A bionic flexible fin hydrodynamic performance measurement experimental device and method
A technology of bionic flexibility and experimental equipment, applied in the field of bionic fluid mechanics, can solve the problems of lack of simulation reliability of experimental equipment
Active Publication Date: 2021-10-01
HARBIN ENG UNIV
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Problems solved by technology
At present, in the design process of bionic robotic fish, computational fluid dynamics software is often used to simulate the propulsion of fish fins, and there is a lack of actual experimental devices to prove the reliability of the simulation
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Embodiment Construction
[0023] The present invention will be further described below in conjunction with the accompanying drawings.
[0024] The utility model relates to an experimental device for measuring the hydrodynamic performance of a bionic flexible fin, which belongs to the field of bionic fluid mechanics. It includes a tablet support, a test bench and a transparent water tank. There is a six-component force balance under the tablet support. The six-component force balance is connected to the test bench through a load-bearing aluminum rod. The six-component force balance measures the force and moment values of the test bench in various directions. There is a gear set and a stepper motor that can be precisely controlled on the bench. The first gear in the gear set is connected to the stepping motor, which is the driving wheel, and the other four gears are driven wheels, which are connected to the bionic flexible fin through a connecting rod. By controlling the stepper motor, the frequency o...
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The invention belongs to the technical field of bionic fluid mechanics, and in particular relates to an experimental device and method for measuring the hydrodynamic performance of a bionic flexible fin. The present invention can measure the thrust of the flexible fin under different Storrowha numbers and Reynolds numbers, and the hydrodynamic performance of the motion mode by adjusting the motion frequency of the bionic flexible fin, the size of the water flow in the tank, and the initial phase difference of the gear set. In the present invention, a pigment release port is provided at the middle of the chord length on both sides of the bionic flexible fin, and the pigments of two colors are stored respectively. When the bionic flexible fin moves, the pigment will diffuse into the water, realizing the visualization of the flow field around the bionic flexible fin; The wave plate can reduce the interference of the free liquid surface to the vortex system in the wake of the flexible fin and ensure the accuracy of the measurement results. The invention adopts a small stepping motor and a gear set to drive the flexible fins to move, measure with a six-component force balance, and spread pigments on the surface of the fins. The structure is simple, and it is easy to measure the hydrodynamic performance of the bionic flexible fins and visualize the surrounding flow field.
Description
technical field [0001] The invention belongs to the technical field of bionic fluid mechanics, and in particular relates to an experimental device and method for measuring the hydrodynamic performance of a bionic flexible fin. Background technique [0002] After hundreds of millions of years of natural selection, fish have evolved a propulsion and manipulation system suitable for their own cruise and escape. This system is mainly composed of the fish body and various fins on its body. They often have extraordinary abilities and can inspire some innovative designs that can greatly improve the way man-made systems operate in water. An example application that would benefit the most is autonomous underwater vehicles (AUVs). With the continuous expansion of research and use of AUVs, especially the rise of intelligent navigation and autonomous operations in the past two years, AUVs have put forward higher requirements for their navigation stability and maneuverability when perf...
Claims
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IPC IPC(8): B63B71/00
CPCB63B71/00
Inventor 苏广胜沈海龙余磊李宁宇苏玉民张磊庄佳园黄兵王博
Owner HARBIN ENG UNIV