Abstract
The propagation of a planar shock wave through a “Y” bifurcation duct system is both experimentally and numerically studied. Experiments were conducted in an 80 × 80 mm square shock tube section at atmospheric pressure, for incident planar shock waves having Mach numbers of 1.12 and 1.36, respectively. We show that the pressure prevailing behind the reflected shock wave from the end wall of the Y-shaped duct is less than half of what exists behind a reflected shock wave from a similar straight duct under the same initial conditions. Furthermore, numerical results allow pointing out that the expansion ratio of the cross-sectional area where the shock wave propagates is a preponderant parameter in attenuating the strength of a shock wave compared to the duct geometry.
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