Flight icing numerical value simulation method of helicopter rotor wing

Abstract

The invention relates to a flight icing numerical value simulation method of a helicopter rotor wing. The flight icing numerical value simulation method is mainly characterized by comprising the following steps that: a vorticity compensation force algorithm is added into a momentum equation and an energy equation in a single fluid model used for vortex movement used for simulating air-super cold water drop two-phase flows under a rotating coordinate system in rotor wing trail traces, and a centrifugal force and geostrophic force algorithm is added into a super cold water drop sliding velocity equation; a water film movement and icing model of the centrifugal force and the geostrophic force is considered; and the algorithms and the models are used for carrying out the flight icing numerical value simulation flow process of the helicopter rotor wing, wherein the model of single fluid two-phase flowing used for simulating the simulating air-super cold water drop movement is realized by a partial differential equation group for describing the movement of air and air-super cold water drop binary mixtures in a rotor wing tail trace flow field, and a two-phase flow slipping speed model. The condition that the quality and energy changes are generated in water films and ice layers because of the rotary movement of the rotor wing is considered in the model of the water film movement and icing process on the rotor wing surface, and the icing shape of the rotor wing surface is obtained.

Description

technical field [0001] The invention relates to the field of aeronautical engineering, and is the application of computational fluid dynamics in the field of aeronautical engineering. Specifically, a numerical method for simulating in-flight icing of helicopter rotors. This numerical simulation technology can be implemented with a high-level computer programming language, and the computer runs the computer program to simulate the state of the helicopter rotor encountering icing during the air flight. Background technique [0002] With its good maneuverability and flexibility, helicopters are widely used in military, civil and other fields. Helicopters fly at altitudes below 6,000 meters. Within this altitude range, ultra-cold liquid water droplets in the atmosphere (the temperature is below freezing and exists in the form of liquid water droplets) will collide with the components on the surface of the aircraft to form water films, such as wings. A large amount of accumulat...

AI Technical Summary

Problems solved by technology

[0011] First of all, due to the characteristics of the rotary motion of the helicopter rotor, the calculation space adopted by the numerical calculation needs to establish a rotating coordinate system according to the angular velocity of the rotor, which will change the original form of the governing equation of the fluid motion

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