Method for predicting characteristics of dynamic icing ice type microstructure of aircraft
A prediction method and microstructure technology, applied in the testing of machine/structural components, measuring devices, aerodynamic tests, etc., can solve the problem of difficult to predict the detailed characteristics of dynamic icing and icing patterns, and the inability to establish icing conditions and physical characteristics of icing Quantitative relationship, restricting aircraft icing characteristics, flight safety hazards and other issues to improve the refined prediction level, to achieve the effect of improving the refined level
Active Publication Date: 2018-02-16
CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT
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Problems solved by technology
[0002] Existing aircraft icing and icing pattern prediction methods mainly simulate the macroscopic morphology of aircraft icing through numerical calculation or experimental methods, and it is difficult to predict the detailed characteristics of dynamic icing and icing patterns under different icing conditions, and it is also impossible to establish the relationship between icing conditions and icing physical characteristics. The quantitative relationship between them greatly restricts people's improvement of the refined prediction level of aircraft icing characteristics
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[0013] The present invention adopts the method combining wind tunnel experiment, microscopic image experiment and phase field simulation, establishes a kind of method that can effectively predict the microstructural characteristic of aircraft dynamic icing icing, such as figure 1 shown, including the following steps:
[0014] 1. In the icing wind tunnel, the incoming flow velocity, water drop diameter and liquid water content are fixed, and the incoming flow temperature is changed to carry out icing wind tunnel experiments to obtain the icing macroscopic morphology of the model surface under different temperature conditions.
[0015] 2. In view of the lack of data on the nucleation rate of aircraft dynamic icing process at home and abroad, on the basis of icing wind tunnel experiments, carry out ice microscopic image experiments to obtain the microscopic morphology and nucleation rate of icing:
[0016] Select the ice phase in the middle part of the experimental model, slice a...
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The invention discloses a method for predicting characteristics of a dynamic icing ice type microstructure of an aircraft. The method comprises a first step of acquiring an icing macro morphology by an icing wind tunnel experiment; a second step of acquiring an icing micro morphology and the nucleation density through an ice type microscopic image experiment; and a third step of acquiring characteristics of an icing ice type microstructure through the phase field simulation. Compared with the prior art, the invention has the positive effects that with the invention, the method for predicting the characteristics of the icing microstructure can be established, the shortcoming that the current prediction of the icing characteristics is mainly macro prediction is effectively overcome, and therefore technical support is further provided for establishing a method for quantitative characterization of icing physical characteristics, increasing the refinement level of icing prediction, developing a high efficiency, low redundancy aircraft anti-icing/deicing system, and improving the safety flight capability of the aircraft under icing conditions.
Description
technical field [0001] The invention relates to a method for predicting dynamic icing and icing microstructure characteristics of an aircraft. Background technique [0002] Existing aircraft icing and icing pattern prediction methods mainly simulate the macroscopic morphology of aircraft icing through numerical calculation or experimental methods, and it is difficult to predict the detailed characteristics of dynamic icing and icing patterns under different icing conditions, and it is also impossible to establish the relationship between icing conditions and icing physical characteristics. The quantitative relationship between them greatly restricts people's improvement of the refined prediction level of aircraft icing characteristics and its hazards to flight safety. [0003] Aiming at the fact that the current characteristics of aircraft icing and icing types cannot be quantified and characterized, which seriously restricts the current situation of refined prediction of ai...
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CPCG01M9/06
Inventor 杜雁霞刘磊肖光明李伟斌魏东杨肖峰桂业伟
Owner CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT
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