Abstract
Due to its positive effect on flame propagation in the case of a well-defined breakdown, the formation of a large-scale tumble motion is an important goal in engine development. Cycle-to-cycle variations (CCV) in the tumble position and strength however lead to a fluctuating tumble breakdown in space and time and therefore to combustion variations, indicated by CCV of the peak pressure. This work aims at a detailed investigation of the large-scale tumble motion and its interaction with the piston boundary layer during the intake stroke in a state-of-the-art gasoline engine. To allow the validation of the flow near the piston surface obtained by simulation, a new measurement technique called “Flying PIV” is applied. A detailed comparison between experimental and simulation results is carried out as well as an analysis of the obtained flow field. The large-scale tumble motion is investigated based on numerical data of multiple highly resolved intake strokes obtained using scale-resolving simulations. A method to detect the tumble center position within a 3D flow field, as an extension of previously developed 2D and 3D algorithms, is presented and applied. It is then used to investigate the phase-averaged tumble structure, its characteristics in terms of angular velocity and the CCV between the individual intake strokes. Finally, an analysis is presented of the piston boundary layer and how it is influenced by the tumble motion during the final phase of the intake stroke.
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References
Fogleman, M., Lumley, J., Rempfer, D., Haworth, D.: Application of the proper orthogonal decomposition to datasets of internal combustion engine flows. J. Turbul. 5, N23 (2004)
Roudnitzky, S., Druault, P., Guibert, P.: Proper orthogonal decomposition of in-cylinder engine flow into mean component, coherent structures and random gaussian fluctuations. Journal of Turbulence, N70 (2006)
Böhm, B., di Mare, F., Dreizler, A.: Characterisation of cyclic variability in an optically accessible IC engine by means of phase-independent POD
Voisine, M., Thomas, L., Borée, J., Rey, P.: Spatio-temporal structure and cycle to cycle variations of an in-cylinder tumbling flow. Exp. Fluids 50, 1393–1407 (2010)
Cao, Y., Kaiser, E., Borée, J., Noack, B., Thomas, L., Guilain, S.: Cluster-based analysis of cycle-to-cycle variations: application to internal combustion engines. Exp. Fluids 55, 1–8 (2014)
Buhl, S., Hartmann, F., Hasse, C.: Identification of large-scale structure fluctuations in IC engines using POD-based conditional averaging. Oil Gas Sci. Technol. Rev. IFP Energ. Nouvelles 71, 1 (2016)
Borée, J., Maurel, S., Bazile, R.: Disruption of a compressed vortex. Phys. Fluids 14, 2543–2556 (2002)
Hasse, C., Sohm, V., Durst, B.: Detached eddy simulation of cyclic large scale fluctuations in a simplified engine setup. Int. J. Heat Fluid Flow 30, 32–43 (2009)
Wang, T., Liu, D., Tan, B., Wang, G., Peng, Z.: An investigation into in-cylinder tumble flow characteristics with variable valve lift in a gasoline engine. Flow Turbul. Combust. 94, 285–304 (2014)
Jainski, C., Lu, L., Dreizler, A., Sick, V.: High-speed micro particle image velocimetry studies of boundary-layer flows in a direct-injection engine. International Journal of Engineering Research, 247–259 (2013)
Hartmann, F., Buhl, S., Gleiß, F., Barth, P., Schild, M., Kaiser, S., Hasse, C.: Spatially resolved experimental and numerical investigation of the flow through the intake port of an IC engine. Oil Gas Sci. Technol. Rev. IFP Ener. Nouvelles 71, 2 (2016)
Schmitt, M., Frouzakis, C., Wright, Y., Tomboulides, A., Boulouchos, K.: Investigation of the unsteady wall heat transfer under engine relevant conditions using direct numerical simulation LES4ICE (2014)
