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Numerical Prediction Method of Fluid-Structure Interaction for Jumping Near Water Surface Based on Mesh Control

A fluid-solid coupling and numerical prediction technology, applied in the field of near-water vehicles and ships, can solve the problems of high cost and difficulty in near-water gliding and jumping experiments, achieve high-precision numerical prediction, save experimental costs and time, and reduce risks The effect of the coefficient

Active Publication Date: 2020-09-15
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of high difficulty and high cost in the experiment of skidding and jumping near the water surface, and propose a numerical prediction method for the fluid-structure coupling of the skidding and jumping near the water surface based on grid control

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  • Numerical Prediction Method of Fluid-Structure Interaction for Jumping Near Water Surface Based on Mesh Control
  • Numerical Prediction Method of Fluid-Structure Interaction for Jumping Near Water Surface Based on Mesh Control
  • Numerical Prediction Method of Fluid-Structure Interaction for Jumping Near Water Surface Based on Mesh Control

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Embodiment 1

[0055] The shape of the water-touching object selected in this embodiment is an ellipse (referred to as a rigid body). The bottom surface of the rigid body is located at a position 80 mm away from the still water surface. The pitch angle is 0°, the attack angle is 2°, and the initial velocity of entering the water is 100 m / s.

[0056] The specific process of a fluid-solid coupling numerical prediction method based on grid control for skidding and jumping near the water surface, as shown in figure 1 As shown, it is mainly realized by the following steps:

[0057] Step 1: Establishment of 3D watershed model.

[0058] For the geometric shape of the rigid body, confirm that its center point is the coordinate origin of the overall watershed, and determine the geometric parameters of the watershed: the inner domain is a circle whose diameter is twice the long axis of the rigid body; It is a circular square; the outer domain is a cuboid area surrounding all domains, the left end of ...

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Abstract

The invention relates to a near-water surface gliding jumping fluid-solid coupling numerical prediction method based on grid control, and belongs to the technical field of ships and near-water surfacevehicles. According to the method, a computational fluid mechanics model is established through three-dimensional drainage basin model and grid division, a grid control method is established, near-water surface gliding jump flow field calculation is carried out, then a calculation result is subjected to post-processing, and dynamic information of near-water surface jump changing along with time is obtained. The influence of two-phase flow and structural motion is fully considered, and the credibility of a numerical calculation result is improved; and high-precision numerical prediction can becarried out on the near-water surface bounce phenomenon, the design working conditions of different pitch angles and attack angles of the water touching object are achieved, and the experiment cost and time are saved.

Description

technical field [0001] The invention relates to a grid control-based fluid-solid coupling numerical prediction method for skidding and jumping near the water surface, and belongs to the technical field of ships and near-water vehicles. Background technique [0002] In recent years, with the rapid development of science and technology applications, the near-water gliding and jumping technology has stronger flexibility and penetration capabilities than the water flying and underwater navigation technologies. Compared with cross-medium water entry experiments and water navigation experiments, the experiment of sliding and jumping near the water surface is more difficult and costly, resulting in a lower success rate of the experiment. Since the 1990s, with the development of computer equipment and the advancement of computing technology, the traditional experimental research has gradually shifted to the research mode combining numerical and experimental research. At present, th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F111/10
Inventor 王国玉陈倩吴钦黄彪张汉哲刘韵晴
Owner BEIJING INSTITUTE OF TECHNOLOGYGY