A method for measuring the water content of complex icing clouds in a large icing wind tunnel

Abstract

The invention is suitable for the field of cloud and fog computing in icing wind tunnels, and in particular relates to a method for measuring the water content of complex icing clouds and fogs in large icing wind tunnels. The content measuring instrument includes a first heating wire unit W1 and a second heating wire unit W2; the first heating wire unit W1 is a semi-circular tubular structure, the inner surface of the semi-circular tubular structure is facing the airflow, and its span is perpendicular to the airflow direction; the second heating wire The unit W2 is a cylindrical structure, and its span is perpendicular to the airflow direction; and the formulas for calculating the liquid water content LWC and the solid water content IWC of the cloud fog are deduced. The invention establishes a multi-phase water content calculation method based on the multi-hot-line principle for the freezing clouds and fogs in large-scale icing wind tunnels, which can realize a variety of complex freezing clouds (supercooled water droplets freezing clouds, solid ice crystal freezing clouds and Refinement calculation of water content in mixed-phase icing clouds (including both liquid water droplets and solid ice crystals).

Description

technical field [0001] The invention relates to the field of cloud and fog computing in icing wind tunnels, in particular to a method for measuring the water content of complex icing clouds and fog in large-scale icing wind tunnels. Background technique [0002] When an aircraft is flying in clouds, supercooled water droplets (ie, liquid water droplets whose temperature is below freezing point) in the clouds will continuously hit the windward side of the aircraft, causing the surface to freeze. Aircraft icing widely exists in flight practice and seriously threatens flight safety. [0003] The icing wind tunnel is an important ground test equipment for aircraft icing research and aircraft component anti-icing system verification, and it plays an important role in aircraft icing airworthiness certification. The ability to simulate the icing cloud and fog environment is the core content of the performance of the icing wind tunnel. Accurate measurement and evaluation of the mi...

AI Technical Summary

Problems solved by technology

[0005] At present, the multi-hotline water content measuring instrument is a measuring instrument used to measure the water content of complex icing clouds. Although it has great potential in the field of multiphase water content measurement of complex clouds and fog, it still lacks effective and reliable fine multi-phase water content measurement instruments. Calculation method of phase water content

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