On the Turbulent Flow Downstream of a Partly Opened Throttle Valve

Experimental measurements were performed in a model inlet pipe on the turbulent flow downstream of the throttle valve of a commercial motorcycle carburettor. The inlet pipe was made of a section of straight plexiglass tube to facilitate the access of hot-wire and pressure probes. Continuous dry air...

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Bibliographic Details
Published in:Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science Part C: Journal of Mechanical Engineering Science, 1994-07, Vol.208 (4), p.213-222
Main Authors: Hu, T-F, Hsu, Y-Y
Format: Article
Language:English
Subjects:
Aerodynamics
Angular velocity
Carburetors
Computational fluid dynamics
Jet streams (meteorology)
Planes
Pressure sensors
Throttles
Turbulence
Turbulent boundary layer
Turbulent flow
Velocity distribution
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Summary:Experimental measurements were performed in a model inlet pipe on the turbulent flow downstream of the throttle valve of a commercial motorcycle carburettor. The inlet pipe was made of a section of straight plexiglass tube to facilitate the access of hot-wire and pressure probes. Continuous dry air was drawn into the model to establish the flow. The flow downstream of the partly opened throttle valve is found composed of a recirculation region, a three-dimensional jet stream and a wall boundary layer. Complex turbulent flow interactions among the recirculation region, the jet stream and the boundary layer are observed. This study clearly demonstrates that the jet stream, which includes a major portion of the flow going downstream, shows similarity of axial velocity profiles on planes normal to the angular direction.
ISSN:0954-4062
2041-2983
DOI:10.1243/PIME_PROC_1994_208_122_02