Velocity and turbulence measurements in a combustion chamber of S. I. engine under motored and firing operations by L. D. A. with fiber-optic pick-up

Conference · Thu Jan 01 00:00:00 EST 1987

OSTI ID:6513608

Obokata, T; Hanada, N; Kurabayashi, T

In order to improve adaptability of the laser Doppler anemometer (LDA) to measurement of gas flow velocities in an internal combustion engine, an optical fiber system composed of a couple of single mode, polarization-preserving optical fibers has been developed to transmit the incident beams. The overall light transmission efficiency of the system is 24% and not so high, but the system enables real-time measurements of gas flow velocity in the combustion chamber of a small two-cycle engine during firing operation. The velocity data measured are processed with cycle by cycle analysis by stationary time-averaged method to obtain bulk velocity, turbulence intensity and integral time scale of turbulence.

• Research Organization: College of Technology, Gunma Univ.
• OSTI ID: 6513608
• Report Number(s): CONF-870204-
• Resource Relation: Conference: Society of Automotive Engineers international congress and expo, Detroit, MI, USA, 23 Feb 1987; Other Information: 870166
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
ANEMOMETERS
FIBER OPTICS
COMBUSTION CHAMBERS
TURBULENT FLOW
VELOCITY
SPARK IGNITION ENGINES
IGNITION
OPERATION
BEAM DYNAMICS
DOPPLER EFFECT
FLOW RATE
GAS FLOW
LASERS
LIGHT TRANSMISSION
MEASURING METHODS
REAL TIME SYSTEMS
TIME DEPENDENCE
ENGINES
FLUID FLOW
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MEASURING INSTRUMENTS
330101* - Internal Combustion Engines- Spark-Ignition