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Past Meeting

Prof Richard Stone - Looking inside the Jaguar 5 litre Petrol Engine

Single Cylinder Engine with Optical Access Have you ever wished you could look inside your engine while it was running?

This fascinating talk by leading Oxford University Professor of Engineering, Richard Stone, showed how its done.

Measurements have been taken using a single cylinder optical access engine at Oxford in collaborative research with Jaguar over the last 6 years.

As well as "combustion" videos, reference was also be made to the measurements of exhaust particulate matter - the subject of pending emissions legislation.

Richard Stone

Richard Stone Professor Richard Stone has been at Oxfords Department of Engineering Science since 1993, and is well known as the author of Introduction to Internal Combustion Engines, which was first published in 1985.

He is well known for his studies of combustion in spark ignition engines, which has included gasoline direct injection (GDI) engines, since 1999 and of particulate emissions since 2004.

He initiated a recently completed an EPSRC/Shell/Jaguar funded project on Combustion Concepts for Sustainable Premium Vehicles (CCSPV), which combined the work of UCL, Loughborough, Leeds and Oxford.

His work on combustion analysis and the completeness of combustion was awarded the IMechE Crompton Lanchester Medal.

Richard Stone collaborates with Prof Robert Raine (University of Auckland), Martin Davy (British Columbia) and David Buttsworth (University of Southern Queensland).

Planar Laser Induced Fluorescence (PLIF)

PLIF Images of Fuel Distribution
PLIF Images of Fuel Distribution
PLIF has been used for measuring fuel distribution, Mie scattering has been used for fuel spray measurements, and high speed video has been used for natural light photography and 3-colour pyrometry (to measure soot temperature and loading).

The key contribution from Oxford was developing a technique for the quantitative PLIF measurements of air-fuel ratio in a firing engine, using a multi-component fuel with co-evaporating tracers for the light, medium and heavy fractions. The fuel was specially formulated in collaboration with Shell.

See www.eng.ox.ac.uk/ice/ccspv.html for links to some videos, and publications on particulates, include number and mass distributions, and composition and morphology.

Further background

Mie Scattering Image of Fuel Injection fuel
Mie Scattering Image
of Fuel Injection
Fast response surface thermocouple measurements were used for the determination of instantaneous heat flux. Work continued using unsteady 2D analysis and impulse calibrations of the heat flux probes. Image analysis techniques were developed for flame front detection and analysis, and a "3-Colour" method devised for the determination of soot temperature and loading. This was then coupled with full bore optical access and crank-angle resolved images.

The laser diagnostics work depends on collaboration with Professor Paul Ewart of the Clarendon Laboratory in Oxford.

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