Accession Number : ADA181951

Title :   Coupling between Radiation and Gas Dynamics.

Descriptive Note : Annual rept. 1 Dec 85-1 Feb 87,

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Merkle,Charles L

PDF Url : ADA181951

Report Date : 31 Mar 1987

Pagination or Media Count : 38

Abstract : Direct heat addition of flowing gases by radiation absorption is considered. In the Infrared regime, the coupling between a laser beam ad a flowing gas is being modeled numerically. Implicit time iterative procedures originally developed for transonic flows are being adapted to the low Mach number, low Reynolds number regimes of interest. Two dimensional solutions show that absorption plasmas can exist over a wide range of flow speeds and that buoyancy can be a dominant factor when the forced convection velocity is small. In the microwave regime, an experimental investigation of various absorption modes is underway. An overview of the experimental design and initial experimental results is presented. Numerical predictions of the resonant cavity and propagating plasma modes of microwave absorption are also discussed. Keywords: Laser gas dynamic interaction; microwave heating of gases; Beamed energy; Advanced propulsion.

Descriptors :   *HEAT TRANSFER, *AEROTHERMODYNAMICS, ABSORPTION, PROPULSION SYSTEMS, GAS FLOW, GAS DYNAMICS, LASER BEAMS, MACH NUMBER, PLASMAS(PHYSICS), VELOCITY, CONVECTION, INFRARED RADIATION, INTERACTIONS, LASERS, LOW RATE, REYNOLDS NUMBER, INFRARED RADIATION, MICROWAVE FREQUENCY, PROPAGATION, CAVITIES, RESONANCE, TRANSONIC FLOW, RANGE(EXTREMES), GASES, HEATING, MICROWAVES, MATHEMATICAL PREDICTION, ITERATIONS, SOLUTIONS(GENERAL), TWO DIMENSIONAL

Subject Categories : Thermodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE