Thermal Response of Sapphire to Propellant Combustion

Abstract

Laser ignition is a relatively new approach to initiating the combustion of gun propellant. In this application, the laser pulse is transmitted into the combustion chamber through a window, typically made of sapphire, located in the breech face. In order to evaluate the long-term effects of propellant combustion on the laser window itself, it is important to know the window temperature during firing. This report presents temperature data on a sapphire sample located in the region of the laser window in a laser-ignited 155mm M199 cannon, firing various charge configurations.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1998
Accession Number
ADA344626

Entities

People

  • Mark Bundy

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Engineered Resilient Systems
  • Weapons Technologies

DTIC Thesaurus Topics

  • Chambers
  • Combustion
  • Combustion Chambers
  • Films
  • Heat Transfer
  • Ignition
  • Ignition Lag
  • Ignition Systems
  • Laser Ignition Systems
  • Laser Pulses
  • Materials
  • Military Research
  • Muzzle Velocity
  • Propellants
  • Radiation
  • Surface Temperature
  • Thin Films

Fields of Study

  • Physics

Readers

  • Optical Physics and Photonics.
  • Rocket Propulsion.
  • ballistics.

Technology Areas

  • Directed Energy