Small system for measuring resistance reducing performance of drainage surface

Abstract

The invention discloses a small system for measuring the resistance reducing performance of a drainage surface, comprising a resistance reducing experimental platform, an image collector, a computer and a resistance reducing evaluating model stored in the computer, wherein the image collector is used for completely monitoring the movement process of a sample and recording video information; and the computer and the resistance reducing evaluating model are used for processing the information collected by the image collector by Adobe premiere software to obtain digital information FD=[S, T] output and analyzing the digital information FD by displacement-time relationship dV=dS / dT to obtain instantaneous speed dV.

Description

A Miniaturized System for Measuring the Drag Reduction Performance of Hydrophobic Surfaces technical field The invention relates to a device for measuring drag reduction performance, more particularly, a miniaturized system for measuring drag reduction performance of hydrophobic surfaces used in a laboratory environment. Background technique After tens of millions of years of evolution, organisms in nature include not only the temporary regulation of the body to the external medium, but also the fairly stable adaptation to the external system formed through long-term evolutionary optimization, and then formed an extraordinary environment suitable for its survival. smooth surface. For example, the regular microwave patterns on the surface of soil animals such as pangolins, mole crickets, and dung beetles allow them to freely enter and exit in sticky and wet soils; plants such as lotus leaves have non-smooth protrusions covered with a special waxy layer, making them self-cle...

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Problems solved by technology

However, the above-mentioned evaluation method for the drag reduction performance of the drag reduction surface is relatively complicated, and is usually used on the surface of a large object, and is not suitable for measuring the drag reduction performance of the surface of a small object.

For example, to evaluate the performance of surface drag reduction by measuring the pressure distribution and flow velocity in the flow field in a wind tunnel or water tunnel, it is necessary to use the boundary layer momentum integral formula to analyze the drag reduction effect of the surface, and the construction and operation costs of this method Relatively high

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