Flow field measurements in an optically accessible, direct-injection spray-guided internal combustion engine using high-speed PIV

Flow field measurements in an optically accessible, direct-injection spray-guided internal... High-speed particle image velocimetry has been applied to study the flow field of an optically accessible motored direct-injection spray-guided internal combustion engine. Based on recent improvements in all-solid-state diode-pumped laser- and CMOS camera-technology a large field of view (43 × 44 mm2) was achieved at 6 kHz resulting in a temporal resolution of 1° crank angle at 1,000 rpm. This allows the investigation of the temporal evolution of large-scale flow structures. The flow field was recorded during the latter half of the compression stroke for tumble flow conditions at 500, 1,000 and 2,000 rpm. An analysis of cycle-to-cycle variations has been performed from individual and ensemble-averaged cycles. The temporal evolution of the main vortex center and the kinetic energy shows a few individual cycles with strong variations from the mean caused by a substantially different flow regime. A quantification of cyclic variations using the kinetic energy is possible. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Flow field measurements in an optically accessible, direct-injection spray-guided internal combustion engine using high-speed PIV

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Publisher
Springer-Verlag
Copyright
Copyright © 2009 by Springer-Verlag
Subject
Engineering; Engineering Thermodynamics, Heat and Mass Transfer; Fluid- and Aerodynamics; Engineering Fluid Dynamics
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-009-0742-2
Publisher site
See Article on Publisher Site

Abstract

High-speed particle image velocimetry has been applied to study the flow field of an optically accessible motored direct-injection spray-guided internal combustion engine. Based on recent improvements in all-solid-state diode-pumped laser- and CMOS camera-technology a large field of view (43 × 44 mm2) was achieved at 6 kHz resulting in a temporal resolution of 1° crank angle at 1,000 rpm. This allows the investigation of the temporal evolution of large-scale flow structures. The flow field was recorded during the latter half of the compression stroke for tumble flow conditions at 500, 1,000 and 2,000 rpm. An analysis of cycle-to-cycle variations has been performed from individual and ensemble-averaged cycles. The temporal evolution of the main vortex center and the kinetic energy shows a few individual cycles with strong variations from the mean caused by a substantially different flow regime. A quantification of cyclic variations using the kinetic energy is possible.

Journal

Experiments in FluidsSpringer Journals

Published: Sep 16, 2009

References

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