Accession Number : AD0745540

Title :   An Investigation of the Detection of Charged Metal Particles in a Jet Engine Exhaust by a Cylindrical Electrostatic Probe.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s) : Burgess,Ray W. , Jr

Report Date : JUN 1972

Pagination or Media Count : 88

Abstract : Charged particle detection by an electrostatic probe in a jet engine is studied from both a theoretical and an experimental approach. The charging mechanisms for a metal particle in a jet engine exhaust are presented and discussed. A theory for the waveshape expected for a charged metal particle moving perpendicular to a cylindrical electrostatic probe is developed. The theory is developed using an electronic circuit equivalent to the physical mechanisms in the jet engine. A laboratory burner is described which simulates the exhaust ion number density and lower thrust values of a jet engine. Experimental data are presented for the burner and for a scaled up system which uses a 0.44 cm diameter particle, a 7.6 cm diameter probe, and a 30 cm/sec velocity. (Author)

Descriptors :   (*JET ENGINES, EXHAUST GASES), (*EXHAUST GASES, CHARGED PARTICLES), PROBES(ELECTROMAGNETIC), ELECTROSTATICS, COMPUTER PROGRAMS, DETECTION, FAILURE(MECHANICS), THESES

Subject Categories : Combustion and Ignition
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE