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Testing device and method for evaluating drag-reduction effect of bionic jet surface

A test device and jet technology, applied in the direction of fluid dynamics test, measuring device, machine/structural component test, etc., can solve the problems such as poor control of flow rate, and achieve the effect of simple structure, stable flow rate and accurate test

Inactive Publication Date: 2014-03-12
HARBIN ENG UNIV
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  • Abstract
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Problems solved by technology

[0003] At present, the drag reduction test devices for non-smooth surfaces and jet surfaces are mostly focused on the rotating jet test method. For example, the patent application number is: 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 The application number is: 201120070969.8, the name is "a test device for frictional resistance test", which provides power for the main field velocity through the rotation of the cylinder, and the flow rate is not easy to control

Method used

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  • Testing device and method for evaluating drag-reduction effect of bionic jet surface

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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 , the present invention consists of a stepper motor 11, a servo hybrid stepper motor driver 12, an elastic diaphragm coupling 10, a propeller 8, a test cylinder model 9, a torque signal coupler 6, a pump 2, a water tank 1, and a flow meter 5 , relief valve 3 and necessary pipeline connections. The servo hybrid stepper motor driver 12 is connected to the stepper motor 11, and the stepper motor 11 is connected to the input shaft of the propeller 8 with the elastic diaphragm coupling 12 to provide power for the propeller 8; the right end of the test cylinder model 9 is connected to the bracket Fixed together, the left end is connected with the torque signal coupler 6 through the elastic diaphragm coupling 7; the propeller 8 is installed inside the test cylinder model 9, and a bearing is arranged between the propeller shaft and the test cylind...

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Abstract

The invention aims to provide a testing device and a testing device method for evaluating a drag-reduction effect of a bionic jet surface. The testing device comprises a stepping motor, a propeller, a torque signal coupler, a pump and a water tank, wherein the water tank is filled with water, the pump is communicated with the water tank and is communicated with a testing cylinder model through a first pipeline, the water tank is communicated with the testing cylinder model through a second pipeline, and a ball valve is mounted on the first pipeline; the right end of the testing cylinder model is fixed on a bracket, the propeller is arranged in the testing cylinder model, the stepping motor is located at the outer part of the right side of the testing cylinder model and is connected by the propeller by a shaft, and the left end part of the testing cylinder model is connected with the torque signal coupler. According to the testing device, the propeller is utilized for providing power to the speed of a main flow field, so that the flow speed is stable. The testing method is simple and intuitional and provides a reliable result.

Description

technical field [0001] The invention relates to a test device and a test method for testing the frictional resistance of a fluid to a surface structure. 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 and jet surfaces are mostly focused on the rotating jet test method. For example, the patent application number is: 201110089369.0, the name is "test device for e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M10/00
Inventor 赵刚李芳刘维新张殊赵健英刘明明孙壮志李照远
Owner HARBIN ENG UNIV
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