N. Zhang ◽  
W. G. Yan ◽  
...  
Keyword(s):  
Experimental Study ◽  
Polyurethane Foam ◽  
Flame Spread ◽  
Ambient Pressure ◽  
Rigid Polyurethane Foam ◽  
Sample Width

scholarly journals Experimental study of the effect of ambient pressure on oscillating behavior of pool fires

Energy ◽  
2020 ◽  
Vol 203 ◽  
pp. 117783 ◽  
Author(s):  
Jian Chen ◽  
Wai Cheong Tam ◽  
Wei Tang ◽  
Chao Zhang ◽  
Changhai Li ◽  
...  
Keyword(s):  
Experimental Study ◽  
Ambient Pressure ◽  
Pool Fires

Experimental Study on Restart Control of a Supersonic Air-Breathing Engine

2004 ◽  
Vol 20 (2) ◽  
pp. 273-279 ◽  
Author(s):  
Takayuki Kojima ◽  
Tetsuya Sato ◽  
Shujiro Sawai ◽  
Nobuhiro Tanatsugu
Keyword(s):  
Experimental Study ◽  
Air Breathing

scholarly journals Experimental Study on Anti-Icing Performance of NS-DBD Plasma Actuator

2018 ◽  
Vol 8 (10) ◽  
pp. 1889 ◽  
Author(s):  
Jie Chen ◽  
Hua Liang ◽  
Yun Wu ◽  
Biao Wei ◽  
Guangyin Zhao ◽  
...  
Keyword(s):  
Experimental Study ◽  
Heat Dissipation ◽  
Ccd Camera ◽  
Liquid Water Content ◽  
Pulse Frequency ◽  
Plasma Actuator ◽  
Voltage Amplitude ◽  
Dbd Plasma ◽  
Naca0012 Airfoil ◽  
Actuation Signal

An experimental study was conducted to evaluate the anti-icing performance of NS-DBD plasma actuator under the conditions of airflow speed U = 65 m/s, ambient temperature T = −10 °C, liquid water content LWC = 0.5 g/m3, mean-volume diameter MVD = 25 μm, mainly to clarify the effect of pulse frequency and voltage amplitude of actuation on anti-icing performance. A NACA0012 airfoil model with a chord length of c = 280 mm was used in the tests. The NS-DBD plasma actuator was mounted at the front part of the airfoil. A FLIR infrared (IR) imager and CCD camera were used to record the anti-icing process of the NS-DBD plasma actuator. Two typical discharge conditions were selected for the anti-icing experiments. The first was HV-LF discharge, corresponding to discharge under higher voltage amplitude with lower pulse frequency; the second was LV-HF discharge, corresponding to discharge under lower voltage amplitude with higher pulse frequency. Results reveal that NS-DBD is a very promising method for anti-icing. With the same power consumption, the LV-HF discharge shows a better anti-icing performance compared to HV-LF discharge under the same icing conditions. In view of pulse duration and duty circle, combined with heat dissipation, it is suggested that there is a threshold frequency, corresponding to the voltage amplitude of electric actuation signal and the incoming flow condition, to achieve effective anti-icing performance.

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