A dynamic drag reduction device

Abstract

The invention discloses a dynamic drag reducing device, which comprises a base, a plurality of first grooves opened in the base which are arranged at regular intervals in sequence, and set on the groove wall of the first groove and used to communicate with adjacent first grooves. The first through hole of the groove, the second through hole opened on both sides of the base and used to communicate with the two outermost first grooves in one-to-one correspondence, the flexible layer, and a plurality of sequentially spaced and evenly arranged concave holes in the flexible layer. The second groove in the layer, the control mechanism; the flexible layer is sealed and attached to the top of the base, and the second grooves are located in the first groove one by one; the control mechanism is used periodically: through the second groove on one side The medium is introduced into the base through the through hole, and the medium is extracted from the base through the second through hole on the other side; so that the second groove undergoes periodic deformation. A dynamic drag reduction device of the present invention adopts a dynamic flexible layer, which greatly enhances the effect of turbulent flow drag reduction; the deformation of the dynamic flexible layer is controllable, and can make adaptive changes according to different surrounding environments.

Description

technical field [0001] The invention relates to the technical field of skin drag reduction of underwater vehicles, in particular to a dynamic drag reduction device. Background technique [0002] Turbulent drag reduction is a hot topic in fluid mechanics research. In recent years, the development of micro-electro-mechanical system technology has provided the possibility for the practical application of active control of turbulent drag reduction, among which the intelligent skin with arbitrarily deformable wall surface is considered to be the key technology. Inspired by the non-smooth shape of the desert surface, the accompanying wave surface, as a newly proposed popular structure in recent years, provides a new way for the development of non-smooth surface drag reduction, and also provides more possible options for practical engineering applications. However, most previous studies only studied the drag reduction effect of the static traveling wave wall, which is only effecti...

AI Technical Summary

Problems solved by technology

However, most previous studies only studied the drag reduction effect of the static accompanying wave wall, which is only effective for a specific situation, with a narrow application range and relatively poor drag reduction effect

Images