Turbulent flow field in homogeneous-charge, spark-ignition engines

Conference · Thu Jan 01 04:00:00 EST 1981 · Symp. (Int.) Combust., (Proc.); (United States)

OSTI ID:5151043

Ramos, J I; Sirignano, W A

A two-dimensional, axisymmetric, turbulent, time-dependent simualtion of the four-strokes of a homogeneous-charge, spark-ignition engine has been performed. The turbulent flow field is solved by means of a modified version of the k/sub e/psilon/ model of turbulence which introduces the compressibility effects in the Reynolds stresses. The valve is simulated as an infinitely thin plate and moves inside the cylinder in a specified manner. The spark plug is represented as a heat source and is located at the centerline and cylinder head. One-step, irreversible chemical reaction obeying a mean Arrhenius Kinetics Law has been considered. During the intake stroke, a high-speed jet strikes the valve and is radially deflected along the cylinder wall forming a recirculation zone with almost uniform axial velocity behind the valve. Turbulence energy is generated at the shear layers of the incoming jet. 25 refs.

• Research Organization: Carnegie-Mellon Univ, Pittsburgh, Pa
• OSTI ID: 5151043
• Report Number(s): CONF-800809-
• Conference Information: Journal Name: Symp. (Int.) Combust., (Proc.); (United States)
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330101* -- Internal Combustion Engines-- Spark-Ignition
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
AUTOMOBILES
BOUNDARY CONDITIONS
CHEMICAL REACTIONS
COMBUSTION
COMBUSTION CHAMBERS
ENGINES
FLUID FLOW
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
OXIDATION
SPARK IGNITION ENGINES
THERMOCHEMICAL PROCESSES
TURBULENT FLOW
VEHICLES