Objective THE BENEFITS TO BE REALISED BY THE DEVELOPMENT OF THE COMPUTER CODE ARE THE DESIGN OF MORE EFFICIENT COMBUSTION UNITS HENCE IMPROVED FUEL ECONOMY, REDUCED EXHAUST EMISSIONS AND INCREASED COMPETITIVENESS OF EUROPEAN MANUFACTURERS. A computational fluid dynamics code called SPEED has been developed to simulate the 30 in cylinder flow field and turbulence in arbitrarily shaped combustion chambers. It will operate successfully with nonorthogonal, unstructured and locally refined meshes, allowing accurate definition of any chamber geometry. Its main restriction is the limited availability of automatic mesh movement routinesto aid successful manipulation of complex meshes through a full simulation cycle. A well developed preprocessing and postprocessing environment is available. The code has undergone extensive testing on a wide range of geometries during its development. The project has now provided combustion engineers with an important design aid to increase understanding, and improve optimisation, of the flow processes in reciprocating engines. Design and development programmes will become faster and more cost effective, with the resultant combustion systems giving further improvements in fuel economy and exhaust emission reduction.A computational fluid dynamics code called SPEED has been developed to simulate the 30 in cylinder flow field and turbulence in arbitrarily shaped combustion chambers. It will operate successfully with nonorthogonal, unstructured and locally refined meshes, allowing accurate definition of any chamber geometry. Its main restriction is the limited availability of automatic mesh movement routines to aid successful manipulation of complex meshes through a full simulation cycle. A well developed preprocessing and postprocessing environment is available. The code has undergone extensive testing on a wide range of geometries during its development. The project has now provided combustion engineers with an important design aid to increase understanding, and improve optimisation, of the flow processes in reciprocating engines. Design and development programmes will become faster and more cost effective, with the resultant combustion systems giving further improvements in fuel economy and exhaust emission reduction.THIS IS A PART OF A WIDER THEORETICAL STUDY OF THE BEHAVIOUR OF AIR FUEL MIXTURES IN COMBUSTION ENGINE CYLINDERS BOTH BEFORE AND DURING THE COMBUSTION PROCESS. THIS PARTICULAR PART DEALS ONLY WITH THE BEHAVIOUR OF THE GASEOUS CHARGE BEFORE FIRING (COLD FLOW) AND AIMS TO PRODUCE A THREE DIMENSIONAL COMPUTER MODEL OF FLOW AND TURBULENCE IN THE CYLINDER. THE FIRST PHASE OF THE WORK HAS ALREADY PRODUCED SUCH A MODEL FOR A LIMITED RANGE OF COMBUSTION CHAMBER SHAPES AND PHASE 2 WILL EXTEND THIS TO SIMULATE THE FLOW INSIDE A MUCH WIDER RANGE OF CHAMBER GEOMETRIES. COMBUSTION CHAMBER DESIGN IS CRITICALLY IMPORTANT TO FUEL ECONOMY, EXHAUST EMISSIONS AND POWER OUTPUT BUT HITHERTO DEVELOPMENT HAS BEEN ALMOST ENTIRELY EXPERIMENTAL AND THEREFORE LONG AND COSTLY. AN IMPORTANT PART OF THE PRESENT PROJECT WILL BE TO TEST AND EVALUATE THE THEORETICAL PREDICTIONS AGAINST EXPERIMENTAL DATA. THE LATTER WILL BE OBTAINED BY LASER DOPPLER ANEMOMETRY USING AN EXTERNALLY MOTORED PLEXIGLASS ENGINE TO ALLOW OPTICAL ACCESS TO THE COMBUSTION CHAMBER. THE WORK WILL INVOLVE NOT ONLY THE DEVELOPMENT OF SUITABLE COMPUTER PROGRAMMES BUT ALSO THE PREPARATION OF APPROPRIATE INPUT, OUTPUT AND GRAPHICS MODULES. THE INTENTION IS TO PRESENT A FINAL COMPUTER PACKAGE WHICH CAN BE USED FOR COMBUSTION CHAMBER ANALYSIS AND DEVELOPMENT BY DESIGN ENGINEERS WHO ARE NOT THEMSELVES COMPUTER SPECIALISTS. Fields of science natural sciencesphysical sciencesclassical mechanicsfluid mechanicsfluid dynamicscomputational fluid dynamicsnatural sciencesmathematicspure mathematicsgeometryengineering and technologyenvironmental engineeringenergy and fuelsnatural sciencesphysical sciencesopticslaser physics Programme(s) FP1-ENNONUC 3C - Research and development programme (EEC) in the field of Non-Nuclear Energy, 1985-1988 Topic(s) Data not available Call for proposal Data not available Funding Scheme CSC - Cost-sharing contracts Coordinator Rover Group plc EU contribution No data Address Gaydon Test Centre Banbury Road Lighthorne CV35 0BL Warwick United Kingdom See on map Total cost No data Participants (6) Sort alphabetically Sort by EU Contribution Expand all Collapse all Fiat Italy EU contribution No data Address See on map Total cost No data IMPERIAL COLLEGE OF SCIENCE, TECHNOLOGY AND MEDICINE United Kingdom EU contribution No data Address South Kensington Campus LONDON See on map Total cost No data Peugeot SA France EU contribution No data Address See on map Total cost No data RNRU France EU contribution No data Address See on map Total cost No data VOLKSWAGEN AG Germany EU contribution No data Address 38440 WOLFSBURG See on map Links Website Opens in new window Total cost No data Volvo Sweden EU contribution No data Address See on map Total cost No data