scholarly journals In- and out-of-plane longitudinal acoustic-wave velocities and elastic moduli in h-BN from Brillouin scattering measurements

2018 ◽  
Vol 112 (5) ◽  
pp. 051905 ◽  
Author(s):  
R. J. Jiménez-Riobóo ◽  
L. Artús ◽  
R. Cuscó ◽  
T. Taniguchi ◽  
G. Cassabois ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Elastic Moduli ◽  
Brillouin Scattering ◽  
Longitudinal Acoustic ◽  
Wave Velocities ◽  
Longitudinal Acoustic Wave ◽  
Scattering Measurements ◽  
Out Of Plane

Longitudinal acoustic wave radiated from an arched interdigital transducer

1981 ◽  
Vol 52 (8) ◽  
pp. 5386-5388 ◽  
Author(s):  
Kenichi Kobayashi ◽  
Toyosaka Moriizumi ◽  
Kohji Toda
Keyword(s):  
Acoustic Wave ◽  
Longitudinal Acoustic ◽  
Longitudinal Acoustic Wave ◽  
Interdigital Transducer

scholarly journals Flame response of solid propellant AP/Al/HTPB to a longitudinal acoustic wave

2017 ◽  
Vol 9 (4) ◽  
pp. 241-259 ◽  
Author(s):  
Hichem Rezaiguia ◽  
Peijin Liu ◽  
Tianhao Yang
Keyword(s):  
Acoustic Wave ◽  
Solid Propellant ◽  
High Speed ◽  
Surface Profile ◽  
Combustion Products ◽  
Longitudinal Acoustic ◽  
Longitudinal Acoustic Wave ◽  
Flame Response ◽  
Hot Products ◽  
Propellant Surface

This paper is devoted to an experimental work which consists of the analysis of the flame of a small solid propellant sample, AP/Al/HTPB, subjected to a longitudinal acoustic wave. Experiments were conducted in a closed tube under two mean pressures: 1 and 2.5 MPa. The qualitative and quantitative analysis of the flame snapshots, using a microscope and a high-speed camera, revealed that the acoustic wave created at the end of the chamber by a pulser system strongly affects the flame and the combustion products dynamic above the solid propellant surface, namely, the flame and the hot products oscillate around a line perpendicular to the propellant surface. This dynamic of the hot gas disturbs the local burning rate and the regression surface profile. Thus, the thrust and the burning duration will change, therefore, the flight path of the rocket may shift and can lead to failure of the mission.

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