
Accession Number : ADA320936
Title : Characterization of Jet Flow From a Decaying Wave Blast Simulator.
Descriptive Note : Final rept.,
Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
Personal Author(s) : Schraml, Stephen J.
PDF Url : ADA320936
Report Date : JAN 1997
Pagination or Media Count : 43
Abstract : A computational study was performed to characterize the timedependent jet flow exiting the expansion tunnel of the large blast/thermal simulator (LB/TS). The aerodynamic environment produced by the jet flow has been identified as a possible means of testing full scale military equipment in high drag blast events. Twodimensional (2D) axisymmetric calculations were used to estimate the peak pressure, velocity, and impulse levels in the jet flow as a function of the initial conditions. Next, a set of 2D planar symmetry calculations was performed to assess the effect of the ground plane on the flow field and determine the changes in flow parameters as a function of distance from the exit plane. Finally, a set of threedimensional (3D) calculations was used to generate a detailed description of the timedependent flow and to determine its spatial uniformity for vehicle testing. The 3D calculation simulating the maximum operational limit of the facility resulted in a peak flow velocity of approximately 420 m/s in an event with a duration of approximately 1.2 s.
Descriptors : *SIMULATORS, *BLAST WAVES, *SHOCK TUBES, PEAK VALUES, COMPUTATIONS, TIME DEPENDENCE, OVERPRESSURE, THREE DIMENSIONAL, FLOW FIELDS, FLOW RATE, AXISYMMETRIC, EXPANSION, BLAST, JET FLOW, DYNAMIC PRESSURE.
Subject Categories : Explosions
Distribution Statement : APPROVED FOR PUBLIC RELEASE