Aerodynamic configuration of air-drop forest fire extinguishing bullet

Abstract

The invention discloses an aerodynamic configuration of an air-drop forest fire extinguishing bullet. The aerodynamic configuration adopts a stable empennage type layout and comprises a bullet head, a bullet body, a bullet tail and eight empennages, wherein the bullet head is located at the front end, the bullet body is located in the middle portion, the bullet tail is located at the tail portion, the eight empennages are arranged at the tail portion of the bullet body in the circumferential direction, the bullet head is spherical or ellipsoidal, a length of the bullet head accounts for 12% to 14% of a length of the whole bullet, the bullet body is a standard cylinder, a length of the bullet body accounts for 43% to 50% of the length of the whole bullet, the bullet tail is a cone-cylinder assembly, a length of the bullet tail accounts for 36% to 44% of the length of the whole bullet, a ratio of a conical section to a column section of the bullet tail is 1:(2.5 to 3.5), a diameter of the column section of the bullet tail is 0.43 to 0.57 of a diameter of the bullet body, and a slenderness ratio of the bullet is 3.7 to 4.3. According to the aerodynamic configuration, the filling space is large, the stability is high, the structure is rational, and the space is saved during storage.

Description

technical field [0001] The invention belongs to the technical field of fire extinguishing bombs, in particular to an aerodynamic shape of an air-dropped forest fire extinguishing bomb. Background technique [0002] The aerodynamic layout is also called the aerodynamic configuration, which refers to the form in which the aerodynamic surfaces, such as the empennage, are mutually arranged along the circumferential and axial directions of the body. font, ring, T or improved ring. [0003] Fire extinguishing bomb is a new type of uncontrolled bomb mainly used for forest fire extinguishing. It has the characteristics of low cost and deep fire extinguishing. It requires good shape stability and more filling of fire extinguishing agent. The forest fire extinguishing bombs can be dropped in designated areas by firefighters and delivery devices to implement long-distance, efficient and safe fire extinguishing operations. At present, the research on forest fire extinguishing bombs in...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the aerodynamic shape of the hand-throwing and long-distance launch fire extinguishing bombs in the prior art cannot meet the aerodynamic shape requirements of the air-dropped forest fire extinguishing bomb, it aims to obtain a large loading space by designing the shape of the head, the body, and the stabilized tail. The shape of the air-dropped forest fire-extinguishing bomb with excellent aerodynamic performance indicators. The present invention provides an air-dropped forest fire-extinguishing bomb with an aerodynamic shape, which adopts a stable tail fin layout, including a warhead, a bomb body, a tail and 8 tail fins;

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