A device for testing the vibration drag reduction performance of underwater near-wall fluid

A testing device and fluid technology, which is applied in the direction of fluid dynamics test, measurement device, machine/structural component testing, etc., can solve the problem of inability to meet zero pressure gradient and variable pressure gradient test conditions, poor versatility, and difficulty in drag reduction test devices. Sealing and other issues to achieve the effect of ensuring the wall surface, reducing additional influence, and good versatility

Active Publication Date: 2020-09-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an underwater near-wall fluid vibration drag reduction performance test device to solve the problem that the existing drag reduction test device is difficult to seal, has poor versatility, and cannot meet the two test conditions of zero pressure gradient and variable pressure gradient

Method used

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  • A device for testing the vibration drag reduction performance of underwater near-wall fluid
  • A device for testing the vibration drag reduction performance of underwater near-wall fluid
  • A device for testing the vibration drag reduction performance of underwater near-wall fluid

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Embodiment 1: see Figure 1 to Figure 10 , an underwater near-wall fluid vibration drag reduction performance test device described in this embodiment, the test device is used for zero pressure gradient test test conditions, including a flat plate 1, a fixed block 2, a drag reducer cavity 3, a force measuring Rod 5, adjustment block 6, pressure block 7, pneumatic quick connector 8, dowel rod 9, adapter seat 10, first sealing gasket 11, second sealing gasket 12, support shaft 13, the front of the plate 1 is set There is a U-shaped groove 1-1, the fixed block 2, the drag reducer cavity 3, and the adjusting block 6 are placed in the U-shaped groove 1-1 along the flow direction, and the right end of the plate 1 is provided with The positioning groove 1-2, the pressing block 7 is fixed in the positioning groove 1-2 by screws, and the fixing block 2, the drag reducer cavity 3, and the adjusting block 6 are pressed in the flow direction Tight, the bottom of the U-shaped groov...

Embodiment 2

[0060] Example 2: see Figure 2 to Figure 4 , Figure 6 , Figure 7 , Figure 9 to Figure 13 , an underwater near-wall fluid vibration drag reduction performance test device described in this embodiment, the test device is used for the test conditions of the variable pressure gradient test, including a flat plate 1, a fixed block 2, a drag reducer cavity 3, and an adjustment block 6. Briquetting block 7, pneumatic quick connector 8, adapter seat 10, first sealing gasket 11, second sealing gasket 12, supporting shaft 13, supporting force measuring rod 18, and a U-shaped groove is opened on the front of the plate 1 1-1, the fixed block 2, the drag reducer cavity 3, and the adjustment block 6 are placed in the U-shaped groove 1-1 along the flow direction, and the right end of the plate 1 is provided with a positioning groove 1- 2. The pressing block 7 is fixed in the positioning groove 1-2 by screws, and the fixing block 2, the drag reducer cavity 3, and the adjusting block 6 ...

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Abstract

The invention relates to an underwater near-wall surface fluid vibration resistance reduction performance testing device, belongs to the technical field of near-wall surface fluid boundary layer resistance reduction performance testing and solves the problems that the conventional testing device is difficult to seal, has poor universality and cannot meet two testing conditions of zero pressure gradient and variable pressure gradient. The technical points are as follows: a pressing block is fixed in a positioning groove of a flat plate, and a fixing block, a resistance reducer cavity and an adjusting block are tightly pressed in a U-shaped groove in a sealing manner; the back of the flat plate is hermetically provided with an adapter, a resistance reducer is arranged in the groove of the resistance reducer cavity, a copper membrane is arranged on a bonding wall surface, and the copper membrane and the resistance reducer cavity are hermetically arranged; when the testing device is used for testing conditions of a zero-pressure gradient test, the adapter is in rolling connection with a supporting shaft through a force measuring rod and a dowel bar, and the force measuring rod swings around the shaft; and when the testing device is used for testing conditions of a variable pressure gradient test, the adapter is in rolling connection with the support shaft through a support force measuring rod, and the support force measuring rod swings around the shaft. The underwater near-wall surface fluid vibration resistance reduction performance testing device is used for testing the vibration resistance reduction performance of the underwater near-wall surface fluid.

Description

technical field [0001] The invention relates to a device for testing the vibration drag reduction performance of a fluid near a wall, in particular to an underwater device for testing the vibration drag reduction performance of a fluid near a wall, and belongs to the technical field of testing the drag reduction performance of a fluid boundary layer near a wall. Background technique [0002] When ships and underwater vehicles are sailing, the boundary layer near the wall is prone to frictional resistance, resulting in huge energy consumption. Energy depletion and continuous high oil prices urgently require research on new energy-saving technologies. Active control of near-wall turbulence can reduce frictional resistance has been recognized by the industry. The circuit layout of the drag reducer is complicated, and the existing drag reduction test device is mainly used in the air flow, such as the literature "Zhang Hao. Experimental research on the active control of the flat ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M10/00
CPCG01M10/00
Inventor 单小彪张露谢涛
Owner HARBIN INST OF TECH
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