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Steady-state anti-icing simulation method based on continuous water film flow

A simulation method and anti-icing technology, applied in design optimization/simulation, instruments, calculations, etc., can solve problems such as flight safety impact, aircraft crash and death, and achieve the effect of avoiding complexity

Active Publication Date: 2022-04-26
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

All these unfavorable factors will have an impact on flight safety, and in serious cases may cause tragic accidents involving aircraft crashes and fatalities.

Method used

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  • Steady-state anti-icing simulation method based on continuous water film flow
  • Steady-state anti-icing simulation method based on continuous water film flow
  • Steady-state anti-icing simulation method based on continuous water film flow

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Experimental program
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Effect test

Embodiment

[0051] The present invention takes the NACA0012 airfoil as the research object, and simulates the flow process of the water film and the distribution of the surface temperature through the mass conservation and energy conservation relationship of the water film on its surface. The specific implementation steps are as follows:

[0052] S1: Establish the computational domain for component anti-icing two-phase flow calculation according to the geometric parameters of the component;

[0053] S2: Use commercial software to mesh the two-phase flow calculation domain;

[0054] S3: Calculate the two-phase flow field by solving the Euler / Euler model of the commercial software CFX, and discretely solve the control equations of air and water droplets based on the same set of grids. The expression of the control equations is:

[0055]

[0056] alpha a +α w = 1

[0057]

[0058]

[0059]

[0060]

[0061] m a =-M w

[0062]

[0063]

[0064] Wherein subscript γ r...

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Abstract

The invention discloses a steady-state anti-icing simulation method based on continuous water film flow. The steady-state anti-icing simulation method comprises the following steps: establishing a two-phase flow computational domain model; carrying out grid division on the computational domain; solving the two-phase flow control equation to obtain a two-phase flow field result; calculating a water collection coefficient of the anti-icing surface; solving the mass conservation equation of the anti-icing surface control body to obtain the numerical values of each mass item and energy item and the anti-icing surface temperature; using a relaxation iteration method, taking the anti-icing temperature as an iteration variable to solve an energy equation, correcting the mass item and the energy item in the previous step, and finally obtaining the anti-icing surface temperature meeting the convergence condition. And technical support can be provided for related engineering technicians.

Description

technical field [0001] The invention relates to the technical field of steady-state anti-icing, in particular to a steady-state anti-icing simulation method based on continuous water film flow. Background technique [0002] Aircraft icing will bring great harm to flight safety, and it has always been a huge challenge for the aviation industry. The icing of the aircraft will not only increase the weight of the aircraft, but also destroy the aerodynamic shape of the aircraft, which will reduce the lift force and increase the resistance, and reduce the maneuverability and stability of the aircraft; There is a good chance that the chunk will hit other parts of the aircraft as well. All these unfavorable factors will have an impact on flight safety, and in serious cases may cause tragic accidents of aircraft crashes and fatalities. [0003] In order to alleviate the adverse effects of icing on aircraft performance and ensure flight safety, modern aircraft are equipped with anti...

Claims

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Application Information

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IPC IPC(8): G06F30/28G06F113/08G06F119/14
CPCG06F30/28G06F2113/08G06F2119/14Y02T90/00
Inventor 刘蕾王彪陈天祥虞冬寅
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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