scholarly journals Numerical and reduced-scale experimental investigation of blast wave shape in underground transportation infrastructure

2015 ◽  
Vol 94 ◽  
pp. 96-104 ◽  
Author(s):  
Olivier Pennetier ◽  
Mame William-Louis ◽  
André Langlet
Keyword(s):  
Experimental Investigation ◽  
Blast Wave ◽  
Transportation Infrastructure ◽  
Wave Shape ◽  
Underground Transportation ◽  
Reduced Scale

Reduced-scale experimental investigation on ventilation performance of a local exhaust hood in an industrial plant

2015 ◽  
Vol 85 ◽  
pp. 94-103 ◽  
Author(s):  
Yanqiu Huang ◽  
Yi Wang ◽  
Li Liu ◽  
Peter V. Nielsen ◽  
Rasmus L. Jensen ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Industrial Plant ◽  
Exhaust Hood ◽  
Ventilation Performance ◽  
Reduced Scale

Experimental Investigation of a Capillary Pumped Loop Towards Its Integration on a Scientific Microsatellite

2002 ◽  
Author(s):  
R. R. Riehl ◽  
H. V. R. Camargo ◽  
L. Heinen ◽  
E. Bazzo
Keyword(s):  
Molecular Weight ◽  
Experimental Investigation ◽  
Heat Load ◽  
Experimental Tests ◽  
Working Fluid ◽  
Capillary Pumped Loop ◽  
Load Range ◽  
Ultra High Molecular Weight ◽  
Reduced Scale ◽  
Fast Responses

This paper presents the experimental investigation of a capillary pumped loop (CPL) to be integrated on a scientific microsatellite. Tests in laboratory have been focused on the thermal behavior of a CPL on a reduced scale, using UHMW (Ultra High Molecular Weight) polyethylene as porous structure and anhydrous ammonia as working fluid. The experimental tests have shown that the proposed CPL presents reliable startups when operating on a heat load range between 20 and 50 W, also presenting very short transients when operating on different heat load profiles. Very fast responses of the CPL have been verified for sudden changes on the heat load applied to the capillary evaporator with reduced superheat. The proposed CPL will be part of a payload to be integrated on a Scientific Microsatellite scheduled to be launch in early 2004.

Blast Wall Shielding Effectiveness

2017 ◽  
Author(s):  
Jihui Geng ◽  
J. Kelly Thomas
Keyword(s):  
Blast Wave ◽  
High Explosive ◽  
Blast Loading ◽  
Blast Waves ◽  
Shielding Effectiveness ◽  
Wave Shape ◽  
Mitigation Option ◽  
Blast Damage ◽  
Wave Parameters ◽  
Vapor Cloud

Blast walls are frequently considered as a potential mitigation option to reduce the applied blast loading on a building or structure in cases where unacceptably high levels of blast damage are predicted. There are three general explosion types of interest with respect to blast loading: High Explosive (HE), Pressure Vessel Burst (PVB), and Vapor Cloud Explosion (VCE). The blast waves resulting from these explosion types can differ significantly in terms of blast wave shape and duration. The effectiveness of a blast wall depends on these blast wave parameters (shape and duration), as well as the blast wall parameters (e.g., height, width and standoff distance from the protected structure). The effectiveness of a blast wall in terms of mitigating the blast loading on a protected structure depends on the combination of the blast wave and blast wall parameters. However, little guidance is available on the effectiveness of blast walls as a mitigation option for non-HE explosion sources. The purpose of this paper is to characterize the effect of blast wave parameters on the effectiveness of a blast wall and to provide guidance on how to determine whether a blast wall is an effective and practical blast damage mitigation option for a given blast loading.

scholarly journals Experimental Investigation of a Novel Blast Wave Mitigation Device

2006 ◽  
Author(s):  
Zhenbi Su ◽  
Zhaoyan Zhang ◽  
George Gogos ◽  
Reed Skaggs ◽  
Bryan Cheeseman ◽  
...  
Keyword(s):  
Shock Wave ◽  
Experimental Investigation ◽  
Wave Propagation ◽  
Blast Wave ◽  
Hopkinson Bar ◽  
Honeycomb Structure ◽  
Experimental Results ◽  
Maximum Pressure ◽  
Propagation Process ◽  
Piston Cylinder

A novel blast wave mitigation device was investigated experimentally in this paper. The device consists of a piston-cylinder assembly. A shock wave is induced within the cylinder when a blast wave impacts on the piston. The shock wave propagates inside the device and is reflected repeatedly. The shock wave propagation process inside the device lengthens the duration of the force on the base of the device to several orders of magnitude of the duration of the blast wave, while it decreases the maximum pressure by several orders of magnitude. Two types of experiments were carried out to study the blast wave mitigation device. The first type of experiments was done with honeycomb structures protected by the blast wave mitigation device. Experimental results show that the device can adequately protect the honeycomb structure. A second type of experiments was done using a Hopkinson bar to measure the pressure transmitted through the blast wave mitigation device. The experimental results agree well with results from a theoretical model.

scholarly journals A study of the blast wave shape from elongated VCEs

2016 ◽  
Vol 44 ◽  
pp. 614-625 ◽  
Author(s):  
Jihui Geng ◽  
Kelly Thomas ◽  
Quentin Baker
Keyword(s):  
Blast Wave ◽  
Wave Shape

scholarly journals Experimental investigation of blast wave propagation in an urban environment

2017 ◽  
Vol 49 ◽  
pp. 248-265 ◽  
Author(s):  
C. Fouchier ◽  
D. Laboureur ◽  
L. Youinou ◽  
E. Lapebie ◽  
J.M. Buchlin
Keyword(s):  
Experimental Investigation ◽  
Wave Propagation ◽  
Urban Environment ◽  
Blast Wave ◽  
Blast Wave Propagation
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