UFR 4-19 Evaluation: Difference between revisions
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= Converging-diverging transonic diffuser = | = Converging-diverging transonic diffuser = | ||
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|align="center"|'''Figure 9:''' Shock-waves positions and experimental measurements | |align="center"|'''Figure 9:''' Shock-waves positions and experimental measurements | ||
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===The weak Mach number case=== | |||
The modelling results of the three adopted turbulence models are compared with the | |||
available experimental data for the "weak" Mach number case in figs.10 and 11. | |||
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Revision as of 06:15, 13 April 2016
Converging-diverging transonic diffuser
Confined flows
Underlying Flow Regime 4-19
Evaluation
Comparison of CFD Calculations with Experiments
For both "weak" and "strong" Mach number cases,for comparison with the calculations, experimental data for four measurements stations after the shock-wave (h1, h2, h3, h4) are selected for the longitudinal velocity as well as pressure distributions along the bottom and the top wall of the diffuser. A representative figure of the shock-wave positions and the measurement stations is shown in fig.9.The x-location of the axial measurement stations are non-dimensionalized with the diffuser throat height,resulting in the following four stations: h1 = 2.822, h2 = 4.611, h3 = 6.340 and h4 = 7.493.
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| Figure 9: Shock-waves positions and experimental measurements |
The weak Mach number case
The modelling results of the three adopted turbulence models are compared with the available experimental data for the "weak" Mach number case in figs.10 and 11.
Contributed by: Z. Vlahostergios, K. Yakinthos — Aristotle University of Thessaloniki, Greece
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