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Reconstruction method for size distribution of frozen cloud droplets

A droplet size and droplet technology, applied in the field of wind tunnel tests, can solve the problems of unable to realize the full-scale measurement of droplets of icing clouds and parametric expression of icing clouds

Active Publication Date: 2021-08-13
LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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Problems solved by technology

[0004] At present, domestic icing wind tunnels usually use a single-principle measuring instrument to measure the droplet size distribution characteristics of clouds and fog. Covering three orders of magnitude from the micron scale to the millimeter scale, a single instrument can only measure a small range of droplet sizes, and cannot achieve full-scale measurement of liquid droplets in icing clouds, so it is impossible to measure icing clouds. parametric expression of

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  • Reconstruction method for size distribution of frozen cloud droplets
  • Reconstruction method for size distribution of frozen cloud droplets
  • Reconstruction method for size distribution of frozen cloud droplets

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[0034] Aspects of the invention will be described more fully hereinafter with reference to the accompanying drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this invention. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Based on the teachings herein one skilled in the art will appreciate that the scope of the invention is intended to encompass any aspect disclosed herein, whether implemented alone or in combination with any other aspect of the invention. For example, it may be implemented using any number of means or implementations presented herein. Additionally, in addition to the aspects of the invention presented herein, the scope of the invention is intended to encompass an apparatus or method implemented using other structures, f...

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Abstract

The invention is suitable for the technical field of wind tunnel tests, and provides a reconstruction method for size distribution of frozen cloud droplets, which comprises the following steps: dividing a droplet size measurement interval into a plurality of droplet size channels, and calculating the droplet number density, the first liquid water content and the standard liquid water content in each droplet size channel; determining a cut-off liquid drop size channel in the liquid drop diameter measurement interval, determining a lap-joint liquid drop size channel, and calculating the liquid water content in the lap-joint liquid drop size channel; and reconstructing the size distribution of frozen cloud liquid drops. According to the invention, the technical problem in the prior art that only a small droplet size range can be measured by using a single instrument is solved, and the droplet size distribution and characteristic parameters of the full droplet spectrum can be obtained from the measurement results of different instruments, namely, the full-size measurement of the droplets of the frozen cloud and parameterized expression of the frozen cloud are realized.

Description

technical field [0001] The invention belongs to the technical field of wind tunnel tests, and in particular relates to a method for reconstructing the size distribution of icing cloud and fog droplets. Background technique [0002] When an aircraft is flying in clouds, supercooled water droplets (ie, liquid water droplets whose temperature is below freezing point) in the clouds will continuously hit the windward side of the aircraft, causing the surface to freeze. Aircraft icing widely exists in flight practice and seriously threatens flight safety. [0003] The icing wind tunnel is an important ground test equipment for aircraft icing research and aircraft component anti-icing system verification, and it plays an important role in aircraft icing airworthiness certification. The ability to simulate the icing cloud and fog environment is the core content of the performance of the icing wind tunnel. Accurate measurement and evaluation of the microphysical characteristics of ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/02G06F30/20
CPCG01M9/02G06F30/20G06F2113/08
Inventor 郭向东郭奇灵陈舒越赵献礼王梓旭
Owner LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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