Valve Opening-Time Requirements for LB/TS (Large Blast/Thermal Simulator)
Abstract
The Ballistic Research Laboratory (BRL) of the U.S. Army is designing a Large Blast/Thermal Simulator (LB/TS), which is a proposed facility for creating pressure and thermal transients like those that occur near nuclear explosions. The LB/TS is basically a large shock tube, with area changes along its length. Unlike a conventional shock tube, which uses rupture diaphragms to separate the high pressure driver region from the low pressure driver region, it is desirable to utilize fast-opening valves in the LB/TS for wave shaping purposes as well as operational efficiency. However, with real valves, a finite opening time results in a compression wave with a finite rise time. The question then arises as to whether the compression wave will steepen to an adequate shock profile within the specified wave propagation distance, to simulate the desired blast wave. Keywords: Computational flow, Variable-area shock tubes, Rapid opening valves, Blast-wave simulation, Shock formation, Valve opening time.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 29, 1988
- Accession Number
- ADA201417
Entities
People
- G. D. Lassahn
- R. A. Berry