Control of Instability Waves in an Unexcited Turbulent Jet Using Plasma Actuators in a Narrow Frequency Band

2021 ◽  
Vol 67 (4) ◽  
pp. 413-420
Author(s):  
V. F. Kopiev ◽  
O. P. Bychkov ◽  
V. A. Kopiev ◽  
G. A. Faranosov ◽  
I. A. Moralev ◽  
...  
Keyword(s):  
Frequency Band ◽  
Turbulent Jet ◽  
Plasma Actuators ◽  
Instability Waves ◽  
Narrow Frequency Band

Instability waves and aerodynamic noise in a subsonic transitional turbulent jet

2016 ◽  
Vol 57 ◽  
pp. 192-203 ◽  
Author(s):  
Zhen-Hua Wan ◽  
Hai-Hua Yang ◽  
Xing-Chen Zhang ◽  
De-Jun Sun
Keyword(s):  
Turbulent Jet ◽  
Aerodynamic Noise ◽  
Instability Waves

scholarly journals An evaluation of linear instability waves as sources of sound in a supersonic turbulent jet

2002 ◽  
Vol 14 (10) ◽  
pp. 3593-3600 ◽  
Author(s):  
Kamran Mohseni ◽  
Tim Colonius ◽  
Jonathan B. Freund
Keyword(s):  
Linear Instability ◽  
Turbulent Jet ◽  
Instability Waves

scholarly journals Digital filter based on chaos theory used for removing narrow-frequency-band noise in PD signals

2020 ◽  
Vol 2020 (13) ◽  
pp. 357-360
Author(s):  
Tianyan Jiang ◽  
Baimei Wang ◽  
Maoqiang Bi ◽  
Xi Chen ◽  
Shouhua Cheng ◽  
...  
Keyword(s):  
Frequency Band ◽  
Digital Filter ◽  
Chaos Theory ◽  
Band Noise ◽  
Narrow Frequency Band

Narrow‐frequency band acoustic transducer

1985 ◽  
Vol 78 (3) ◽  
pp. 1156-1156
Author(s):  
Iwao Sashida ◽  
Tsutomu Haga
Keyword(s):  
Frequency Band ◽  
Acoustic Transducer ◽  
Narrow Frequency Band

scholarly journals A Broadband Vibration-Based Energy Harvester Using an Array of Piezoelectric Beams Connected by Springs

2016 ◽  
Vol 2016 ◽  
pp. 1-13 ◽  
Author(s):  
V. Meruane ◽  
K. Pichara
Keyword(s):  
Frequency Band ◽  
Energy Harvester ◽  
Experimental Measurements ◽  
Bernoulli Beam ◽  
Significant Drop ◽  
Energy Harvesters ◽  
Advantages And Disadvantages ◽  
Narrow Frequency Band ◽  
Cantilevered Beams ◽  
Euler Bernoulli Beam

Piezoelectric cantilevered beams have been widely used as vibration-based energy harvesters. Nevertheless, these devices have a narrow frequency band and if the excitation is slightly different there is a significant drop in the level of power generated. To handle this problem, the present investigation proposes the use of an array of piezoelectric cantilevered beams connected by springs as a broadband vibration-based energy harvester. The equations for the voltage and power output of the system are derived based on the analytical solution of the piezoelectric cantilevered energy harvester with Euler-Bernoulli beam assumptions. To study the advantages and disadvantages of the proposed system, the results are compared with those of an array of disconnected beams (with no springs). The analytical model is validated with experimental measurements of three bimorph beams with and without springs. The results show that connecting the array of beams with springs allows increasing the frequency band of operation and increasing the amount of power generated.

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