Cycle-resolved LDV measurements in a motored diesel engine and comparison with K-. epsilon. model predictions

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5378255

ZurLoye, A O; Siebers, D L; McKinley, T L; Ng, H K; Primus, R J

Cycle-resolved LDV measurements of tangential mean velocities and turbulence intensities were made in a motored, single cylinder, Cummins NH diesel engine at 300 and 600 rpm. The measurements were made at eight locations in a plane 0.9 cm below the cylinder head. The combustion chamber and intake configuration of this low-swirl, low-squish engine were nearly identical to the stock configuration. For improved optical access, however, the compression ratio was lower in the test engine (10:1) than in the production engine (14.5:1). The measured turbulence intensities were compared to values computed with KIVA, an in-cylinder fluid dynamics flow code with a {kappa}-{epsilon} turbulence model. The measurements show that the mean velocity field is three-dimensional before TDC, consisting of both a weak swirling motion and a weak tumbling motion.

• OSTI ID: 5378255
• Report Number(s): CONF-890240--
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330102* -- Internal Combustion Engines-- Diesel
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
COMPUTER CODES
COMPUTERIZED SIMULATION
DIESEL ENGINES
ENGINES
FLOW MODELS
FLUID MECHANICS
HEAT ENGINES
HYDRAULICS
INTERNAL COMBUSTION ENGINES
K CODES
MATHEMATICAL MODELS
MECHANICS
SIMULATION
TURBULENCE
VELOCITY