Energy Optimizing of High-Compression-Ratio Combustion Chambers

Format:

Conference/Event

Author/Creator:

Douaud, Douaud, author.

Conference Name:

20th FISITA Congress (1984), Vienna, Austria (1984-01-01 : Vienna, Austria)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1984

Summary:

A synthesis of the research undertaken at the Institut Francaisdu P\aetrole to understand phenomena of combustion, of heattransfers, and of knock and controlling to optimizehigh-compression-ratio combustion chambers has led to the proposingof two specific research topics: - calm chamber with dual ignition;turbulent chamber with squish effect.A calm chamber with a small surface-area/volume ratio enablesheat losses to be minimized because they penalize operatingefficiency all the more as the compression ratio is high. Dualignition combined with a geometry which maximizes the area of theflame front creates high energy discharge release rates which arefavorable for efficiency and knock prevention. The main limitationof dual ignition is the technico-economic constraint.Optimizing squish chambers requires a geometric design whichmakes a compromise on sufficiently high turbulence intensity tospeed up combustion without overly increasing heat transfers.The geometry must also enhance the development of a maximum-areaflame front, and the squish effect must amplify this area evenfurther. Building such a chamber depends on knowing the internalaerodynamics, the interactions between the geometry and the overallmovement of gases, and the turbulence

Notes:

Vendor supplied data

Publisher Number:

845006

Access Restriction:

Restricted for use by site license