Linear Laser Ignition for Hollow-Center Artillery Propellant
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Solution Overview
Problem
Conventional laser ignition devices for large-caliber artillery propellants with a hollow center face challenges in efficiently transmitting energy to the entire propellant due to their circular laser shape, leading to prolonged ignition times.
Innovation Solution
A laser ignition system that converts the circular laser shape into a linear shape using a Powell lens, ensuring even combustion in both longitudinal and radial directions by maximizing the exposed area of the ignition tube, thereby minimizing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a circular laser shape is used for ignition, then the laser device structure is simple, but the ignition time is prolonged and energy transmission efficiency is low
Solution Approach 1:
The patent changes the shape parameter of the laser beam from circular to linear by using a Powell lens. This parameter change allows the laser energy to be distributed along a linear path that matches the hollow center structure of the propellant, thereby reducing ignition time while maintaining relatively simple device structure.
Solution Approach 2:
The patent transforms the two-dimensional circular laser beam into a one-dimensional linear laser beam by passing it through a Powell lens. This dimensional reduction concentrates the energy transmission path to match the hollow center geometry, improving energy transmission efficiency and reducing ignition time.
2Device complexity
If a circular laser shape is used for ignition, then the laser source is simple, but the energy transmission efficiency to the propellant is low
Solution Approach 1:
The patent modifies the spatial distribution parameter of laser energy by converting the circular beam profile into a linear profile using a Powell lens. This parameter change optimizes the energy distribution to match the hollow center geometry of the propellant, significantly improving energy transmission efficiency without complicating the laser source structure.
Solution Approach 2:
The patent applies local quality by concentrating laser energy specifically along the linear path of the hollow center of the propellant. The Powell lens creates a linear laser shape that precisely targets the ignitable regions within the hollow center, ensuring efficient energy utilization at the critical ignition zones.
3Device complexity
If energy is transmitted to only one point on the inner wall, then the laser beam path is simple, but the combustion uniformity is poor
Solution Approach 1:
The patent changes the spatial distribution parameter of the laser beam from a concentrated circular shape to an extended linear shape. This parameter change allows the laser energy to illuminate multiple points along the hollow center wall simultaneously, achieving uniform combustion while keeping the beam path relatively simple.
Solution Approach 2:
The patent effectively segments the ignition process by distributing laser energy along a linear path that contacts multiple segments of the hollow center wall. This segmentation approach ensures simultaneous ignition at multiple locations, resulting in uniform combustion throughout the propellant.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system achieves rapid and efficient ignition of the cylindrical propellant by ensuring uniform combustion across the entire propellant, reducing ignition time and enhancing energy efficiency.
Implementation Method 1
a laser shape conversion part including a Powell lens is mounted at a front of the laser diffusion part to change a circular shape of the laser received from the laser transfer part into a linear shape
Implementation Method 2
research for replacing a primer in a method of igniting an artillery propellant using a laser is being recently conducted
Implementation Method 3
a large-caliber artillery propellant mounted inside the gun barrel and formed with a center through hole to fire a shell
Implementation Method 4
a breech block coupled to a gun barrel to seal combustion gas generated by combustion
Implementation Method 5
a laser transmission part is mounted at a rear of the laser diffusion part to seal propellant combustion gas generated in the gun barrel while transmitting the converted laser received from the laser shape conversion part
Data Source
AI summary
The present invention relates to a laser ignition system for a large-caliber artillery, which provides a linear laser beam shape, and the ignition system of the present invention evenly combusts a cylindrical large-caliber artillery propellant with a hollow center in an energy-efficient manner using a laser in longitudinal and radial directions.