Method of Forming Flow Field in Open Type Adjustable Pressure Submerged Jet Water Tunnel

Abstract

An open pressure-adjustable submerged jetting water tunnel comprises a working water tank. The working water tank comprises a top pressure adjustment cavity. In the working water tank, the space below the pressure adjustment cavity is divided into a test area and a pressure adjustment section. The lower part of the pressure adjustment cavity is communicated with the test area and the pressure adjustment section. The sidewall of the test area is connected with an upstream water source through a flow channel. The flow channel directly faces a test object installed in the test area, and the flow channel is equipped with a velocity adjustment valve. The pressure adjustment section is beyond the working water tank downward, and extends downward to form a pressure adjustment vertical shaft which is communicated with a downstream water pool. The test area and the pressure adjustment vertical shaft are each provided with a lifting overflow dam. The pressure adjustment cavity is provided with a pressure adjustment system. The invention further discloses a method for the open water tunnel to form a pressure-adjustable and velocity-adjustable flow field, including the steps of setting a submerged jetting test area, driving the water flow by gravity, adjusting the pressure through the pressure adjustment system, adjusting the velocity through the velocity adjustment valve, and draining water through the pressure adjustment vertical shaft. The wall effect is eliminated. A stable and quality flow field can be formed through pressure and velocity adjustment.

Description

technical field [0001] The invention relates to the technical field of hydrodynamic tests, in particular to an open-type adjustable pressure submerged jet-type water tunnel applied to cavitation and supercavitation tests. Background technique [0002] Hydrodynamic test is to use various experimental equipment and instruments to measure various physical parameters that characterize the flow of water or other liquids and their interaction with solid boundaries, and analyze and process data to study the relationship between various parameters. relation. The water tunnel is a hydrodynamic test equipment used for the fluid characteristics of the test section without a free surface. It can conduct conventional hydrodynamic tests, cavitation tests, boundary layer mechanism and water noise tests. The existing closed-circulation water For tunnels and gravity water tunnels, the working section generally adopts a circular or square flow channel. There are solid walls in the working se...

AI Technical Summary

Problems solved by technology

The water tunnel is a hydrodynamic test equipment used for the fluid characteristics of the test section without a free surface. It can conduct conventional hydrodynamic tests, cavitation tests, boundary layer mechanism and water noise tests. The existing closed-circulation water For tunnels and gravity water tunnels, the working section generally adopts a circular or square flow channel. There are solid walls in the working section of the water tunnel. When simulating the flow field of an infinite basin, there will be a tube wall effect (wall effect), especially in the study of superspace When the bubble flows, the cavitation will not be simulated, so the quality of the flow field cannot be guaranteed

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