New GSD Modeling for Air Blast Wave Supported by Non-Uniform Flow: I. Modeling
Abstract
The goal of this research is to find a way to model complex shock interactions using Geo-metrical Shock Dynamics (GSD) as a more efficient alternative to computationally expensive hydrocodes, such as the CTH. But "classical" GSD, as initially described by Whitham, describes shock propagations in which the ow immediately behind the shock front is uniform. Many other shock dynamics phenomena in air, such as the Taylor point blast wave, are not characterized by a uniform flow behind the shock, so Whitham's GSD (WGSD) theory cannot provide an accurate shock simulation. We thus have developed a new expanded GSD (EGSD) model that can portray shock propagation with a non-uniform ow state behind the shock, which can arise from Taylor point blast; from a finite-sized, condensed explosive detonation; etc. We show the accuracy and efficiency of the new model in this paper by showing excellent agreement in the relation between Mach number and shock radius among hydrocode simulations, GSD simulations and theory.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 2019
- Accession Number
- AD1075548
Entities
People
- George C. Butler
- Sunhee Yoo