Exhaust Valve Geometry and Its Effect on Gas Velocity and Turbulence in an Exhaust Port 830151
The influence of fluid flow phenomenon in the exhaust valve and port region on available energy at the turbine of a turbocharged diesel engine is discussed. Zones of high fluid shear, recirculation and vortex shedding all increase fluid entropy and heat transfer and reduce turbine available energy.
Detailed measurement of fluid velocity and turbulence intensity downstream of the exhaust valve have been made for six valve designs. The fluid flow characteristics are discussed and the influence of geometric design changes presented. Overall discharge coefficients are included.
The data will also be useful for validation of detailed fluid dynamic models of flow through valves.
Citation: Oldfield, S. and Watson, N., "Exhaust Valve Geometry and Its Effect on Gas Velocity and Turbulence in an Exhaust Port," SAE Technical Paper 830151, 1983, https://doi.org/10.4271/830151. Download Citation
Author(s):
S. G. Oldfield, N. Watson
Affiliated:
Atkins Research and Development, Epsom, England (Formerly of Imperial College, London), Imperial College of Science & Technology, London, England
Pages: 24
Event:
SAE International Congress and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Exhaust valves
Diesel / compression ignition engines
Heat transfer
Turbulence
Valves
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