Shock wave driven by a phased implosion

Journal Article · Tue Jan 01 00:00:00 EST 1991 · Physics of Fluids A; (USA)

DOI:https://doi.org/10.1063/1.857854· OSTI ID:6045146

Menikoff, R; Lackner, K S; Johnson, N L; Colgate, S A; Hyman, J M ^[1]; Miranda, G A ^[2]

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1. Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (US)
2. Dynamic Testing Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA)

In this paper the theory of an axially phased radial implosion of a channel is developed. When the phase velocity of the implosion exceeds the sound velocity inside the channel, a planar shock wave traveling along the channel axis can develop. For the energy of the implosion system in the appropriate range, the theory predicts a stable steady-state flow configuration. The effect of the phased implosion is for the channel wall to form a nozzle that travels along the channel axis. The flow behind the axial shock is well described by the equations for nozzle flow with an additional dynamical degree of freedom for the shape of the wall. Experiments presented here verify the theoretical predictions. The numerical simulations show the formation of the axial shock during start-up and the approach to steady state to be in good agreement with experiment and theory. A potential application of the axially phased implosion is the design of a super shock tube.

• OSTI ID: 6045146
• Journal Information: Physics of Fluids A; (USA), Vol. 3:1; ISSN 0899-8213
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
42 ENGINEERING
IMPLOSIONS
PHASE VELOCITY
TUBES
CYLINDERS
DESIGN
DETONATIONS
HEXANE
NOZZLES
NUMERICAL ANALYSIS
SHOCK TUBES
SHOCK WAVES
SIMULATION
STABILITY
STEADY-STATE CONDITIONS
USES
ALKANES
HYDROCARBONS
MATHEMATICS
ORGANIC COMPOUNDS
VELOCITY
640410* - Fluid Physics- General Fluid Dynamics
420400 - Engineering- Heat Transfer & Fluid Flow