1991-02-01

Numerical Simulation of Swirling Port-Valve-Cylinder Flow in Diesel Engines 910263

A CAD/CAE procedure has been used for the analysis of the flow in an intake port-valve-cylinder assembly of a DI Diesel engine. The flow was simulated for both, steady state conditions and transient motored situation during intake and compression strokes. The characteristics of the helical port are analyzed, for the steady state case, in terms flow rate, generation of angular momentum flux and induced in-cylinder flow motion. The results of the simulation were correlated with experimental results, consisting of oil film visualizations on valve and intake port surfaces, and of local velocity measurements in the cylinder. The transient flow simulation shows the different characteristics of the flow motion in cylinder and piston bowl during intake and compression strokes. It was observed that the swirl generating capacity of the valve is different between the valve opening and closing phases. Also, a strong interaction was found between the swirling motion and the shape and position of the piston bowl.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Sealing the High Performance Diesel Engine with Victocor 500

2003-01-0480

View Details

TECHNICAL PAPER

A Multi-disciplinary Approach for Evaluating Strength of Engine Cylinder Head and Crankcase Assembly under Thermo-Structural Loads

2009-01-0819

View Details

TECHNICAL PAPER

The Relationship of a Gasket’s Physical Properties to the Sealing Phenomenon

650431

View Details

X