SLD icing detection method based on ice shape growth and icing detector

A technology of icing detectors and detection methods, which is applied in the field of icing detectors, can solve problems such as increased manufacturing costs, extremely high processing requirements, and icing, and achieves the effects of simple detection principles, simple structures, and simplified structures

Pending Publication Date: 2021-03-16
WUHAN AVIATION INSTR
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AI Technical Summary

Problems solved by technology

[0004] Although the above-mentioned icing detector can realize the detection of supercooled large water droplets, it has the following disadvantages: the detection principle of this detector is: large water droplets are collected in the first section of the probe, flow to the surface of the second section to decelerate and Release latent heat, flow to the outer surface of the third section and freeze, and then detect large water droplets; in this detection principle, use the shape of the outer surface of the second section to decelerate large water droplets and release latent heat, due to the deceleration of large water droplets and the release of latent heat It is difficult to control, so the requirements for the outer surface shape of the second section are very high. Specifically, the requirements for the streamline and surface roughness processing of the outer surface shape of the second section are extremely high, which will greatly increase the Difficulty in processing large probes, increasing manufacturing costs

Method used

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  • SLD icing detection method based on ice shape growth and icing detector

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Effect test

Embodiment 1

[0027] Example 1. A kind of SLD icing detection method based on ice shape growth, carry out according to the following steps:

[0028] S1. The simulated icing time required for icing to a preset thickness on the largest ring wall 2 on the windward side of the spherical probe 1 is obtained through simulation;

[0029] S2. Collect the actual thickness of the ice within the simulated icing time on the largest ring wall 2 on the windward side of the spherical probe 1 in flight;

[0030] S3. Comparing calculation processing: comparing the preset thickness and the actual thickness described in the calculation, and outputting the calculation result.

[0031] According to the continuous simulation data, the optimal preset thickness is 0.5mm, and the simulated icing time at this time is about 30-60s; through the setting of this parameter, the detection time can be made more moderate and avoid excessive detection time. If the detection time is too long, it will affect the detection ef...

Embodiment 2

[0049] Example 2. A kind of icing detector used in SLD icing detection method, constitutes as figure 1 As shown, it includes spherical probe 1, temperature acquisition module 4, liquid water content identification module 5, wind speed detection module 6, ice thickness detection module I3, ice thickness detection module II9, timing module 8, data processing module 7, and alarm module . The ice thickness detection module I3 is used to collect the actual thickness of ice on the largest ring wall 2 on the windward side of the spherical probe 1 in flight; the ice thickness detection module II9 is ​​used to collect the center 11 of the windward side of the spherical probe 1 Icing signal; temperature acquisition module 4, used to collect atmospheric static temperature in the flight environment; described liquid water content identification module 5, used to collect liquid water content in the flight environment; wind speed detection module 6, used to collect flight environment The ...

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Abstract

The invention discloses an SLD icing detection method based on ice shape growth and an icing detector. The method is carried out according to the following steps: S1 carrying out simulation to obtainsimulation icing time required for icing the maximum annular wall (2) of the windward side of a spherical probe (1) to a preset thickness; S2 collecting the actual icing thickness on the maximum annular wall (2) of the windward side of the spherical probe (1) in flight within the simulated icing time; and S3 comparison operation processing: comparing and operating the preset thickness and the actual thickness, and outputting an operation result. The icing detector has the advantages of being simple in structure, convenient to machine, low in cost and high in detection precision.

Description

technical field [0001] The invention belongs to the technical field of aircraft icing detection, and relates to an SLD icing detection method based on ice shape growth and an icing detector. Background technique [0002] In the field of aircraft icing detection, icing detection is performed by installing an icing detector on the side of the nose of the aircraft. In icing detection, water droplets with an average droplet diameter (Median Volumetric Diameter, MVD) less than 50 μm are usually called normal water droplets, and water droplets greater than or equal to 50 μm are called large water droplets. The Supercooled Large Droplet (SLD) in the large water droplet has a larger mass than the normal water droplet, so it is easy to flow and freeze on the surface of the aircraft, which increases the probability of icing on the non-protected parts of the aircraft, thereby increasing the flight risk. [0003] The publication number is CN102336272A, which discloses an icing detector...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64D15/20
CPCB64D15/20
Inventor 李昂郭玉东文科何涛涛饶博
Owner WUHAN AVIATION INSTR
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