Underwater drag reduction surface performance test device

Abstract

The present invention discloses an underwater drag reduction surface performance test device. The device comprises a mixed-flow pump and an experimental section; the mixed-flow pump is connected with a first bend through a short straight tube, the first bend is connected with a first corner through a first round heaven and square earth section, the first corner is connected with a contraction section through a damping screen, the contraction section is connected with the experimental section, the experimental section is connected with a second round heaven and square earth section through an expansion section, the second round heaven and square earth section is connected with the mixed-flow pump through a second bend, a third bend and a long straight tube, and the mixed-flow pump is employed to realize water flow circular flow. The underwater drag reduction surface performance test device employs the differential pressure method for speed measurement and externally arranges a sensor so as to reduce the cost while reducing the flow field disturbance; the sensor support frame is fixed with the experimental section through a sucker, and is easy to separate from the experimental section, a sample rack employs a two-section mode to satisfy replacing of samples with different types of connection modes; and the upper surface of the sensor support frame is provided with an annular groove and a scale, the structure is simple, and the included angle of the samples and the water flow direction in the experimental section is easy to regulate.

Description

technical field [0001] The invention relates to an underwater drag reduction surface performance test device, which belongs to the technical fields of ship and underwater vehicle engineering and water conservancy and hydropower engineering. Background technique [0002] At present, scholars at home and abroad have carried out extensive theoretical and applied research on the problem of fluid and solid interface motion drag reduction, and have made progress in many aspects. Because the problem of drag reduction directly affects the energy consumption and performance of equipment, the research on this problem has always been paid great attention by various countries. Bionic drag reduction is a new research hotspot in recent years. Most of the research methods are to test the drag reduction performance of the sample through the test device in advance, and then put it into practical engineering application. It can be seen that with the development of drag reduction technology, ...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing devices and methods for testing the drag-reducing surface performance of water tunnels under water use the sensor and its measurement sample to be placed in the test section together. interference; on the other hand, the sensor has higher requirements on waterproof performance, which will inevitably lead to higher cost

The external sensor and its support frame need to be rigidly fixed by drilling or welding on the test section, which affects the strength of the test section and is not conducive to the disassembly of the sample

The angle adjustment of the sample in the test section requires an additional angle adjustment mechanism, which is complex in design and difficult to operate

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