Method for evaluating cavitation and cavitation erosion resistance of underwater high-speed navigation body

A technology of airborne body and capability, applied in design optimization/simulation, instrumentation, calculation, etc., can solve problems such as insufficient nuclear load characteristics, and achieve the effect of good resistance to cavitation and cavitation.

Active Publication Date: 2020-09-25
HARBIN ENG UNIV
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Problems solved by technology

However, at present, there are few numerical studies on the formation mechanism of wandering cavities by boundary element method, and there is still insufficient understanding of the motion characteristics of the gas core under the coupling effect of the flow field around the structure and the structure boundary.

Method used

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  • Method for evaluating cavitation and cavitation erosion resistance of underwater high-speed navigation body
  • Method for evaluating cavitation and cavitation erosion resistance of underwater high-speed navigation body
  • Method for evaluating cavitation and cavitation erosion resistance of underwater high-speed navigation body

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings.

[0034] The invention is suitable for forecasting the motion and load characteristics of bubbles in the background flow field and near structures, and can predict the physical process of nucleation and cavitation of gas nuclei in local low-pressure areas near high-speed navigation structures, and can be used in cavitation of water conservancy machinery and underwater explosions. , microfluidics, medicine, chemical industry and other fields have broad application prospects.

[0035] The invention studies the motion characteristics of the cavitation core in the induced flow field of the underwater high-speed moving body, obtains the velocity and pressure of the flow field through numerical calculation, and reveals the mechanical mechanism of the cavitation erosion. Establish a model based on the actual geometry of the vehicle, and evaluate the cavitation and erosion resis...

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Abstract

The invention belongs to the technical field of bubble dynamics, and particularly relates to a method for evaluating cavitation and cavitation erosion resistance of an underwater high-speed navigationbody. According to the method, the motion characteristics of the cavitation core in the underwater high-speed motion navigation body induced flow field are studied, the speed and pressure of the flowfield are obtained through numerical calculation, and the mechanical mechanism of cavitation erosion is disclosed. A model is established according to the actual geometry of a navigation body, the cavitation and cavitation erosion resistance of the navigation body is evaluated by observing pulsation, migration, jet flow and other behaviors of a single gas nucleus near the navigation body, and guidance is provided for designing a navigation body structure with better cavitation and cavitation erosion resistance.

Description

technical field [0001] The invention belongs to the technical field of bubble dynamics, and in particular relates to an evaluation method for cavitation and cavitation erosion resistance of an underwater high-speed navigation body. Background technique [0002] When a large number of micron-sized gas nuclei in water flow near the low-pressure area of ​​high-speed navigation structures or high-speed rotating machinery, due to the reduction of environmental pressure and the effect of surface tension, they will grow explosively and form cavitation bubble groups, which is called hydraulic cavitation phenomenon. The cavitation phenomenon not only reduces the propulsion efficiency of the propeller and increases the resistance of the vehicle, but also causes non-spherical pulsation under the action of the non-uniform flow field and the structure boundary while the cavitation bubbles move downstream with the flow, and the collapse The high-speed water jet directed at the surface of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28G06F113/08G06F119/14G06F111/10
CPCG06F30/28G06F2113/08G06F2119/14G06F2111/10
Inventor 李帅胡振宇张阿漫韩蕊王诗平刘云龙崔璞刘念念
Owner HARBIN ENG UNIV
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