Direct measurement of the turbulent burning velocity in a homogeneous-charge engine

Conference · Wed Jan 01 04:00:00 EST 1986

OSTI ID:6875506

Witze, P O; Lopes, J M.C.M.

An experiment is described for the direct measurement of the turbulent burning velocity during premixed combustion in a spark ignition engine. The gas velocity is measured using a high data rate laser Doppler velocimeter system that resolves the unburned gas motion on an individual cycle basis. The ensemble-averaged flame speed is determined from ionization probe measurements of the time of flame arrival at discrete positions along the path of flame propagation. The difference between the cycle-resolved unburned gas velocity and the ensemble-averaged flame speed gives a direct measurement of the turbulent burning velocity that is unbiased by cycle variations in the combustion rate.

• Research Organization: Sandia National Labs., Livermore, CA
• OSTI ID: 6875506
• Report Number(s): CONF-861041-
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330101* -- Internal Combustion Engines-- Spark-Ignition
BENCH-SCALE EXPERIMENTS
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
DOPPLER EFFECT
ENGINES
EXHAUST GASES
FLAME PROPAGATION
FLUIDS
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
IONIZATION
KINETICS
MEASURING INSTRUMENTS
MEASURING METHODS
PROBES
REACTION KINETICS
SPARK IGNITION ENGINES
TURBULENCE
VELOCIMETERS
VELOCITY
WASTES