This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Modelling and Simulation of Wankel Engine Flow Fields
Annotation ability available
Sector:
Language:
English
Abstract
The meaningfulness of numerical studies on Wankel engine flow fields depends strongly on turbulence modelling and the numerical methods used to obtain solutions. This investigation examined two different turbulence models and several variations of a numerical method for calculating turbulent flow fields inside one of the combustion chambers of a motored, two-dimensional Wankel engine. The two turbulence models examined were the standard k-ε model with wall functions and the low Reynolds number k-ε model of Chen and Patel. The numerical method used in this investigation was the approximate-factorization method of the ADI type with upwind differencing of the convection terms based on flux-vector splitting. Four variations of this method were investigated and they are first-order upwind differencing, second-order upwind differencing, first-order upwind differencing with Newton-Raphson iteration at each time step, and second-order upwind differencing with Newton-Raphson iteration at each time step. Iteration was used to minimize numerical errors arising from approximate-factorization and time-linearization. Results are presented which show the predicted velocity vector fields, contours of the turbulent kinetic energy and its dissipation rate, and average pressure and temperature of the gas within one combustion chamber of a motored, two-dimensional Wankel engine.
Recommended Content
Authors
Citation
Li, Z., Steinthorsson, E., Shih, T., and Nguyen, H., "Modelling and Simulation of Wankel Engine Flow Fields," SAE Technical Paper 900029, 1990, https://doi.org/10.4271/900029.Also In
References
- Yamamoto, K. Rotary Engine Sankaido Co., Ltd. Tokyo 1981
- Mount, R.E. Greiner, W.L. “High Performance, Stratified Charge Rotary Engines for General Aviation,” AIAA Paper 86-1553 1986
- Schock, H.J. Willis, E.A. Lee, C.-M. “Stratified-Charge Rotary Engine (SCRE) Program at NASA Lewis Research Center,” SAE Paper No. 870407 1987
- Hicks, Y.R. Schock, H.J. Craig, J.E. Umstatter, H.L. Lee, D.Y. “Visualization of Flows in a Motored Rotary Combustion Engine Using Holographic Interferometry,” AIAA Paper 86-1557 1986
- Hicks, Y.R. Chun, K. Schock, H.J. “Visualization of Air Flow in a Rotary Engine Assembly,” Lewis Research Center Cleveland, Ohio 1988
- Dimpelfeld, P.M. Witze, P.O. “Velocity Measurements in a 5.8 Liter Stratified-Charge Rotary Engine,” Sandia Report No. SAND87-8990 1988
- Hamady, F. Kosterman, J. Chouinard, E. Somerton, C. Schock, H. Chun, K. Hicks, Y. “Stratified Charge Rotary Engine Internal Flow Studies at the MSU Engine Research Laboratory,” SAE Paper 890331 1989
- Grasso, F. Wey, M.-J. Bracco, F.V. Abraham, J. “Three-Dimensional Computations of Flows in a Stratified-Charge Rotary Engine,” SAE Paper 870409 1987
- Abraham, J. Wey, M.-J. Bracco, F.V. “Pressure Non-Uniformity and Mixing Characteristics in Stratified-Charge Rotary Engine Combustion,” SAE Paper 880624 1988
- Shih, T.I-P. Yang, S.-L. Schock, H.J. “A Two-Dimensional Numerical Study of the Flow Inside the Combustion Chamber of a Motored Rotary Engine,” SAE Paper No. 860615 1986
- Shih, T.I-P. Nguyen, H.L. Stegeman, J. “Fluid Flow and Fuel-Air Mixing in a Motored Two-Dimensional Wankel Rotary Engine,” AIAA Paper No. 86-1556 1986
- Shih, T. I-P. Schock, H.J. Ramos, J.I. “Fuel-Air Mixing and Combustion in a Two-Dimensional Wankel Engine,” SAE Paper No. 870408 1987
- Shih, T. I-P. Schock, H.J. Nguyen, H.L. Stegeman, J. “Numerical Simulation of the Flowfield in a Motored Two-Dimensional Wankel Engine,” Journal of Propulsion and Power 3 1987 269 276
- Ramos, J.I. Shih, T.I-P. Schock, H.J. “Wankel Engine Modelling,” Proceedings of the XIX'th International Symposium on Heat and Mass Transfer in Gasoline and Diesel Engines Hemisphere Publishing Corp. Washington, D.C. 1987
- Steinthorsson, E. Shih, T.I-P. Schock, H.J. “Calculations of the Unsteady, Three-Dimensional Flow Field inside a Motored Wankel Engine,” SAE Paper 880625 1988 SAE Transactions 1988
- Launder, B.E. Spalding, D.B. “The Numerical Computation of Turbulent Flows,” Computer Methods in Applied Mechanics and Engineering 3 1974 269 289
- Shih, T.I-P. “Mathematical Models for the Numerical Study of Turbulent Flows,” Journal of the Chinese Institute of Engineers 11 1988 121 136
- Chen, H.C. Patel, V.C. “Near-Wall Turbulence Models for Complex Flows Including Separation,” AIAA Journal 26 1988 641 648
- Morel, T. Mansour, N.N. “Modeling of Turbulence in internal Combustion Engines,” SAE Paper No. 820040 1982
- Leschziner, M.A. Rodi, W. “Calculation of Annular and Twin Parallel Jets Using Various Discretization Schemes and Turbulence-Model Variations,” ASME Journal of Fluids Engineering 103 1981 352 360
- Launder, B.E. Sharma, B.I. “Application of the Energy-Dissipation Model of Turbulence to the Calculation of Flow near a Spinning Disk,” Letters in Heat and Mass Transfer 1 1974 131 138
- Hanjalic, K. Launder, B.E. “Sensitizing the Dissipation Equation to Irrotational Strains,” ASME Journal of Fluids Engineering 102 1980 456 461
- Patel, V.C. Rodi, W. Scheuerer, G. “Turbulence Models for Near-Wall and Low Reynolds Number Flows: A Review,” AIAA Journal 23 1985 1308 1319
- Mansour, N.N. Kim, J. Moin, P. “Near-Wall k- ε Turbulence Modelling,” AIAA Journal 27 1989 1068 1073
- Wolfshtein, M. “The Velocity and Temperature Distribution in One-Dimensional Flow with Turbulence Augmentation and Pressure Gradient,” International Journal of Heat and Mass Transfer 12 1969 301 318
- Jameson, A. Turkel, E. “Implicit Schemes and LU Decompositions,” Mathematics of Computations 37 1981 385 397
- Steinthorsson, E. Li, Z. Shih, T. I-P. “Numerical Simulation of the Three-Dimensional Turbulent Flow Field in a Wankel Engine,” Journal of Propulsion and Power
- Yang, S.L. Shih, T. I-P. “An Algebraic Grid Generation Technique for Time-Varying Two-Dimensional Spatial Domains,” International Journal for Numerical Methods in Fluids 6 1986 291 304