Wilcox, D.: Turbulence modeling for CFD, 2nd edn. DCW Industries, Inc. (1994)
Schlichting, H., Gersten, K.: Boundary-layer theory. Springer Science & Business Media (2000)
Kawai, S., Larsson, J.: Wall-modeling in large eddy simulation: Length scales, grid resolution, and accuracy. Phys. Fluids 24 (2012)
Piomelli, U.: Wall-layer models for large-eddy simulations. Progress Aerosp. Sci. 44, 437–446 (2008)
Pope, S.: Turbulent flows, 1st edn. Cornell University (2000)
Fröhlich, J.: Large eddy simulation turbulenter Strömungen, 1st edn. B.G. Teubner (2006)
Spalart, P., Jou, W., Strelets, M., Allmaras, S.: Comments on the feasibility of LES for wings, and on a hybrid RANS/LES approach. Adv. DNS/LES 1, 4–8 (1997)
Köhler, M., Hess, D., Brücker, C.: Flying PIV measurements in a 4-valve IC engine water analogue to characterize the near wall flow evolution. Meas. Sci. Technol. 26, 125302 (2015)
Hasse, C., Sohm, V., Durst, B.: Numerical investigation of cyclic variations in gasoline engines using a hybrid URANS/LES modeling approach. Comput. Fluids 39, 25–48 (2010)
Freudenhammer, D., Baum, E., Peterson, B., Böhm, B., Jung, B., Grundmann, S.: Volumetric intake flow measurements of an IC engine using magnetic resonance velocimetry. Exp. Fluids 55, 1–18 (2014)
Freudenhammer, D., Peterson, B., Ding, C., Böhm, B., Grundmann, S.: The influence of cylinder head geometry variations on the volumetric intake flow captured by Magnetic Resonance Velocimetry, Technical Report 2015-01-1697 SAE Technical Paper (2015)
Raw, M.: Robustness of coupled algebraic multigrid for the Navier-Stokes equations. AIAA paper 96, 29 (1996)
Raithby, G., Schneider, G.: Numerical solution of problems in incompressible fluid flow: treatment of the velocity-pressure coupling. Numer. Heat Transf. Part A Appl. 2, 417–440 (1979)
Van Doormaal, J., Raithby, G.: Enhancement of the simple method for predicting incompressible fluid flow. Numer. Heat Transf. 7, 147–163 (1984)
Rhie, C., Chow, W.: Numerical study of the turbulent flow past an airfoil with trailing edge separation. AIAA J. 21, 1525–1532 (1983)
Hasse, C., Sohm, V., Wetzel, M., Durst, B.: Hybrid URANS/LES turbulence simulation of vortex shedding behind a triangular flameholder. Flow Turbul. Combust. 83, 1–20 (2009)
Menter, F., Egorov, Y.: The scale-adaptive simulation method for unsteady turbulent flow predictions. Part 1: Theory and model description. Flow Turbul. Combust., 113–138 (2010)
Rotta, J.: Turbulente strömungen. Göttinger Klassiker der Strömungsmechanik, Universitätsverlag Göttingen (2010)
Egorov, Y., Menter, F., Lechner, R., Cokljat, D.: The scale-adaptive simulation method for unsteady turbulent flow predictions. Part 2: Application to complex flows. Flow Turbulence and Combustion, 139–165 (2010)
Schaefer, P., Gampert, M., Goebbert, J., Wang, L., Peters, N.: Testing of model equations for the mean dissipation using Kolmogorov flows. Flow Turbulence and Combustion, 225–243 (2010)
Lucius, A., Brenner, G.: Unsteady CFD simulations of a pump in part load conditions using scale-adaptive simulation. International Journal of Heat and Fluid Flow, 1113–1118 (2010)
Menter, F.: Two-equation eddy-viscosity turbulence models for engineering applications. AIAA Journal, 1598–1605 (1994)
Wilcox, D.C.: Reassessment of the scale-determining equation for advanced turbulence models. AIAA J. 26, 1299–1310 (1988)
Esch, T., Menter, F.: Heat transfer predictions based on two-equation turbulence models with advanced wall treatment. Turbul. Heat Mass Transf. 4, 633–640 (2003)
Menter, F.R.: Zonal two equation k-turbulence models for aerodynamic flows. AIAA Paper 2906, 1993 (1993)
