An experimental study on the characteristics of the swirl ratio distribution with an intake port geometry

Title & Authors
An experimental study on the characteristics of the swirl ratio distribution with an intake port geometry
Lee, Ji-Geun; Ju, Bong-Cheol; No, Byeong-Jun; Gang, Sin-Jae;

Abstract
The effect of helical intake port geometry on in-cylinder swirl flow characteristics was studied. Two helical intake ports were selected to change swirl ratio, mean flow coefficient with the variation of valve lifts, valve eccentricity ratios and axial distance. The measurements were made by using an impulse swirl meter. The port B modified to increase the swirl ratio( $\small{R_{s}}$) had the tendency of the increased non-dimensional rig swirl ( $\small{N_{r}}$) distribution in comparison with that of the port A. And the $\small{N_{r}}$ distribution was remarkably improved at low valve lifts. The modification of the geometry to increase the swirl ratio ( $\small{R_{s}}$) in helical intake port resulted in the decrease of the mean flow coefficient ( $\small{C_{f(mean)}}$) regardless of valve eccentricity ratio ( $\small{N_{y}}$). And also non-dimensional rig swirl ( $\small{N_{r}}$) in the high valve lift affected the calculation of swirl ratio considerably.onsiderably.
Keywords
Helical Intake Port;Valve Eccentricity Ratio;Non-Dimensional Rig Swirl;Swirl Ratio;Flow Coefficient;ISM;Impulse Swirl Meter;
Language
Korean
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