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Experimental device and measurement method of rotating cylinder icing and ice adhesion measurement

An experimental device and adhesion technology, applied in the field of aircraft safety, can solve problems such as expensive costs, large manpower and material resources, and achieve the effect of easy disassembly and transportation, avoiding excessive waste, and achieving maximum utilization.

Active Publication Date: 2016-08-31
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The test in the ice wind tunnel environment is closer to the real flight environment, but due to the high cost and large manpower and material resources, and the establishment of the ice wind tunnel requires a large number of advanced scientific foundations and sophisticated testing equipment and other conditions, it cannot be used as a Routine research testing tools

Method used

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  • Experimental device and measurement method of rotating cylinder icing and ice adhesion measurement
  • Experimental device and measurement method of rotating cylinder icing and ice adhesion measurement
  • Experimental device and measurement method of rotating cylinder icing and ice adhesion measurement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The size of the selected cylindrical test piece is: length 160mm, diameter 10mm. The material of the experimental piece is aluminum.

[0047] The set freezing temperature is -15°C, the pressure of the air delivery pipeline is 0.2MPa, and the pressure of the pure water delivery pipeline is 0.1MPa. According to the actual performance specification of the nozzle, the corresponding liquid water droplet diameter is 20μm (such as Image 6 As shown, after the nozzle design is finalized, the manufacturer will conduct a series of calibration experiments to determine the diameter of water droplets under different water pressure and air pressure conditions. Therefore, the manufacturer will provide an instruction to determine the size of the droplet diameter according to their manufacturer's curve). Set the freezing time to 8-10 minutes. The freezing time after freezing is 4-6 minutes.

[0048] The measurement steps are as follows:

[0049] 1) Debug and inspect the correspondin...

Embodiment 2

[0059] The size of the selected cylindrical test piece is: length 160mm, diameter 10mm. The material of the experimental piece is stainless steel.

[0060] The set freezing temperature is -30°C, the pressure of the air delivery pipeline is 0.3MPa, and the pressure of the pure water delivery pipeline is 0.25MPa. According to the actual performance specification of the nozzle, the corresponding liquid water droplet diameter is 30μm. Set the freezing time to 9 minutes. The freezing time after freezing is 5 minutes.

[0061] The measurement steps are as follows:

[0062] 1) Debug and inspect the corresponding parts of the whole device: reliability detection of the adjustment switch in the device, operation test of the KingView monitoring program, reliability detection of the data acquisition module and various sensors, and coaxiality detection in the mechanical transmission system And motor forward and reverse settings.

[0063] 2) One end of the test piece 5 is connected to t...

Embodiment 3

[0069] The size of the selected cylindrical test piece is: length 160mm, diameter 10mm. The material of the experimental piece is a polymer (polytetrafluoroethylene) material.

[0070] The set freezing temperature is -5°C, the pressure of the air delivery pipeline is 0.6MPa, and the pressure of the pure water delivery pipeline is 0.3MPa. According to the actual performance specification of the nozzle, the corresponding liquid water droplet diameter is 10μm. Set the freeze time to 9 minutes. Freezing time after freezing is 5 minutes.

[0071]1) Debug and inspect the corresponding parts of the whole device: reliability detection of the adjustment switch in the device, operation test of the KingView monitoring program, reliability detection of the data acquisition module and various sensors, and coaxiality detection in the mechanical transmission system And motor forward and reverse settings.

[0072] 2) One end of the test piece 5 is connected to the shaft 7 by a coupling 6, ...

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Abstract

The invention relates to an experiment device and a measurement method for measuring adhesive power of rotary cylindrical ice and an ice layer. The experiment device comprises a refrigerating system, a water spraying system, a mechanical transmission system and a data acquisition system. The experiment device can keep the temperature in a heat preservation box in an icing phase and an adhesive power measuring process constant; a stepping motor drives a cylinder to rotate at a constant speed to carry out an icing experiment; and then the stepping motor is used for driving a thread transmission mechanism to load at a constant speed by a controllable loading speed to carry out an adhesive power measuring experiment. The thread transmission mechanism is used for converting rotary movement into linear movement to combine a cylindrical icing experiment table and an ice layer adhesive power measuring experiment table to form a whole body; the measurement of the adhesive power can be finished under the condition of no need of moving an iced experiment workpiece; and the experiment error is reduced and the measurement accuracy is improved. According to the device and the method, large-size equipment including an icing wind tunnel and the like for carrying out an icing mechanical property research and a lot of manpower and material resources, and financial resources are avoided, and the practicability is strong.

Description

technical field [0001] The invention relates to the technical field of aircraft safety, in particular to an experimental device and a measurement method for measuring the icing of a rotating cylinder and the adhesion force of the ice layer. Background technique [0002] When the aircraft passes through the cloud layer containing supercooled water droplets, the windward surface such as the lift surface of the wing and tail, and the leading edge of the air inlet will freeze, which poses a serious threat to flight safety. Therefore, reasonable anti-icing and deicing measures are required. measure. Mechanical deicing is one of the widely used anti-icing protection measures. Before designing an efficient mechanical deicing system, it is necessary to first determine the adhesion characteristics of the ice layer and the surface of the component. Only when the force provided by the mechanical system is greater than the ice The purpose of deicing can only be achieved when the adhesi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N19/04
Inventor 朱程香朱春玲苗波孙卫平巫瑞锐崔宁王渊
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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