Bardina, J., Huang, P., Coakley, T.: Turbulence modeling validation. AIAA Paper 2121, 1997 (1997)
Menter, F., Kuntz, M., Langtry, R.: Ten years of industrial experience with the sst turbulence model. Turbul. Heat Mass Transfer 4 (2003)
Coleman, G., Garbaruk, A., Spalart, P.: Direct numerical simulation, theories and modelling of wall turbulence with a range of pressure gradients. Flow Turbul. Combust. 95, 261–276 (2015)
Ma, P.C., Ewan, T., Jainski, C., Lu, L., Dreizler, A., Sick, V., Ihme, M.: Development and analysis of wall models for internal combustion engine simulations using high-speed micro-PIV measurments. Flow Turbulence and Combustion, 1–27 (2016)
Davidson, L.: Using isotropic synthetic fluctuations as inlet boundary conditions for unsteady simulations. Adv. Appl. Fluid Mech. 1, 1–35 (2007)
Menter, F.: Practice Best: scale-resolving simulations in ANSYS CFD. Technical Report, ANSYS (2015)
Vermorel, O., Richard, S., Colin, O., Angelberger, C., Benkenida, A., Veynante, D.: Towards the understanding of cyclic variability in a spark ignited engine using multi-cycle LES. Combust. Flame 156, 1525–1541 (2009)
Liu, K., Haworth, D.: Development and assessment of POD for analysis of turbulent flow in piston engines. SAE Technical Paper, 01–0830 (2011)
Shekhawat, Y., Paltrinieri, S., Schiffmann, P., Haworth, D., Fontanesi, S., Reuss, D., Sick, V.: An experimental and simulation study of turbulent flow in a homogeneous-charge spark-ignition engine. In: LES for Internal Combustion Engine Flows [LES4ICE] - Rueil-Malmaison (2014)
Menter, F., Langtry, R., Völker, S.: Transition modelling for general purpose CFD codes. Flow Turbulence and Combustion, 277–303 (2006)
Langtry, R., Menter, F.: Correlation-based transition modeling for unstructured parallelized computational fluid dynamics codes. AIAA Journal, 2894–2906 (2009)
Graftieaux, L., Michard, M., Grosjean, N.: Combining PIV, POD and vortex identification algorithms for the study of unsteady turbulent swirling flows. Meas. Sci. Technol. 12, 1422 (2001)
Michard, M., Favelier, T.: Développement d’un critère d’identification de structures tourbillonnaires adapté aux mesures de vitesse par piv. In: 9ème Congrès Francophone de Vélocimétrie Laser, pp. 14–17
Gohlke, M., Beaudoin, J.-F., Amielh, M., Anselmet, F.: Thorough analysis of vortical structures in the flow around a yawed bluff body. Journal of Turbulence, N15 (2008)
Borée, J., Miles, P.C.: In-Cylinder Flow, p 2014. Wiley
Acknowledgments
For the numerical part, the authors kindly acknowledge the financial support from the FVV (Forschungsvereinigung Verbrennungskraftmaschinen) within the project ”BSZII” (project number 6011333). The authors also thank Dr. Wolfgang Bauer and Dr. Florian Menter (both ANSYS Germany) for the fruitful discussions. The simulations were performed on the national supercomputer Cray XC40 (Hornet) at the High Performance Computing Center Stuttgart (HLRS) under the grant number ICECCV/44054 based on licences sponsored by ANSYS Germany. The experimental part was funded by the DFG (Deutsche Forschungsgesellschaft) within the program BR 1494/20-1 and the support is gratefully acknowledged here. Professor Christoph Bruecker is currently BAE SYSTEMS Sir Richard Olver Chair in Aeronautical Engineering, City University London, whose support is gratefully acknowledged.
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Buhl, S., Gleiss, F., Köhler, M. et al. A Combined Numerical and Experimental Study of the 3D Tumble Structure and Piston Boundary Layer Development During the Intake Stroke of a Gasoline Engine. Flow Turbulence Combust 98, 579–600 (2017). https://doi.org/10.1007/s10494-016-9754-1
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DOI: https://doi.org/10.1007/s10494-016-9754-1