Automotive - IC Engine Cylinder Flows

Flow processes inside the cylinder of reciprocating internal combustion engines are important to the automotive industry. GFS can handle moving meshes and thus simulate the flow inside the inlet ports and the engine cylinder with the movement of  valves and the piston. Turbulence can be modelled using a variety of models available; both RANS and LES calculations can be performed. Combination with spray models allow prediction of the fuel vapour distribution inside the engine cylinder for various nozzle designs and real multi-component fuels. Those are critical for emerging gasoline direct injection engines and HCCI combustion systems.

Examples of calculated cases are given below.

(click image for animation)

Diesel spray development inside the bowl of direct-injection diesel engine. The iso-surface plotted corresponds to equivalence ratio equal to one.

(click images for animation)

Fuel spray distribution and air-flow ribbons inside a multi-valve gasoline direct injection engine cylinder as seen from two different views. Droplets are coloured according to their temperature. Flow ribbons are colored according to air velocity component in the direction of piston movement.

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