Accession Number : ADD017722

Title :   Method and Apparatus for Active Control of Combustion Devices.

Descriptive Note : Patent, Filed 16 Aug 93, patented 4 Jul 95,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Wilson, Kenneth ; Schadow, Klaus ; Smith, Robert ; Gutmark, Ephraim

Report Date : 04 Jul 1995

Pagination or Media Count : 12

Abstract : An improved technique for the active control of various combustion devices. This improved technique employs a flame kernel pulse actuator which produces periodic flame kernels by a spark ignition of a stoichiometric air and fuel mixture upstream of the combustion chamber. The discrete flame kernels are convected in a duct of premixed fuel and air which produce discrete pressure oscillations due to the energy release as each discrete flame propagates. Because the source of the energy release is essentially a chemical reaction, the flame kernel pulse actuator is able to produce a substantial amount of energy release even at the high operating pressures which are often encountered in many operational environments. These pressure oscillations may be adjusted to suppress or augment any combustion induced pressure oscillations as well as act to modulate the mixing layer between the fuel and air, thus controlling the downstream combustion process. jg p.1

Descriptors :   *CONTROL, *COMBUSTION, *ACTUATORS, *FLAMES, *PATENTS, *SPARK IGNITION, LAYERS, ENERGY TRANSFER, MIXTURES, PULSES, CHEMICAL REACTIONS, DUCTS, COMBUSTION CHAMBERS, FUEL AIR RATIO, MIXING, COMBUSTION STABILITY, OSCILLATION, STOICHIOMETRY, VARIABLE PRESSURE

Subject Categories : Combustion and Ignition
      Inorganic Chemistry
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE