scholarly journals Numerical Study of Shock Wave Attenuation in Two-Dimensional Ducts Using Solid Obstacles: How to Utilize Shock Focusing Techniques to Attenuate Shock Waves

Aerospace ◽  
2015 ◽  
Vol 2 (2) ◽  
pp. 203-221 ◽  
Author(s):  
Qian Wan ◽  
Veronica Eliasson
Keyword(s):  
Shock Wave ◽  
Shock Waves ◽  
Wave Attenuation ◽  
Numerical Study ◽  
Two Dimensional ◽  
Shock Focusing ◽  
Shock Wave Attenuation ◽  
Solid Obstacles

Experimental and numerical study of shock wave attenuation at the outlet of two-dimensional and axisymmetric ducts

1993 ◽  
Vol 28 (4) ◽  
pp. 590-593 ◽  
Author(s):  
T. V. Bazhenova ◽  
S. B. Bazarov ◽  
O. V. Bulat ◽  
V. V. Golub ◽  
A. M. Schul'meister
Keyword(s):  
Shock Wave ◽  
Wave Attenuation ◽  
Numerical Study ◽  
Two Dimensional ◽  
Shock Wave Attenuation

Features of spatial shock-wave flows in vapor-gas-liquid mixtures

2014 ◽  
Vol 10 ◽  
pp. 27-31
Author(s):  
R.Kh. Bolotnova ◽  
U.O. Agisheva ◽  
V.A. Buzina
Keyword(s):  
Shock Wave ◽  
High Pressure ◽  
Shock Waves ◽  
Liquid Mixture ◽  
Liquid Mixtures ◽  
Pressure Vessels ◽  
Water Mixture ◽  
Two Dimensional ◽  
Nonstationary Processes ◽  
Two Phase

The two-phase model of vapor-gas-liquid medium in axisymmetric two-dimensional formulation, taking into account vaporization is constructed. The nonstationary processes of boiling vapor-water mixture outflow from high-pressure vessels as a result of depressurization are studied. The problems of shock waves action on filled by gas-liquid mixture volumes are solved.

A simple constitutive model for predicting the pressure histories developed behind rigid porous media impinged by shock waves

2013 ◽  
Vol 718 ◽  
pp. 507-523 ◽  
Author(s):  
O. Ram ◽  
O. Sadot
Keyword(s):  
Shock Wave ◽  
Porous Medium ◽  
Porous Media ◽  
Shock Waves ◽  
Constitutive Model ◽  
Wave Attenuation ◽  
Front Face ◽  
Viscous Effects ◽  
Pressure History ◽  
Target Wall

AbstractShock wave attenuation by means of rigid porous media is often applied when protective structures are dealt with. The passage of a shock wave through a layer of porous medium is accompanied by diffractions and viscous effects that attenuate and weaken the transmitted shock, thus reducing the load that develops on the target wall that is placed behind the protective layer. In the present study, the parameters governing the pressure build-up on the target wall are experimentally investigated using a shock tube facility. Different porous samples are impinged by normal shock waves of various strengths and the subsequent pressure histories that are developed on the target wall are recorded. In addition, different standoff distances from the target wall are investigated. Assuming that the flow through the porous medium is close to being isentropic enabled us to develop a general constitutive model for predicting the pressure history developed on the target wall. This model can be applied to predict the pressure build-up on the target wall for any pressure history that is imposed on the front face of the porous sample without the need to conduct numerous experiments. Results obtained by other investigators are found to be in very good agreement with the predictions of the presently developed constitutive model.

Shock Wave Attenuation by Perforated Plates with Various Hole Sizes

1977 ◽  
Author(s):  
Charles Kingery ◽  
Richard Pearson ◽  
George Coulter
Keyword(s):  
Shock Wave ◽  
Wave Attenuation ◽  
Perforated Plates ◽  
Shock Wave Attenuation

Shock wave attenuation using rigid obstacles with large- and small-scale geometrical features

2019 ◽  
Vol 2 (4) ◽  
pp. 269-279
Author(s):  
Alexander Ivanov ◽  
Nicolas Fassardi ◽  
Christina Scafidi ◽  
Tal Shemen ◽  
Veronica Eliasson
Keyword(s):  
Shock Wave ◽  
Wave Attenuation ◽  
Small Scale ◽  
Shock Wave Attenuation ◽  
Geometrical Features

scholarly journals Nonsteady Shock Wave Attenuation Due to Leakage

Energies ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 3275
Author(s):  
Chenyuan Liu ◽  
Huoxing Liu
Keyword(s):  
Shock Wave ◽  
Boundary Value Problem ◽  
Wave Attenuation ◽  
Initial Boundary ◽  
Initial Boundary Value Problem ◽  
Leakage Flow ◽  
Shock Wave Attenuation ◽  
Wave Rotors ◽  
Loss Prediction ◽  
Initial Boundary Value

Leakage flow between the rotor and the stator can cause serious performance degradation of wave rotors which utilize nonsteady shock waves to directly transfer energy from burned gases to precompressed air. To solve this problem, primary flow features relevant to leakage are extracted and it was found that the leakage-attributed performance degradation could be abstracted to a special initial-boundary value problem of one-dimensional Euler equations. Then, a general loss assessment method is proposed to solve the problem of nonsteady flow loss prediction. Using the above method, a reasonable physical hypothesis of the initial-boundary value problem depicting the nonsteady leakage flow process is proposed and further, a closed-form leakage loss analytical model combined with an empirical correction method for the discharge coefficient is established. Finally, with the experimentally verified CFD method, comprehensive numerical verification is conducted for the loss prediction model; it is proved that the physical hypothesis of the proposed model in this paper is reasonable and the model is capable of predicting nonsteady shock wave attenuation due to leakage exactly within the range of parameter variations of wave rotors.

Sign in / Sign up

Export Citation Format

Share Document