Development of a method of determining the transverse wave structure in a rigid wall axisymmetric duct

1985 ◽  
Vol 77 (5) ◽  
pp. 1921-1926 ◽  
Author(s):  
J. P. Pasqualini ◽  
J. M. Ville ◽  
J. F. de Belleval
Keyword(s):  
Transverse Wave ◽  
Wave Structure ◽  
Rigid Wall ◽  
Axisymmetric Duct

scholarly journals Numerical Studies on Propagation Mechanisms of Gaseous Detonations in the Inhomogeneous Medium

2020 ◽  
Vol 10 (13) ◽  
pp. 4585
Author(s):  
Jianguo Ning ◽  
Da Chen ◽  
Jian Li
Keyword(s):  
Inhomogeneous Medium ◽  
Transverse Wave ◽  
Early Stage ◽  
Detonation Front ◽  
Homogeneous Medium ◽  
Wave Structure ◽  
Reaction Model ◽  
Propagation Mechanism ◽  
Gaseous Detonations ◽  
Cellular Detonation

Numerical simulation of propagation mechanisms of gaseous detonations in the inhomogeneous medium is studied by using the reactive Euler equations coupled with a two-step chemical reaction model. The inhomogeneity is generated by placing artificial temperature perturbations with different wavelengths and amplitudes. The motivation is to investigate the effect of artificial perturbations on the evolution or amplification of cellular instability. The results show that, without artificial perturbations, a planar ZND detonation can evolve into a fully-developed cellular detonation after a distance because of the amplification of the cellular instability. With the artificial perturbations evolved in, at the early stage, the artificial perturbations control the transverse wave spacing by suppressing the amplification of the cellular instability. However, after a steady-state, the cellular instability starts to amplify itself again and eventually transits to a fully-developed cellular detonation. It is demonstrated that the presence of the artificial perturbations delays the formation of the cellular detonation, and the increase of instability factor can slow down this delay. It is also found that, if the wavelength of the artificial perturbations is close to the transverse wave spacing of the cellular detonation in the homogeneous medium, synchronization of these two factors occurs, and hence a cellular detonation with extremely regular cell pattern is immediately formed. The temperature discontinuity causes the front to be more turbulent with the presence of weak triple-wave structure locally besides the natural transverse waves. The artificial perturbations can increase the intrinsic instability, and hence changes the propagation mechanism of the detonation front. In contrast, large artificial perturbations could prohibit the propagation but reduce cellular instability. It is concluded that the competition of artificial perturbations with intrinsic detonation instability dominates the evolution of cellular structures of the detonation front.

Transverse wave structure in detonations

1967 ◽  
Vol 11 (1) ◽  
pp. 683-692 ◽  
Author(s):  
R.A. Strehlow ◽  
R. Liaugminas ◽  
R.H. Watson ◽  
J.R. Eyman
Keyword(s):  
Transverse Wave ◽  
Wave Structure

STUDY OF THE HEAD ON DETONATION WAVE STRUCTURE IN GASEOUS EXPLOSIVES

1987 ◽  
Vol 48 (C4) ◽  
pp. C4-119-C4-124
Author(s):  
H. N. PRESLES ◽  
P. BAUER ◽  
C. GUERRAUD ◽  
D. DESBORDES
Keyword(s):  
Detonation Wave ◽  
Wave Structure

SHEAR LAYER AND WAVE STRUCTURE OVER PARTIALLY SPANNING CAVITIES

2013 ◽  
Vol 20 (1-2) ◽  
pp. 111-123
Author(s):  
Rajarshi Das ◽  
Heuy Dong Kim ◽  
Job Kurian
Keyword(s):  
Shear Layer ◽  
Wave Structure

Sound as a transverse wave

2017 ◽  
Vol 13 (1) ◽  
pp. 4522-4534
Author(s):  
Armando Tomás Canero
Keyword(s):  
Quantum Mechanics ◽  
Gravitational Waves ◽  
Longitudinal Wave ◽  
Transverse Wave ◽  
Sound Propagation ◽  
Correspondence Principle ◽  
Classical Mechanics ◽  
Wave Model ◽  
Scientific Experiments

This paper presents sound propagation based on a transverse wave model which does not collide with the interpretation of physical events based on the longitudinal wave model, but responds to the correspondence principle and allows interpreting a significant number of scientific experiments that do not follow the longitudinal wave model. Among the problems that are solved are: the interpretation of the location of nodes and antinodes in a Kundt tube of classical mechanics, the traslation of phonons in the vacuum interparticle of quantum mechanics and gravitational waves in relativistic mechanics.

Modeling the interaction of a beam of elastic vibrations with the surface of an object under acoustic non-destructive testing

2020 ◽  
pp. 55-57
Author(s):  
N.P. Aleshin ◽  
M.V. Grigorev ◽  
N.V. Kryisko ◽  
A.G. Kusyiy
Keyword(s):  
Mathematical Model ◽  
Transverse Wave ◽  
Small Diameter ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Liquid Immersion ◽  
Elastic Transverse ◽  
Elastic Transverse Wave ◽  
Physical And Mathematical Models ◽  
Non Destructive

Physical and mathematical models are developed that describe the refraction by a concave cylindrical surface of a field of an elastic transverse wave arbitrarily incident on a surface from a liquid. Immersion control of a small-diameter pipeline is considered. Keywords acoustics, ultrasound, immersion control, physical and mathematical model, bent surface, small-diameter pipeline. [email protected]

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