Variable-water-depth towing tank air-layer resistance reduction test device and method

A technology of towing pools and test devices, which is applied in the direction of measuring devices, fluid dynamics tests, and machine/structural component tests, and can solve problems such as the inability to meet the requirements of the research on the drag reduction mechanism of the air layer

Inactive Publication Date: 2016-05-11
NAVAL UNIV OF ENG PLA
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Problems solved by technology

At present, for this technical field, the conventional test system cannot meet t

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  • Variable-water-depth towing tank air-layer resistance reduction test device and method
  • Variable-water-depth towing tank air-layer resistance reduction test device and method

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] An air layer drag reduction test device for a variable water depth towed pool ( figure 1 ), including the operating frame 2 installed on the trailer, the operating frame 2 is provided with a navigation frame 5, the operating frame 2 includes two parallel crossbars 3 for connecting the trailer, and there is a grid between the two crossbars 3 The two ends of the grid 4 and the navigation frame 5 are respectively connected to the inner edges of the two grids 4, and the two ends of the navigation frame 5 are slidingly connected to the inner edges of the two grids 4, and can move along the length direction of the grid 4.

[0025] One end of at least two telescopic support rods 6 is connected to the navigation frame 5, and the other end of each telescopic support rod 6 is located under the water surface of the experimental pool 1, and is respectively c...

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Abstract

The invention discloses a variable-water-depth towing tank air-layer resistance reduction test device and method. A model to be tested is placed under the water in an experiment tank, and total resistance and local friction force of the model to be tested and advancing in the water are measured; the total resistance and local friction force of the model to be tested and advancing in the water under such state can be measured through an air supplier and an air injection device; the total resistance and local friction force of the model to be tested and advancing in the water after an air layer is diffused can stilled be measured after closing the air supplier and the air injection device; and in the process, an underwater camera system continuously records the influence of an underwater flow field. The test device and method are suitable for underwater navigation body and water surface ship model air injection resistance reduction resistance sea-keeping test; and the test technique can provide test foundation for the air-layer resistance reduction mechanism research and also can provide technical support for engineering application of a bubble boat.

Description

technical field [0001] The invention relates to the technical field of designing ship hydrodynamic tests, in particular to an air layer drag reduction test device and method for a variable water depth towing pool. Background technique [0002] The existing air layer drag reduction test methods are divided into the air layer observation method in the circulating water pool and the air layer drag reduction measurement method in the dragged water pool. None of them can observe the shape of the air layer while measuring the total resistance and local friction force of jet drag reduction. And changes in water depth will also affect the air layer at the bottom of the model. A complete test system is required for the research on the drag reduction mechanism of the air layer in the variable water depth towed pool to realize the simultaneous progress of variable water depth, observation of the air layer at the bottom of the pool, and resistance measurement. At present, for this tec...

Claims

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Application Information

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IPC IPC(8): G01M10/00
CPCG01M10/00
Inventor 吴浩董文才欧勇鹏叶青孙小帅
Owner NAVAL UNIV OF ENG PLA
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