Analysis of gas flow losses in a gas-operated gun

Tran, Dinh Que; Nguyễn, Minh Phú; Vo, Van Bien; Nguyen, Duy Phon; Macko, Martin; Vitek, Martin

doi:10.1109/icmt58149.2023.10171337

Cited by 4 publications

(4 citation statements)

References 8 publications

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“…To solve the basic problem of interior ballistic by theoretical methods, the influence of other factors is taken into account by the experiment coefficient. The following assumptions are used to solve the interior ballistic problem of a solid-fuel rocket engine, see in [9][10][11][12]: -The igniter ignites instantaneously, then at t = 0, p = p in ; -The propellant burns according to the laws of geometry; -Static pressure does not change along the combustion chamber and is equal to the braking pressure at the nozzle outlet; -The temperature of the combustion gas in the combustion chamber T 0 does not change and is equal to:…”

Section: Set Up the Interior Ballistic Problem A) Assumptionsmentioning

confidence: 99%

Research on the Working Characteristics of Solid-Fuel Rocket Engines

2024

International Journal of Science and Engineering Applications

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This article presents a method for building a mathematical model to determine the working parameters of a solid-fuel rocket engine. By changing some structural parameters around the initial values, the working characteristics of the rocket engine were investigated to evaluate the reliability of the designed structural parameters. The C5K solid-fuel rocket engine was selected to verify the model. The survey results show that: the volume of the combustion chamber increases by 20%, pressure decreases by 1.07%, thrust decreases by 1.07%, and engine working time increases by 2.9%. In addition, the change in critical cross-sectional diameter and the length of the propellant rod also significantly affects the thrust and working time of the engine. The results of the article are used as a theoretical basis to calculate and design rocket engines to ensure high accuracy.

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Section: Set Up the Interior Ballistic Problem A) Assumptionsmentioning

confidence: 99%

Research on the Working Characteristics of Solid-Fuel Rocket Engines

2024

International Journal of Science and Engineering Applications

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“…x -The distance the bullet moves through the barrel. Equation of motion of the warhead: The sum of the force moments acting on the cannon trough: (12) where Q0 -weight of the recoil part; u -reaction force of the dental arch of the range structure; ς0 -preliminary circular radius of the tooth arch of the reach mechanism; lx -the lever arm of the warhead's gravity relative to the axial axis;…”

Section: Fig 2 Diagram Of Forces Acting On the Range Block When Firingmentioning

confidence: 99%

Research on the Influence of Some Factors on the Departure Angle of Warheads When Firing a Series

Bien,

Vinh,

Manh

et al. 2023

ETJ

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In this article, the equation for determining the projectile's departure angle taking into account the effects of several shot parameters is established. The parameters of the shot include the speed of rotation around the axis of the rotating part when fired; and the curvature of the barrel due to the temperature of the shot. Numerical calculations are applied to 37mm anti-aircraft guns. Research results show that: The speed of rotation around the axis of the rotating part when firing has a significant effect on all types of artillery, especially on long-barreled artillery; While the shot temperature significantly affects the departure angle of the warhead when firing in series. This influence causes errors in the firing. The departure angle becomes larger as the rotation speed becomes faster; The departure angle of the bullet when firing the 5th, 10th, and 15th bullets is 0.0117, 0.015, 0.0175, 0.0185, 0.0199, and 0.0206 rad, respectively, when taking into account the shot temperature. This result is used as data to provide effective barrel design solutions and barrel cooling methods

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“…Research [9][10][11] has shown the influence of losses occurring in the gas chamber such as heat loss, flow constriction loss, or friction loss. In addition, the influence of the position of the gas block hole, the diameter of the gas block hole, and the initial volume of the gas chamber are also presented in the literature [12][13][14][15][16]. However, there have been no studies that have built a model to study the relationship between the gas block hole crosssection and the gas exhaust hole cross-section.…”

Section: Introductionmentioning

confidence: 99%

Research on the Influence of Some Structural Parameters of a gas Chamber on the Movement of a gas-Operated Automatic Mechanism

2023

International Journal of Science and Engineering Applications

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This article has established a mathematical model to evaluate the influence of several structural parameters of the gas chamber on the movement of the gas-operated automatic mechanism during single and series firing. Parameters such as the area of the gas block hole, the gap area between the piston and the gas chamber, and the area of the gas exhaust hole significantly affect the movement of the automatic machine. The velocity of the bolt carrier, the movement cycle of the bolt carrier, and the pressure in the gas chamber are used to evaluate the influence of these parameters. Numerical calculations are applied to the PKMS machine gun. Calculation results show that: The maximum velocity of the bolt carrier corresponding to the number of gas exhaust holes on the PKMS machine gun is 0 holes, 1 hole, and 2 holes, respectively 4.913 m/s; 3.625m/s; 2.424 m/s. The calculation results are the scientific basis to evaluate the reliability of the gas exhaust section adjustment part during the firing process, providing the necessary energy to supply the automatic machine to work in adjustment cases. This result can be applied to survey and calculate the design of gas chambers for machine guns working on the principle of gas block.

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Analysis of gas flow losses in a gas-operated gun

Cited by 4 publications

References 8 publications

Research on the Working Characteristics of Solid-Fuel Rocket Engines

Research on the Working Characteristics of Solid-Fuel Rocket Engines

Research on the Influence of Some Factors on the Departure Angle of Warheads When Firing a Series

Research on the Influence of Some Structural Parameters of a gas Chamber on the Movement of a gas-Operated Automatic Mechanism

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