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- W2078311105 abstract "Forward-looking recessed aperture interceptor has significant aero-optical and aero-thermal advantages. Previous experimental studies have shown that the flow field in front of a forward-looking cavity is unsteady and the bow shock oscillates at the cavity fundamental resonant frequency. In this study, an advanced CFD code is applied to study the above unsteady phenomena. The code is first validated against the experiments and good comparisons are found. The numerical parametric study shows that the existence of oscillatory bow shock is very sensitive to the cavity geometry. At a FOV of 60 deg, the initial transient quickly dampens out to a steady state. With a decrease of FOV, an unsteady oscillatory flow field is sustained after initial transient and the amplitude of oscillation is a function of FOV. For FOV of 20 deg, the amplitude of pressure oscillation is 25 percent of the mean value in the cavity. For a FOV of 10 deg, it can be as high as 50 percent." @default.
- W2078311105 created "2016-06-24" @default.
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- W2078311105 date "1993-01-11" @default.
- W2078311105 modified "2023-09-23" @default.
- W2078311105 title "Study of unsteady flow field over a forward-looking endoatmospheric hit-to-kill interceptor" @default.
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- W2078311105 doi "https://doi.org/10.2514/6.1993-501" @default.
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