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Numerically Modeling the Dynamics of a Piston-Mounted Passive Inlet Poppet Valve
Technical Paper
2007-32-0099
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English
Abstract
A 2D axissymmetric CFD model of a prototype free-piston engine has been developed using a commercial code. The dynamics of a passive inlet valve mounted on the moving piston was the main interest in the investigation. Preliminary results of cylinder and compressor pressure show good agreement with experimental pressure data for both fired and motoring conditions. Insight into the probable lift characteristics of the passive inlet valve was obtained. The CFD model achieves the simulation of complex multi-body movement through structured mesh deformation. Momentum source terms are utilized to modify flow in certain domains in the model. The paper reports the difficulty of specifying appropriate loss terms for a 2D model of 3D flow. It concludes by assessing the suitability of simplified 2D CFD to model gas dynamics. In cases where the flow departs significantly from a 2D form, either 3D CFD or 1D gas dynamics is probably a better choice.
Authors
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Citation
GIBBES, G. and HONG, G., "Numerically Modeling the Dynamics of a Piston-Mounted Passive Inlet Poppet Valve," SAE Technical Paper 2007-32-0099, 2007.Also In
References
- Goldsborough, S. S. Van Blarigan, P. “A Numerical Study of a Free Piston IC Engine Operating on Homogeneous Charge Compression Ignition Combustion” SAE Paper 1999-01-0619 1999
- Carter, D. Wechner, E. “The Free Piston Power Pack: Sustainable Power for Hybrid Electric Vehicles” SAE Paper 2003-01-3277 2003
- Kleemann, A. P. Dabadie, J.-C. Henriot, S. “Computational Design Studies for a High-Efficiency and Low-Emissions Free Piston Engine Prototype” SAE Paper 2004-01-2928 2004
- Pohl, S. E. Graf, M. “Dynamic Simulation of a Free-Piston Linear Alternator in Modelica” 4th International Modelica Conference 2005
- Fredriksson, J. L. Bergman, M. Golovitchev, V. Denbratt, I. G. “Modeling the Effect of Injection Schedule Change on Free Piston Engine Operation” SAE Paper 2006-01-0449 2006
- Zeng, Y. “Modelling of Scavenging and Plugging in a Twin-Cylinder, Two-Stroke Engine Using Cfd” SAE Paper 2003-32-0020 2003
- Zeng, Y. Strauss, S. Lucier, P. E. Craft, T. “Predicting and Optimizing Two-Stroke Engine Performance Using Multidimensional Cfd” SAE Paper 2004-32-0039 2004
- Fyhr, C. Dahlberg, O. “Complete Engine Modelling Using Cfd” SAE Paper 2004-01-0109 2004
- www.freepistonpower.com 2007
- Roth, K. Sobiesiak, A. Robertson, L. A. Yates, S. “In-Cylinder Pressure Measurements With Optical Fiber and Piezoelectric Pressure Transducers” SAE Paper 2002-01-0745 2002
- Blair, G. P. “An Alternative Method for the Prediction of Unsteady Gas Flow Through the Internal Combustion Engine” SAE Paper 911850 1991