LDA measurement of turbulent flow in a motored and firing spark-ignition engine with a horizontal prechamber

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:5892965

Namekawa, S; Ryu, H; Asanuma, T

To make clear the influence of a torch jet flow on the combustion process, a laser Doppler anemometer (LDA) is used to measure the mean velocity and turbulence intensity in a spark ignition engine with an unscavenged prechamber connected to a main chamber by a torch nozzle of different area sizes. The test engine is operated at a constant speed of 16.7 rps (1000 rpm), a constant volumetric efficiency of 80 +- 2% and MBT for each torch nozzle ara under firing as well as motored conditions. The LDA system is a dual beam forward scatter type, and its signals are acquired quickly and stored in a memory through a frequency tracking system.

• OSTI ID: 5892965
• Report Number(s): CONF-8810120-
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330101* -- Internal Combustion Engines-- Spark-Ignition
440300 -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
ANEMOMETERS
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
DATA ACQUISITION SYSTEMS
ENGINES
FLUID FLOW
FUEL SYSTEMS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
KINETICS
MEASURING INSTRUMENTS
METERING
REACTION KINETICS
SPARK IGNITION ENGINES
TURBULENT FLOW