Georgiy Nikolaevich Dudin

Bio: Georgiy Nikolaevich Dudin is an academic researcher from Moscow Institute of Physics and Technology. The author has contributed to research in topics: Boundary layer & Flow (mathematics). The author has an hindex of 1, co-authored 4 publications receiving 4 citations.

The Effect of Pressure Disturbances on the Heating of the Plate Surface in the Strong Interaction Regime

Abstract: The results of an experimental wind-tunnel investigation of the plate surface heating in the strong viscous-inviscid interaction regime are presented. It is shown that In the presence of a wedge mounted in the vicinity of the trailing edge of the plate the temperature distribution over the plate surface ahead of the wedge considerably changes up to the leading edge, as compared with the case of flow past the same plate in the absence of the wedge. The boundary layer flow is not steady, since during the run the surface temperature grows continuously, the temperature distribution itself along the plate surface being variable. It is established that in an unsteady boundary layer the upwind propagation of pressure disturbances produced by a thin wedge is fundamentally different in nature from the disturbance propagation in the case of flow past a plate with a constant surface temperature.

Temperature Factor Effect on the Disturbance Propagation in Hypersonic Flow past a Yawed Flat Plate

Abstract: The flow in the three-dimensional laminar boundary layer on a yawed flat plate of finite length is studied in the regime of strong viscous-inviscid interaction with a hypersonic flow. In the vicinity of the leading edge the flow functions are expanded in series under the assumption that the base pressure dependent on the transverse coordinate is given at the trailing edge of the plate. It is established that the expansions obtained include an indefinite function and its derivative with respect to the transverse coordinate. The corresponding boundary value problems are formulated and numerically solved, the eigenvalues are found, and it is shown that the exponent in the third term of the expansion differs from that in the second term only by one. The plate surface temperature effect on the flow parameters and the initiation of three-dimensional disturbances is investigated.

Flow past a delta wing in the strong viscous-inviscid interaction regime

Abstract: Three-dimensional laminar boundary layer flow over a planar delta wing with the span of the order of unity is investigated in the strong interaction regime. The flow functions are expanded in power series in the transverse coordinate in the vicinities of the plane of symmetry of the wing and its leading edge. The induced pressure over the wing span is determined by matching the expansions obtained and compared with the results of the numerical finite-difference solution of the boundary layer equations in partial derivatives.

Methods of Controlling Flows under the Strong Hypersonic Interaction Conditions

Abstract: The methods of the flow control in a laminar boundary layer at local surface cooling are studied. The dependence of the velocity of disturbance propagation upstream on the temperature factor of the body surface is obtained. The methods of controlling the boundary layer flow under the strong viscous-inviscid interaction conditions by means of suppressing the upstream disturbance propagation are investigated.