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Unsteady cavitation flow field visualization test data processing method

A test data, unsteady technology, applied in the field of multiphase fluid mechanics, can solve the problem of large amount of data, unable to clearly and intuitively reflect the unsteady flow field structure, difficult to accurately capture the flow field structure time change law flow field structure statistics Data and other issues to reduce costs, improve display effects, and improve processing efficiency

Active Publication Date: 2017-11-21
BEIJING RES INST OF MECHANICAL & ELECTRICAL TECH
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Problems solved by technology

With the development of test technology, flow field measurement equipment such as high-speed camera and particle image velocimetry system are gradually applied to cavitation research. However, due to the remarkable unsteady characteristics of cavitation The momentary flow field information, using animation to process the acquired instantaneous flow field structure involves a large amount of data, and it is difficult to accurately capture the change of the flow field structure over time and the statistical data of the development and evolution of the flow field structure, which cannot be clearly and intuitively Unsteady flow field structures such as cavitation-collapse, cavitation periodic shedding, etc.

Method used

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Embodiment Construction

[0023] In order to make the purpose, content, and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] The invention provides a method for processing unsteady cavitation flow field visualization test data, comprising the following steps:

[0025] Step 1: Unsteady cavitation flow field visualization test data acquisition

[0026] The high-speed camera technology is used to obtain the display image of the unsteady cavitation flow field within a certain period of time, and the sampling frequency and shooting time of the high-speed camera are selected according to the unsteady characteristics of the cavitation flow field. For the tip vortex cavitation in this paper, the sampling frequency is selected as 2000 frames per second, and the shooting time is 1 second, and a total of 2000 continuous two-dimensional images of...

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Abstract

The invention relates to an unsteady cavitation flow field visualization test data processing method, and belongs to the multiphase fluid mechanics technical field; the method can fully considers the cavitation flow unsteady characteristics, thus improving the visualization test data processing efficiency, and reducing cost; the method can make statistics analysis for an unsteady cavitation flow field structure, thus accurately and efficiently obtaining the unsteady cavitation flow field characteristic parameters like a cavity shedding period, a cavity area and a cavitation vortex strip average length, and improving the unsteady characteristic display effect.

Description

technical field [0001] The invention relates to the technical field of multiphase fluid mechanics, in particular to a data processing method for unsteady cavitation flow field visualization test. Background technique [0002] The unsteady process of cavitation includes various complex flow phenomena such as the formation, development, pulsation, fracture, cavitation shedding and collapse of cavitation. These physical phenomena are related to underwater weapons in the field of aerospace, weapons across water and air, and The development and production of fluid machinery in the field of energy development is closely related to national security and national economic development. Therefore, it is of great scientific significance and engineering value to carry out research on the characteristics of cavitation unsteady flow. [0003] Due to the complexity of unsteady cavitation flow, experimental research has always been the basic method to promote people's understanding of cavi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M10/00
CPCG01M10/00
Inventor 赵宇张健王靖范国芳操小龙
Owner BEIJING RES INST OF MECHANICAL & ELECTRICAL TECH
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