Theory of Detonation Structure for Two-Phase Materials
Powers, Joseph Michael
This item is only available for download by members of the University of Illinois community. Students, faculty, and staff at the U of I may log in with your NetID and password to view the item. If you are trying to access an Illinois-restricted dissertation or thesis, you can request a copy through your library's Inter-Library Loan office or purchase a copy directly from ProQuest.
Permalink
https://hdl.handle.net/2142/70159
Description
Title
Theory of Detonation Structure for Two-Phase Materials
Author(s)
Powers, Joseph Michael
Issue Date
1988
Doctoral Committee Chair(s)
Krier, Herman
Stewart, Donald S.
Department of Study
Mechanical Engineering
Discipline
Mechanical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Mechanical
Physics, Fluid and Plasma
Abstract
The structure of a two-phase steady detonation in a granulated solid propellant has been studied, and existence conditions for a one-dimensional, steady two-phase detonation have been predicted. Ordinary differential equations from continuum mixture theory have been solved numerically to determine steady wave structure. In the limiting case where there is no chemical reaction and no gas phase effects, the model describes inert compaction waves. The equations predict detonation structure when reaction and gas phase effects are included. In the limiting case where heat transfer and compaction effects are negligible, the model reduces to two ordinary differential equations which have a clear geometrical interpretation in a two-dimensional phase plane. The two-equation model predicts results which are quite similar to those of the full model which suggests that heat transfer and compaction are not important mechanisms in determining the detonation structure. It is found that strong and Chapman-Jouguet (CJ) detonation solutions with a leading gas phase shock and unshocked solid are admitted as are weak and CJ solutions with an unshocked gas and solid. The initial conditions determine which of these solutions is obtained. As for one-phase materials, the CJ wave speed is the speed of propagation predicted for an unsupported, one-dimensional, two-phase detonation. The model predicts that there is no physically admissible CJ structure below a critical value of initial bulk density. This result is not predicted from equilibrium end state analysis, and based on this result, it is concluded that it is essential to consider reaction zone structure.
Use this login method if you
don't
have an
@illinois.edu
email address.
(Oops, I do have one)
IDEALS migrated to a new platform on June 23, 2022. If you created
your account prior to this date, you will have to reset your password
using the forgot-password link below.
