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Combined type cavitator

A cavitator and combined technology, which is applied to ships, hydrodynamic characteristics/hydrostatic characteristics, hulls, etc., can solve the problems of small critical cavitation number of supercavitation and poor shape stability of supercavitation

Inactive Publication Date: 2015-05-06
CHINA ACAD OF AEROSPACE AERODYNAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the appearance of cavitators is mainly two types: disc type and conical type. These two types of cavitators have simple structures, but the critical cavitation number of supercavitation is small and the shape stability of supercavitation is poor.

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0014] like figure 1 As shown, the combined cavitator is composed of a cone and a truncated cone. The front part is a cone part, and the rear part is a truncated cone part. The diameter of the bottom surface of the front end of the platform part is smaller than the diameter of the bottom surface of the cone part, and the rear end of the cone part is provided with a pin hole for installing the combined cavitator on the head of the vehicle.

[0015] The total length of the combined cavitator is 0.5 to 0.9 times the diameter of the vehicle, the angle of the top of the cone is 60° to 120°, and the height of the cone is 0.2 to 0.4 times the diameter of the vehicle. The height of the round platform is 0.3-0.5 times the diameter of the vehicle body, the diameter of the upper bottom surface is 0.05-0.1 times the diameter of the vehicle body, and the diameter of the lower bottom surface is 0.1-0.3 times the diameter of the vehicle body.

[0016] like figure 2 As shown, the underwate...

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Abstract

The invention provides a combined type cavitator which comprises a cone part and a truncated-cone part. The cone part is arranged on the front section and the truncated-cone part is arranged on the rear section. The upper bottom face with the small diameter of the truncated-cone part is connected with the bottom face of the cone part. The diameter of the upper bottom face of the truncated-cone part is smaller than the diameter of the bottom face of the cone part. A pin hole is formed in the rear end of the truncated-cone part and used for allowing the combined type cavitator to be installed on a head of a navigation body. Due to the fact that the combined type cavitator is installed in the center of the head of the underwater navigation body, super-cavitation flow can be achieved at the low navigation speed or the large background pressure, and the problems that resistance is too large and the navigation speed is low when the navigation body navigates underwater are effectively solved.

Description

technical field [0001] The invention relates to a combined cavitator, which is applied to the hydrodynamic layout design of a supercavitating aircraft body. Background technique [0002] Supercavitation drag reduction is a new principle and new way to realize ultra-high-speed underwater movement. In order to realize the drag reduction of supercavitation and ensure the stability of hydrodynamic characteristics, not only the generation of supercavitation is required, but also the generation of supercavitation is required. The bubble should have a specific shape and maintain the stability of the supercavitation shape during the movement of the underwater vehicle. [0003] The cavitator is an important device for generating and maintaining supercavitation during high-speed underwater movement, and is one of the key technologies in the design of supercavitating vehicles. Create cavitation conditions and adjust the shape of supercavitation. At present, the appearance of cavitato...

Claims

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Application Information

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IPC IPC(8): B63B1/38
CPCY02T70/10
Inventor 李国良田俊武
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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