A ground experimental system and experimental method for preparing porous ice layer by 3D printing

Abstract

The invention discloses a ground experiment system for preparing porous ice layers by 3D printing, which includes a cold environment box, a peristaltic pump, a three-axis guide rail, a computer host, a piezoelectric sprayer, and a control unit; the piezoelectric sprayer can be used according to actual conditions It needs to be replaced, and the spray flow rate and the average particle size of the droplets can be precisely adjusted through the size and quantity of the piezoelectric sprayer micropores, the drilling range, and the vibration frequency; the control unit controls the temperature of the cold environment box, the movement of the slide rail, the flow rate of the peristaltic pump, and the piezoelectric sprayer frequency. The present invention can 3D print an ice layer with stable physical properties on a flat or irregularly curved surface for ground anti-icing experiments. The invention has the advantages of simple operation, simple structure, convenient installation, low energy consumption, convenient maintenance and obvious effect, and can effectively improve the quality of the ground cold environment anti-icing experiment.

Description

technical field [0001] The invention relates to the field of aircraft anti-icing, in particular to a ground experiment system for preparing porous ice layers by 3D printing. Background technique [0002] Aircraft icing has always been one of the main threats to aviation safety. In order to study aircraft anti-icing, a ground cold environment test bench was established. The ground anti-icing experiment has high requirements on the physical properties of the ice layer. Ice layers with different porosities and pore sizes are prepared mainly by controlling the wind speed, freezing temperature, liquid water content (LWC), and average particle size (MVD) in the air duct. The physical properties of the ice layer directly affect the adhesion between the ice layer and the wall, the strength of the ice layer, and then affect the efficiency of the anti-icing system. [0003] At present, icing wind tunnels or ground cold environment chambers are mainly used at home and abroad to prepar...

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Problems solved by technology

[0003] At present, icing wind tunnels or ground cold environment chambers are mainly used at home and abroad to prepare ice layers that meet the requirements. Although icing wind tunnel experiments can prepare ice layers that meet the requirements, due to the long experimental period and high cost, it is difficult to use them on a large scale. Aircraft anti-icing experiments; the ground cold environment box uses a gas-liquid mixing nozzle to prepare ice layers by controlling the gas-liquid pressure and mixing ratio. The ice layer prepared by this method has poor uniformity and has the disadvantage that the physical properties of the ice layer are difficult to control

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