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Generation method of turbulent flow entry data

A technology of inlet data and turbulent flow, which is applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems that the thickness of the boundary layer at the inlet cannot meet the given conditions, the average profile drift, etc., to ensure authenticity and effectiveness sexual effect

Inactive Publication Date: 2015-06-10
INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
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Problems solved by technology

This type of method will cause the drift of the average profile after long-time integration, resulting in the thickness of the boundary layer at the entrance cannot meet the given conditions

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  • Generation method of turbulent flow entry data
  • Generation method of turbulent flow entry data
  • Generation method of turbulent flow entry data

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Embodiment Construction

[0024] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] The invention discloses a method for generating turbulent inlet data, which specifically includes the following steps: step 1, obtaining the average parameter at the inlet section; After the eigenfeature decomposition processing in , then perform proportional transformation according to the similarity law, and then use the result as the pulsation parameter of the inlet; Step 3, add the average parameter and the pulsation parameter to synthesize the instantaneous parameter of the turbulent flow inlet. On the one hand, the present invention obtains the average parameter at the inlet section, and on the other hand, processes the downstream flow information and introduces it upstream as the pulsation parameter of the upstream inlet, and adds the average parameter and the pulsation parameter to synthesize the instantaneous para...

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Abstract

The invention discloses a generation method of turbulent flow entry data. The generation method specifically comprises the following steps: step one, obtaining average parameters of an entry cross-section position; step two, extracting pulsation information from a downstream recovery section, decomposing spatial intrinsic features of the pulsation information, performing proportion transformation according to a similarity law, and then taking results as pulsation parameters of an entry; step three, adding the average parameters and the pulsation parameters to form instantaneous parameters of the turbulent flow entry. With adoption of the generation method, the obtained boundary conditions of turbulent flow are fully close to the actual turbulent flow data, and can effectively guarantee the authenticity and validity of the main simulation.

Description

technical field [0001] The invention relates to the technical field of fluid mechanics, and discloses a method for generating turbulent flow inlet data. Background technique [0002] The boundary layer is the simplest of all flow phenomena, and even for such a simple model, as it develops downstream, it goes through a laminar phase, then a transition phase where the laminar to turbulent flow transitions, and finally fully developed turbulent flow stage. The complex flow phenomena experienced in this process have not been fully understood so far. At the same time, the turbulent boundary layer involves many aspects in the industrial field, such as turbulent drag reduction, turbulent noise, turbulent vibration, etc., and all of these need to start from the simplest boundary layer flow research and gradually move toward practical applications, so the boundary layer becomes Fundamentals of turbulence research. [0003] For the spatially developed turbulent boundary layer, it i...

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Application Information

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IPC IPC(8): G06F19/00
Inventor 张兆黄思源王元靖陶洋赵忠良
Owner INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
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