Numerical prediction to study the effect of pentroof chamber on the induction swirl intensity

الملخص EN

This paper describes a new method for estimating the induction swirl intensity by means of the numerical simulation of gas flow in the intake port and cylinder to optimize combustion chamber Design.

The optimization procedure adopted in the present investigation is based on GENERIC ALGORITHIMS and allows different fitness functions to be simultaneously maximized.

The parameters to be optimized are related to geometric feature shape of the combustion chamber.

The evaluation phase of GENERIC ALGORITHIMS was performed by simultaneity behavior of each design with modified version of FLUENT code 6.2.

The present work represents direct injection spark ignition engine with different combustion chamber design to get optimum swirl ratio with different engine speed.

The study of the chamber angle variation is to show the change in air jet value around inlet valves and then design optimum angle which gets uniform annular jet around each intake valve to give as a result high swirl ratio.

Good results are obtained at engine speed 2500 rpm with pent roof angle 15º for both sides.

These results give good agreement with experimental result by Ref [1], where he used single inlet valve chamber.