Numerical and Experimental Investigation of Shock wave Propagation in the Open Atmosphere

Ehsan, Mohammad Monjurul

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dc.contributor.author	Ehsan, Mohammad Monjurul
dc.date.accessioned	2021-10-14T06:24:06Z
dc.date.available	2021-10-14T06:24:06Z
dc.date.issued	2012-11-15
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[45] Yanchao Shi, Hong Hao and Zhong-Xian Li (2007) Numerical simulation of blast wave interaction with structure columns. Shock Waves Journal, Vol. 17: 113-33. [46] O. Igra, L. Wang, J. Falcovitz and W. Heilig (1998) Shock wave propagation in a branched duct. Shock Waves Journal, Vol. 8: 375-81. [47] Lee S, Lele SK, Moin P (1993) Direct numerical simulation of isotropic turbulence interacting with a weak shock wave. Journal of Fluid Mechanics 251: 533-62 [48] Rotman D (1991) Shock wave effects on a turbulent flows. Phys. Fluids A3: 1792-806 102 [49] Jinnah MA (2005) Numerical and experimental study of Shock/Turbulent flow interaction. Doctor Thesis, Tohoku University. [50] Numata D., Ohtani K. and Takayama K. (2009) Diffuse holographic interferometric observation of shock wave reflection from a skewed wedge, Shock Waves, 19: 103-112. [51] Saito T., Takayama K. (1999) Numerical simulations of nozzle starting process, Shock Waves, 9: 73-79.	en_US
dc.identifier.uri	http://hdl.handle.net/123456789/1210
dc.description	Supervised by Dr. Mohammad Ali Jinnah, Associate Professor, Department Of Mechanical and Chemical Engineering (MCE), Islamic University Of Technology (IUT), Board Bazar, Gazipur-1704, Bangladesh.	en_US
dc.description.abstract	Shock wave propagation in the open atmosphere has been investigated both numerically and experimentally. Three-dimensional numerical code has been used to solve the Euler equations for the upstream and downstream parameters during propagation in the open Atmosphere. It is observed that due to decay of the shock strength, all parameters (velocity, pressure and density) are decreased with increasing the travel time of the wave in the open Atmosphere. It is found from the numerical images that the propagation of the shock front in the open Atmosphere is spherical in shape. An experiment has been conducted by a horizontal shock tube to generate subsonic wave as well as supersonic shock wave by rupturing different types of diaphragm. The material properties of diaphragm are the major factor to generate shock wave in a shock tube. It is observed that the material properties like toughness and brittleness are the best properties in the present case. In this experiment, transparent Raksin sheet and used X-ray film earlier are used where X-ray film gives the better performance as compare to Raksin for better rupture. For measuring the wave speed in the open Atmosphere, a time measuring technique has been developed to measure the wave travel time in open Atmosphere and it is simple in use and accurate in measurement as compare to other complicated technique like wave visualization by High Speed Video camera. During wave propagation, the wave speed decreases with increasing the travel time in open Atmosphere. So decreasing the speed indicates that the decay of the wave strength is normal phenomena during propagation in the open Atmosphere. In the present study, both experimental and numerical techniques are applied successfully to determine the decay of the wave strength.	en_US
dc.language.iso	en	en_US
dc.publisher	Department of Mechanical and Production Engineering (MPE),Islamic University of Technology(IUT), Board Bazar, Gazipur, Bangladesh	en_US
dc.title	Numerical and Experimental Investigation of Shock wave Propagation in the Open Atmosphere	en_US
dc.type	Thesis	en_US