Method and system for measuring water drop collecting coefficient of aerodynamic surface

Abstract

The invention provides a method and system for measuring a water drop collecting coefficient of an aerodynamic surface. The method comprises the steps that the aerodynamic surface is heated to the preset outer surface temperature with the first power density under the dry air with the specific speed and the specific temperature; the aerodynamic surface is heated to the preset outer surface temperature with the second power density under the wet air with the specific speed and the specific temperature, wherein the wet air comprises the specific liquid water content; the water drop collecting coefficient of the aerodynamic surface is obtained based on the specific speed, the specific temperature, the liquid water content, the first power density, the second power density and the preset outer surface temperature. According to the method and system, the water drop collecting coefficient on the aerodynamic surface under any state can be continuously measured, and the method and system are especially used for measuring the water drop collecting coefficient of the aerodynamic surface such as wings and engine air inlets of an airplane.

Description

Technical field [0001] The invention relates to a method and system for measuring the water droplet collection coefficient of an aerodynamic surface. Background technique [0002] When performing anti-icing or icing simulation analysis, it is necessary to solve for the heat flow of water evaporation and heat dissipation, the heat flow required to heat the supercooled water droplet, and the heat flow of the kinetic energy transformation of the water droplet. Collection factor. Among them, the impact water volume is the water droplet collection coefficient β, the air velocity V 0 And the liquid water content in the air as a function of LWC. In order to verify the accuracy of the water drop collection coefficient calculated by the calculation software or program, it is necessary to measure the water drop collection coefficient through experiments. [0003] The known method of water droplet collection coefficient is blotting paper dyeing method. Place the blotting paper on the measu...

AI Technical Summary

Problems solved by technology

[0004] The dyeing method of blotting paper is simple to operate, but it is limited by the water absorption capacity of blotting paper. For humid air with a large liquid water content, the blotting paper is oversaturated in a short time, so that it cannot be measured accurately

And in each state, the blotter needs to be replaced, so continuous measurement of different states is not possible

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