Accession Number : AD0857637

Title :   An Experimental Study of Coaxial Turbulent Mixing of Liquid and Gaseous Fuel with Air.

Descriptive Note : Annual technical rept. no. 2, 15 Nov 67-15 Nov 68,

Corporate Author : MICHIGAN UNIV ANN ARBOR

Personal Author(s) : LaPointe, Clayton W.

Report Date : AUG 1969

Pagination or Media Count : 217

Abstract : The supersonic mixing of two-phase systems is investigated using a light scattering technique. It is shown that the liquid particle size distribution for sufficiently high Mach number is effectively monodisperse. From path-integrated measurements at two wavelengths in the IR region, the radial distribution of particle density is obtained by Abel inversion. It is shown that two distinct regions of the coaxial jets exhibit similarity behavior and that centerline density decay and mixing radii follow power law relations. It is also shown that centerline density may be obtained without Abel inversion. A non-interfering diagnostic system utilizing absorption spectroscopy and a tracer gas (HF) was also developed to study gas-gas axisymmetric mixing. Functions are developed for the interpretation of absorption data in terms of absorber density and temperature. (Author)

Descriptors :   *JET MIXING FLOW), (*SUPERSONIC COMBUSTION RAMJET ENGINES, NOZZLE GAS FLOW), (*SUPERSONIC COMBUSTION, TURBULENCE, PARTICLE SIZE, LIQUIDS, GASES, INFRARED SPECTROSCOPY, TRACER STUDIES, ABSORPTION SPECTRA, HYDROGEN COMPOUNDS, FLUORIDES.

Subject Categories : Fluid Mechanics
      Combustion and Ignition
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE