Large Blast and Thermal Simulator Reflected Wave Eliminator Study.

摘要

The design of a reflected wave eliminator (RWE) for the Large Blast/Thermal Simulator was investigated. Activities were divided into two categories, theoretical and computer modeled analysis, and conceptual design of RWE candidate configurations. The design effort was concentrated on active REWs where the open area changes over the time of the blast wave simulation. The computer analysis served to determine the rate of these area changes. Three different concepts were evaluated for the design of an active RWE. Stresses were analyzed and the power requirements to properly move the RWE during the passage of the blast wave were estimated. Two louver concepts were found to be lighter weight and more easily moved than a radial fan concept. A rotating louver design was recommended for further study. In addition, vents in the side wall of the LB/TS near the RWE were recommended in order to provide the maximum open area needed. Keywords: Large blast thermal simulator; Blast wave simulator; Rarefraction wave eliminator; Blast wave shaping; Shock tube flow; Wave reflections; Comp. fluid dynamics. (jhd)