A fluctuating wall resistance test device based on fish swimming posture
A test device and wall technology, which is applied in the field of wave wall resistance test devices, can solve the problems of large cost and long cycle.
Active Publication Date: 2022-04-15
CHINA JILIANG UNIV
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Problems solved by technology
Due to the long period of numerical simulation and fluid experiment and other characteristics, many researches are only at the theoretical level, and many of the existing hydrodynamic drag reduction technologies have not yet entered the engineering field.
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[0026] Such as figure 1 As shown, the device includes a fluctuating wall component, an integral waterway component and a resistance measurement component. The undulating wall surface component and the resistance measurement component are both installed in the test section 4 of the integral waterway component. The test section 4 can be used to place the test model, which is the flow field space for the experiment.
[0027] The overall waterway component is mainly composed of a pipeline component, a water pump 8, a water pump motor 9 and corresponding pipeline support components. The pipeline assembly includes a first corner 1 , a first stable section 2 , a contraction section 3 , a test section 4 , a diffuser section 5 , a second stable section 6 , a second corner 7 , and a third stable section 10 . All pipelines are connected to form a closed circulating water circuit. Water pump 8 and motor 9 select the model of integrated structure for use, simplify the intermediate struc...
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The invention relates to a fluctuating wall surface resistance testing device based on fish swimming posture. The invention includes a fluctuating wall surface component, an integral waterway component, and a resistance measuring component. The undulating wall assembly is located at the center of the test section of the integral waterway assembly, powered by a drive motor, and converted into a sinusoidal undulating wall through the coupling and the undulating wall assembly. The overall waterway component is connected by pipelines to form a closed circulating waterway, and the power of water circulation is provided by the water pump and the water pump motor. The resistance measurement component is mainly composed of a pressure induction pipe and a pressure sensor arranged in the test section, and the resistance is obtained by measuring the pressure difference change of the water flow before and after the undulating wall component. The invention converts the rotational motion of the eccentric disc cam into the bending deformation of the surface, and realizes the quantitative control of the bending deformation deflection of the wall surface. And it can be coupled with various non-smooth surfaces to conduct resistance measurement experiments, and quantitatively test the drag reduction rate of the deformed wall surface caused by parameters of different fluctuation amplitudes and periods.
Description
technical field [0001] The invention relates to the field of fluid resistance testing, in particular to a fluctuating wall surface resistance testing device based on fish swimming posture. Background technique [0002] Marine creatures such as sharks and rays have gone through tens of millions of years of baptism and a long period of natural selection, and gradually mastered various unique ways of survival to adapt to the environment. Scholars have found that the fish's extraordinary movement ability is essentially a flow control problem, that is, fish can achieve wave-like swings through body deformation, effectively controlling the changes in the spatio-temporal structure of its external flow field, and its swimming resistance is very small. With the deepening of international studies on drag reduction theory using bionics principles and the increase of manpower and funds invested in the design of drag reduction devices, drag reduction technology has made great progress in...
Claims
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IPC IPC(8): G01M10/00
CPCG01M10/00
Inventor 谷云庆牟介刚吴登昊周佩剑徐茂森余松伟于凌志包福兵
Owner CHINA JILIANG UNIV