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Numerical and experimental study on wave propagation in the open atmosphere

Link to publisher’s homepages at http://www.myiem.org.my/

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Main Authors: Mohammad, Ali Jinnah, Dr., Mohammad, Monjurul Ehsan
Other Authors: jinnah@iut-dhaka.edu
Format: Article
Language:English
Published: The Institution of Engineers, Malaysia (IEM) 2013
Subjects:
Euler equations
Wave visualization
Wave decay
Shock wave
Open Atmosphere
Online Access:http://dspace.unimap.edu.my/xmlui/handle/123456789/28659
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spelling my.unimap-286592013-10-08T13:24:12Z Numerical and experimental study on wave propagation in the open atmosphere Mohammad, Ali Jinnah, Dr. Mohammad, Monjurul Ehsan jinnah@iut-dhaka.edu mme.ehsan@gmail.com Euler equations Wave visualization Wave decay Shock wave Open Atmosphere Link to publisher’s homepages at http://www.myiem.org.my/ In the present research works, wave propagation in the open atmosphere has been investigated both numerically and experimentally. Two-dimensional (2D) numerical code has been developed to solve the Euler equations for the upstream and downstream parameters during the shock wave propagation in the open atmosphere. It is observed that due to decay of the shock strength, all parameters (velocity, pressure and density) in the upstream of the shock wave are decreased as increasing the travel time of the wave in the open atmosphere. It is seen 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 shock wave with supersonic speed by rupturing different types of diaphragms. The properties of diaphragm are the major factors to generate shock wave in the shock tube. It is observed that the properties of diaphragm like toughness and brittleness are the best properties in the present case. In the present experiment, transparent Raksin sheet and used X-ray film are selected as the diaphragm where used X-ray film has the better rupturing quality as compare to Raksin sheet. For measuring the wave speed, a time measuring technique has been developed to measure the wave travel time in the 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 the wave propagation in the open atmosphere, the wave speed decreases and the decay of the wave strength is observed. 2013-10-08T13:23:16Z 2013-10-08T13:23:16Z 2012-09 Article The Journal of the Institution of Engineers, Malayasia, vol. 73(3), 2012, pages 14-22 0126-513X http://www.myiem.org.my/content/iem_journal_2012-361.aspx http://hdl.handle.net/123456789/28659 en The Institution of Engineers, Malaysia (IEM)
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Euler equations
Wave visualization
Wave decay
Shock wave
Open Atmosphere
spellingShingle Euler equations
Wave visualization
Wave decay
Shock wave
Open Atmosphere
Mohammad, Ali Jinnah, Dr.
Mohammad, Monjurul Ehsan
Numerical and experimental study on wave propagation in the open atmosphere
description Link to publisher’s homepages at http://www.myiem.org.my/
author2 jinnah@iut-dhaka.edu
author_facet jinnah@iut-dhaka.edu
Mohammad, Ali Jinnah, Dr.
Mohammad, Monjurul Ehsan
format Article
author Mohammad, Ali Jinnah, Dr.
Mohammad, Monjurul Ehsan
author_sort Mohammad, Ali Jinnah, Dr.
title Numerical and experimental study on wave propagation in the open atmosphere
title_short Numerical and experimental study on wave propagation in the open atmosphere
title_full Numerical and experimental study on wave propagation in the open atmosphere
title_fullStr Numerical and experimental study on wave propagation in the open atmosphere
title_full_unstemmed Numerical and experimental study on wave propagation in the open atmosphere
title_sort numerical and experimental study on wave propagation in the open atmosphere
publisher The Institution of Engineers, Malaysia (IEM)
publishDate 2013
url http://dspace.unimap.edu.my/xmlui/handle/123456789/28659
_version_ 1643795529466904576
score 13.222552

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