Mach Reflection of a Detonation Wave, H2:O2:Ar / 2:1:7, T0 =298 K, p0 =10.0 kPa
A regular oscillating two-dimensional solution of a H
2:O
2:Ar Chapman-Jouguet detonation with molar ratios 2:1:7 at
T0 =298 K and
p0 =10.0 kPa (
lig approx. 0.87 mm, detonation cell width 1.6 cm) is calculated in advance. An appropriate snapshot is reproduced periodically to reasonably approximate the flow situation in a larger detonation tube. This solution is rotated and approaches the lower boundary (fixed wall). If the inflow angle is sufficiently small, a Mach reflection of a detonation forms that suppresses the regular transverse oscillation.
Godunov-splitting is used for the incorporation of the source term and for the dimensional extension of a hybrid Roe-HLL scheme with MUSCL reconstruction. Automatic time step adjustment for C
CFL = 0.95, Van Albada-limiter, 20 Pts/L
1/2. Dynamic adaptive mesh refinement with
AMROC with five additional refinement levels (refinement factors 2,2,2,2,4). The computational times were 1100 to 1600 h CPU time on Pentium-III 850 MHz.
Subsections
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RalfDeiterding - 08 Jan 2005