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Method for sealing acoustic seal device

A sealing device and equation technology, applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve problems such as poor sealing effect

Inactive Publication Date: 2012-07-25
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiency of poor sealing effect of the existing acoustic sealing device sealing method, the present invention provides a sealing method of the acoustic sealing device

Method used

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  • Method for sealing acoustic seal device
  • Method for sealing acoustic seal device
  • Method for sealing acoustic seal device

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Experimental program
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Embodiment Construction

[0026] Referring to the accompanying drawings, in step P1002, the Navier-Stokes equation is used to establish a two-dimensional momentum conservation equation and a mass conservation equation in which the cylindrical coordinate system is fixedly connected to the resonant tube:

[0027] ∂ ∂ t ∫ Ω ρ v z dΩ + ∫ S ρ v z vgndS = ∫ S { [ 2 μ ∂ v z ∂ z - 2 3 μ ( ∂ v z ...

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PUM

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Abstract

The invention discloses a method for sealing an acoustic seal device, which is used for solving the technical problem of a poor sealing effect of an existing method for sealing an acoustic seal device. The technical scheme includes that a two-dimensional momentum conservation equation and a mass conservation equation of fluid in a resonance tube are built by the aid of a Navier-Stokes equation, and standing waves in the resonance tube are solved on the basis of the two-dimensional momentum conservation equation and the mass conservation equation. The standing waves in the resonance tube are solved in a time domain by the aid of a SIMPLEC algorithm by means of iterative computation. The shape of the resonance tube is optimized in order to minimize mass flow at a high-pressure port of the resonance tube by the aid of a quasi-Newton optimization method, accordingly, leakage of the fluid can be reduced, and the purpose of improving a sealing effect of the acoustic seal device is finally achieved.

Description

technical field [0001] The invention relates to a sealing method, in particular to a sealing method of an acoustic sealing device. Background technique [0002] Document 1 "US Patent No. US 7,086,648 B1" discloses an acoustic sealing device. The acoustic sealing device refers to the installation of a non-straight cylindrical resonant tube between the high-pressure and low-pressure airflow areas that require dynamic sealing, and the rotor passes through the resonant tube. The resonant tube is excited to vibrate axially by a linear motor or other mechanical devices. When the excitation frequency is consistent with the natural frequency of the sound field in the resonant tube, a resonant standing wave will be generated in the resonant tube. When the resonant standing wave is equivalent to the external high-pressure airflow, the airflow is prevented from flowing from the high-pressure area to the low-pressure area to achieve the purpose of sealing. The shape of the resonant tu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/44
Inventor 宁方立董梁张文治王善景马尧王康
Owner NORTHWESTERN POLYTECHNICAL UNIV