Experimental device and method for evaluating the drag reduction effect of bionic non-smooth surfaces

A non-smooth surface, smooth surface technology, applied in the direction of measuring device, fluid dynamics test, machine/structural component test, etc. Simple structure and easy operation

Inactive Publication Date: 2016-06-29
HARBIN ENG UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] At present, the drag reduction test devices for non-smooth surfaces are mostly focused on the rotation test method, such as the patent number: 201110089369.0, the name is "test device for evaluating the drag reduction effect of bionic non-smooth surface and bionic jet surface" and the patent number is: 201120070969.8, The name is "a test device for testing frictional resistance", which converts the mainstream speed into rotational motion, the test results are not intuitive enough, and it is difficult to process non-smooth surfaces such as pits, convex hulls, and grooves on the surface of the cylinder

Method used

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  • Experimental device and method for evaluating the drag reduction effect of bionic non-smooth surfaces

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Embodiment Construction

[0016] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0017] combine figure 1 , comprising a stepper motor 5, a stepper motor driver 6, an elastic diaphragm coupling 7, a test plate model 3, a screw nut mechanism and a pool; wherein the nut 4 is fixedly connected with the test plate model 3, along the lead screw 2 Do translational movement.

[0018] The working principle of the present invention is:

[0019] The stepper motor 5 drives the lead screw 2 to rotate, and the test flat model 3 fixedly connected with the nut 4 moves together. At the same time, the driving power of the stepping motor 5 and the speed of the test flat model 3 are recorded. By comparing the same driving power The speed of the non-smooth surface model and the smooth surface model is used to evaluate the drag reduction effect of the bionic non-smooth surface, and it is also used to evaluate the bionic non-smooth surface by comparing the driving...

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Abstract

The invention aims at providing a testing device and method for assessing a drag reduction effect of a bionic non-smooth surface. The testing device includes a water tank, a stepping motor and a slab model. The water tank is filled with a liquid. The slab model is immersed below the liquid level of the liquid. The stepping motor is connected with a leading screw through an elastic sheet coupler. A nut is installed on the leading screw. The nut is connected with the slab model. The stepping motor drives the leading screw to rotate under the driving of a driver of the stepping motor so that the nut drives the slab model to move in the liquid. The testing device and method for assessing the drag reduction effect of the bionic non-smooth surface adopts the leading screw nut mechanism to drive the testing slab model to perform translation motion and the test principle is simple and directly observable, mainstream speed is easy to control, machining of the non-smooth surface model is convenient and testing result is reliable.

Description

technical field [0001] The invention relates to a test device and method, in particular to a test device and method for measuring frictional resistance. Background technique [0002] The main energy consumption of transportation tools when traveling in water is used to overcome the traveling resistance. Therefore, analyzing and reducing resistance is of great significance for saving energy, improving working conditions and improving work efficiency. The travel resistance of the transportation tool is mainly composed of friction resistance and pressure difference resistance, among which friction resistance accounts for the vast majority of the total resistance, so the key to resistance analysis is to analyze and measure friction resistance. [0003] At present, the drag reduction test devices for non-smooth surfaces are mostly focused on the rotation test method, such as the patent number: 201110089369.0, the name is "test device for evaluating the drag reduction effect of bi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M10/00
Inventor 赵刚李芳刘维新孙壮志毕红时王晶晶刘文博赵华兴
Owner HARBIN ENG UNIV
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