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1 2000

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In-cylinder and in-manifold Laser-Doppler velocimetry on a motored production-type SI engine

Van den Heuve S. L., Somers L. M. T., Baert R. S. G.

Journal of KONES

2000

Vol. 7, No. 1-2

147-158

In-cylinder and in-manifold Laser-Doppler velocimetry (LDV) has been conducted on a motored production-type spark-ignition engine. Ań oil-lubricated optically-accessible engine was designed employing a piston-based window which allows for back-scattering LDY. Titanium-dioxide seeding was successfully applied because the common problems with the formation of particle agglomerates could be prevented. Reliable velocity data can be collected during several consecutive hours without window cleaning. Much insight into the temporal and spatial flow structures could already be gained from a relatively small number of measurements. The observed flow structures are clearly not straightforward.