Accession Number : ADD014027

Title :   Axial-Flow Aerodynamic Window for High Energy Laser.

Descriptive Note : Patent, filed 6 Mar 87, patented 11 Oct 88,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Stephens, Timothy

Report Date : 11 Oct 1987

Pagination or Media Count : 6

Abstract : The aerodynamic window of the present invention provides a barrier between two different environments of a high energy laser device. The first environment is a transverse gas flow across the laser beam and the third environment is an axial flow beam path. The window have a second environment therein changes both the gas temperature and the gas pressure along the laser beam to minimize optical path differences between the first and third environments. The second environment has a thermal transition section and an injection section. In the thermal transition section before the injection section, a gas manifold provides a varying gas flow field. The thermal transition section changes the gas temperature while maintaining its pressure and velocity constant. A transverse flow is exhausted in a location opposite to the gas manifold. The axial flow enters into the injection section. Gas ejectors in the injection section mix the axial flowing gas and increase the gas pressure velocity. Patents. (mjm)

Descriptors :   *AXIAL FLOW, *GAS FLOW, *HIGH ENERGY, *LASER BEAMS, *LASERS, *PATENTS, AERODYNAMICS, EJECTORS, ENVIRONMENTS, FLOW, FLOW FIELDS, GASES, INJECTION, MANIFOLDS(ENGINES), OPTICS, PATHS, PRESSURE, TEMPERATURE, THERMAL PROPERTIES, TRANSITIONS, TRANSVERSE, VELOCITY, WINDOWS

Subject Categories : Electrical and Electronic Equipment
      Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE