Author:
IGRA O.,WU X.,FALCOVITZ J.,MEGURO T.,TAKAYAMA K.,HEILIG W.
Abstract
The complex flow and wave pattern following an initially planar shock wave
transmitted through a double-bend duct is studied experimentally and theoretically/numerically.
Several different double-bend duct geometries are investigated
in order to assess their effects on the accompanying flow and shock wave attenuation
while passing through these ducts. The effect of the duct wall roughness on the shock
wave attenuation is also studied. The main flow diagnostic used in the experimental
part is either an interferometric study or alternating shadow–schlieren diagnostics.
The photos obtained provide a detailed description of the flow evolution inside the
ducts investigated. Pressure measurements were also taken in some of the experiments.
In the theoretical/numerical part the conservation equations for an inviscid,
perfect gas were solved numerically. It is shown that the proposed physical model
(Euler equations), which is solved by using the second-order-accurate, high-resolution
GRP (generalized Riemann problem) scheme, can simulate such a complex, time-dependent
process very accurately. Specifically, all wave patterns are numerically
simulated throughout the entire interaction process. Excellent agreement is found
between the numerical simulation and the experimental results. The efficiency of a
double-bend duct in providing a shock wave attenuation is clearly demonstrated.
Publisher
Cambridge University Press (CUP)
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics
Cited by
64 articles.
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