Supersonic flow modes of annular cavities at angles of attack


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Experimental studies of supersonic flow around axisymmetric annular cavities on pointed cylindrical bodies at angles of attack have been carried out. Unambiguous and ambiguous modes of flow around the cavity were observed in a wide range of changes in the determining parameters (relative length of the cavity L/h, angle of attack α). Reversible and irreversible switching of flow modes in the cavity occurred with a continuous change in the determining parameters. In a closed cavity, with an increase in the angle of attack, a local increase in pressure on the leeward side of the rear projection was recorded, exceeding the pressure on the windward side of the same projection.

axisymmetric cavity, supersonic flow, angle of attack, flow separation, hysteresis

DOI: http://doi.org/10.33257/PhChGD.24.3.1046


Volume 24, issue 3, 2023 year


Режимы сверхзвукового обтекания кольцевых каверн под углами атаки

Проведены экспериментальные исследования сверхзвукового обтекания осесимметричных кольцевых каверн на заостренных цилиндрических телах под углами атаки. В широком диапазоне изменения определяющих параметров (относительная протяженность каверны, угол атаки) наблюдались однозначные и неоднозначные режимы обтекания каверны. При непрерывном изменении определяющих параметров происходили обратимые и необратимые переключения режимов обтекания каверны. При увеличении угла атаки в замкнутой каверне зарегистрировано локальное повышение давления на подветренной стороне заднего уступа, превышающее по величине давление на наветренной стороне того же уступа кольцевой каверны.

осесимметричная каверна, сверхзвуковой поток, угол атаки, отрыв потока, гистерезис

DOI: http://doi.org/10.33257/PhChGD.24.3.1046


Volume 24, issue 3, 2023 year



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