1983-02-01

Characterization of Flow Produced by a High-Swirl Inlet Port 830266

The flow produced by an experimental high-swirl intake port was studied by several techniques. These included measurements of flow rate and swirl as a function of valve lift on a steady state bench rig, hot-wire measurements of flow issuing from the valve, and flow visualization in water and air. By applying these techniques together to a single port, a body of data was generated which is presented as an addition to what is known about intake port flows and swirl generation. Data include flow and swirl coefficients, information on the effects of valve offset and port orientation angle, swirl generation by velocity non-uniformity around the valve, swirl decay in the rig due to air friction on the walls, and forward/backward flow coefficients. The definition of the appropriate dimensionless parameters for port flow characterization is also discussed.

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