Abstract
The flow field in a cavity that is attached to a supersonic duct at M=1.83 is computationally simulated. The basic characteristics of the cavity flow field and the effect of cavity dimensions (the length to depth ratio) are discussed. The computational results show good agreement with the experimental ones. From the numerical and the experimental results, time-averaged characteristics of the cavity flow fields are clarified. In the case of a longer cavity, the flow field is highly three-dimensional due to the effect of sidewalls. In the case of a shorter cavity, the flow field is essentially two-dimensional. The flow-in and flow-out mechanisms of the cavity are also clarified.
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