V.O.Gorban, I.M.Gorban Theoretical study of near-wall flow control schemes that employ interceptors |
Applied hydromechanics, Vol. 2 (74) ¹ 2, (2000) |
| The paper considers techniques for a flow control near bodies based on application of special plates, interceptors, that can be mounted on the body surface. To derive the flow regimes when the interceptor is able to generate a large-scale stable vortex near the surface, topological analysis of the flow pattern was carried out by numerical methods. It included determination of critical points of the flow field and their type at different flow conditions. Numerical simulations of separated flows behind the interceptors were also done by the discrete vortex method. An inclined interceptor was obtained to form the vortex of neutral stability. Parameters of the vortex, coordinates, circulation and eigenfrequency, were obtained against the angle of inclination. To strengthen the vortex stability, it is proposed to apply the suction of fluid from the separation zone. This flow modification was shown to lead to change of critical point type. The intensity of the suction was evaluated for the different flow conditions, when one, two or a set of interceptors were disposed on the surface. |
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KEY WORDS: *** |
| TEXT LANGUAGE: Ukrainian |