Flow Structure and Mixing in a Motored Axisymmetric Engine 890321

Observations of the in-cylinder flow field have been made using a smoke flow visualization technique in a transparent cylinder axisymmetric motored engine. The engine incorporates variable valve timing and variable swirl hardware. The visualization system utilizes a copper vapor laser, 16mm high speed camera and titanium dioxide smoke.
Three intake valve lift profile shapes were studied at 500 and 1000 RPM with and without swirl. Observed flow patterns change rapidly near TDC. Axial stratification is produced with swirl during intake but is destroyed during compression. A valve curve was found which accelerates in-cylinder mixing relative to a standard curve.


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


Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.