Empennage stable high-speed supercavitation projectile

A technology of supercavitation and fins, which is applied in the direction of projectiles, offensive equipment, weapon types, etc., can solve the problems of high resistance of underwater projectiles, poor trajectory stability, and fast velocity attenuation, etc., to achieve increased range and reduced viscous resistance , the effect of reducing fluid resistance

Inactive Publication Date: 2018-11-20
BEIJING INST OF ELECTRONICS SYST ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of existing underwater projectiles with high resistance, fast velocity attenuation, short

Method used

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  • Empennage stable high-speed supercavitation projectile
  • Empennage stable high-speed supercavitation projectile
  • Empennage stable high-speed supercavitation projectile

Examples

Experimental program
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Effect test

Embodiment 1

[0035] refer to Figure 1-Figure 4 , The empennage-stabilized high-speed supercavitation projectile in this embodiment consists of four parts, namely a flat-head disc cavitator 1, a shoulder truncated cone transition section 2, a rear cylinder 3, and a tail triangular empennage 4. The head cavitator in this embodiment adopts a flat-head disc cavitator, and its flat head and sharp edges induce cavitation when moving at high speed, and in order to make the maximum cross-sectional area of ​​the generated cavitation not smaller than the cross-sectional area of ​​the projectile , it should be ensured that the value of the flat head disc cavitator 1 is within a certain reasonable range, and its diameter D is usually selected n It is 1 / 4~1 / 3 of the diameter D of the rear cylinder 3, in this embodiment D n Take 4mm, the length L of the head cavitator n Take 2mm, the taper angle α of the shoulder truncated cone transition section 2 is taken as 6°, the diameter D of the rear cylinder ...

Embodiment 2

[0037] refer to Figure 5 and Figure 6 The difference between this embodiment and Embodiment 1 is that a plurality of annular grooves are provided in the middle of the projectile body, specifically, the surface of the rear cylinder 3 is provided with such as figure 2 The multiple annular grooves shown in , the projectile body bears the force of the projectile rest on the projectile body through the grooves when launching, disperses and bears the huge impact force during launch, and reduces the excessive instantaneous impact on the bottom of the projectile during launch and causes Structural damage.

Embodiment 3

[0039] The difference between this embodiment and Embodiment 1 and Embodiment 2 is that the head flat disk-shaped cavitator 1 of the projectile adopts Figure 7 , Figure 8 In order to facilitate the stability of entering the water and the stability of the ballistic trajectory of the underwater movement, the cone head cavitator in the model usually adopts a cone head cavitator with a larger cone angle, which can be 120°, 135°, etc. The supercavitation generated by the carburetor can completely wrap the projectile, and the bottom surface diameter D of the head cone cavitator should be guaranteed n Not less than 1 / 4 of the diameter D of the rear cylinder 3, generally 1 / 4 to 1 / 3.

[0040] The head cavitator adopts a flat-head disc-shaped cavitator or a cone-shaped cavitator. The cavitator has a clear outline. When the projectile moves at high speed in water, the edge of the cavitator starts to cavitate first, and further increases with the speed. Induce supercavitation that com...

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PUM

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Abstract

The invention discloses an empennage stable high-speed supercavitation projectile. A projectile body comprises a head cavitation device, a shoulder frustum transition section, a rear cylinder and a tail empennage. The empennage stable high-speed supercavitation projectile adopts a supercavitation drag reduction principle, the resistance at the underwater high-speed supercavitation movement stage is reduced by 80% or above compared with the resistance of an ordinary projectile not adopting the supercavitation drag reduction technology, under the same initial launching speed condition, the rangeof the empennage stable high-speed supercavitation projectile is greatly increased compared with the range of the ordinary projectile, and the speed storage performance of the projectile is relatively excellent. Due to the fact that the projectile is additionally provided with the empennage, the trajectory stability of the underwater high-speed supercavitation projectile is remarkably improved, the problems that the trajectory of the ordinary projectile is prone to bending and is poor in linearity are solved, and the linearity and the predictability of the trajectory are greatly improved.

Description

technical field [0001] The invention relates to the field of projectile technology. More specifically, it relates to a fin-stabilized high-speed supercavitating projectile. Background technique [0002] Mines and torpedoes are common weapons in underwater warfare, but for a long time, there have been fewer viable means of countering mines or short-range counter-torpedoes. With the in-depth research and application of supercavitation technology, it has become a feasible means to use supercavitation technology for high-speed underwater projectiles to counter mines or short-range anti-torpedoes. [0003] When the vehicle moves at high speed underwater, a low-pressure area is formed around it due to the high-speed water flow. When the pressure in the low-pressure area is lower than the local saturated vapor pressure, the liquid will vaporize, thereby generating bubbles that partially cover or completely wrap the vehicle, that is, Cavitation, when fully enveloping the vehicle, ...

Claims

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Application Information

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IPC IPC(8): F42B10/06F42B10/38
CPCF42B10/06F42B10/38
Inventor 赵成功王俊波王亚丽杨晓锋盛跃宾
Owner BEIJING INST OF ELECTRONICS SYST ENG
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