The flow field in the exhaust port at laboratory conditions has
been described by Wang et al. [15] and this study has been extended
to pulsatile flow conditions by Semlitsch et al. [16]. However, in
contrast to these previous studies, the present analysis treats
engine-like hot conditions. Two cases with a mass flow rate and
a total pressure inflow boundary condition have been computed
at a fixed valve lift, where the values for the total pressure and
the mass flow rate have been obtained from the moving piston
moving valve case, when a valve lift of 5 mm is reached. The fixed
valve lift of 5 mm corresponds to a non-dimensional valve lift
Lv=Dv of 0:12, which falls in the first exhaust port flow regime
defined by Annand and Row [13]. Hence, the flow at this low valve
lift is expected to be confined to a conical jet through the narrow
valve gap.