Air floatation supporting device with one-dimensional degree of freedom and air seal

Abstract

The invention discloses an air floatation supporting device with a one-dimensional degree of freedom and an air seal. A model support, air floating shafts and air floating bearings are arranged in a sealing cover to form an air floating platform. The model support is erected between the pair of air floating shafts, the air floating shafts are supported by the air floating bearings, the air floating shafts are in sliding fit with the air floating bearings, and an aircraft model with one-dimensional freedom degree is arranged below the model support; and an outlet of the gas pressure source supplies gas to the air bearing and the sealing cover through the two precise pressure reducing valves respectively. The air floatation supporting device is installed on a long groove, and the long grooveis formed in an upper cover plate of a water tunnel or wind tunnel experiment section and is perpendicular to the incoming flow direction. The aircraft model penetrates through the long groove and isimmersed into the fluid; and the elongated slot and the air floatation platform are sealed with the experimental section by a sealing cover. On the premise of avoiding external force interference, the aircraft model has a one-dimensional degree of freedom in the horizontal direction perpendicular to the flow direction, and vortex shedding and forced vibration induced by fluid force are better restored.

Description

technical field [0001] The invention belongs to the technical fields of mechanical engineering, civil engineering and bridge engineering, and in particular relates to an air-floating support device with one-dimensional freedom and air-tightness. Background technique [0002] Aircraft is a kind of flying body that can sail in the air or water. Because of its unique performance, it can play an important role in disaster rescue, intelligence reconnaissance, geographic research, resource survey and other fields. Aircraft, as a new type of modern equipment, involves a wide range of technical fields, involving multi-disciplinary fields such as aircraft design, fluid mechanics, multiphase flow, mechanical design, control and information transmission, among which hydrodynamic shape design is an important link , It is also the support of other technologies, and researchers at home and abroad have given great attention. [0003] When the aircraft is sailing, the surface of the hull w...

AI Technical Summary

Problems solved by technology

However, for many important issues in VIV, such as how many response modes with different characteristics may exist in the system, the eddy dynamics mechanism that triggers different response modes, how jump transitions occur between modes, the maximum possible response amplitude and The dynamic behavior of structures at ultra-high Reynolds numbers, etc., have not been well resolved

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