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Theoretical and Experimental Investigation of Knock Induced Surface Destruction
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Abstract
Engine knock causes severe damage to the surfaces of the combustion chamber in I.C. engines. Since the detailed damaging mechanisms are still unknown, we performed a theoretical and experimental study in order to identify potential erosion processes.
To circumvent the considerable cyclic variations of combustion in I.C. engines the experiments use an optically accessible bomb. It is shaped to resemble a typical geometry which is known to be particularly susceptible for knock damage. In this way we establish well defined conditions for knock simulations. By means of very high speed Schlieren diagnostics we measure the propagation speeds of detonation waves in the duct and use the data to estimate the wall loading due to instantaneous pressure peaks and sudden large temperature increases. Qualitative agreement between numerical simulations and experimental observations is achieved in the calculations. The surface damage generated in the simulator agrees well with knock induced surface erosion in real engines. The experimental data indicate that erosion may be caused by excessive surface stresses due to large local heat fluxes and/or by high peak pressures in positively interfering reflected shocks which are driven by the very rapid chemical heat release.
In the two-dimensional numerical simulations we consider shock induced combustion in an L-shaped duct. This idealized geometry represents the top-land region in a combustion chamber and resembles the experimental configuration. The results reveal an important role of the geometry in triggering the onset of detonation waves. The algorithm integrates the reactive Euler equations employing a higher order Godunov type scheme extended to cover the chemical source terms.
In the paper we describe in detail the theoretical model, the experimental set-up and results from erosion studies on aluminum alloys in the knock damage simulator.
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Citation
Maly, R., Klein, R., Peters, N., and Kðnig, G., "Theoretical and Experimental Investigation of Knock Induced Surface Destruction," SAE Technical Paper 900025, 1990, https://doi.org/10.4271/900025.Also In
References
- Adolph, N. Pischinger, F. Mechanismus der Klopf-schädigung in Ottomotoren und Möglichkeiten zuderen Vermeidung 1982
- Almgren, R.F. Thesis Dept. of Math., Princeton Univ., May 1989
- Clark, D. Transactions of the Faraday Society 8 1926
- Cuttler, D.H. Grigis, N.S. Photography of Combustion during Knocking Cycles in Disk and Compact Chambers SAE Paper, 880195 1988
- Curry, S. Effects of Antiknocks on Flame Propagation in a Spark Ignition Engine 9th Symposium on Combustion The Combustion Institute Pittsburgh 9 1056 1068 1963
- Downs, D. Wheeler, R.W. Recent Developments in Knock Research Proc. Aut. Div. Inst. Mech. Eng. 88 99 1951
- Einfeldt, B. On Godunov Type Methods for Gasdy-namics SIAM J. numer. Anal. 25 2 1988
- Enquist, B. Majda, AJ. Absorbing Boundary Conditions for the Numerical Simulation of Waves Math. Comp. 31 629 651 1977
- Fickett, W. Davis, W.C. Detonation University of California Press Berkeley 1979
- Fujiwara, T. Reddy, K.V. Propagation Mechanism of Detonation - Three Dimensional Phenomena 12th ICODERS Ann Arbor, Michigan 1989
- Godunov, S.K. Finite Difference Method for Numerical Computation of Discontinous Solutions of the Equations of Fluid Dynamics Mat. Sbornik 47 271 306 1959
- Harten, A. Lax, P.D. van Leer, B. On Upstream-Differencing and Godunov-Type Schemes for Hyperbolic Conservation Laws SIAM Review 25 35 61 1983
- Kapila, A.K. Dold, J.W. A Theoretical Picture of Shock to Detonation Transition in a Homogeneous Explosive Preprint 1989
- Kapila, A.K. Roytburt, V. Transition to Detonation; A Numerical Study Proc. of 3rd intl. Conf. on Numerical Combustion 1989
- Kirsch, L.J. Quinn, C.P. A Fundamentally based Model of Knock in the Gasoline Engine 16th Symposium (Intl.) on Combustion The Combustion Institute 16 233 242 1976
- Klein, R. Shock Initiated Ignition in an L-Shaped Duct; Two Aspects Of its Numerical Simulation Notes on Numerical Fluid Mechanics Deville M. Vieweg 20 138 145 1988
- Klein, R. Detonation Initiation due to Shock Wave-Boundary Interactions Notes on Numerical Fluid Mechanics Ballmann J. Jeltsch R. Vieweg 24 279 288 1988
- Klein, R. Stoβinduzierte Zündung und der Übergang zur Detonation in engen Spalten 1988
- Volkswagen AG Knocking of Combustion Engines Volkswagen AG Wolfsburg 1981
- König, G. Theoretische und experimentelle Untersuchung der Klopfschädigung durch Thermoschock 1987
- Lax, P.D. Wendroff, B. Systems of Conservation Laws Comm. Pure & Appl. Math 13 217 237 1960
- Lee, W. Schäfer, H.J. Analysis of Local Pressures, Surface Temperatures and Engine Damage under Knock SAE Paper, 830508 1983
- Lee, J.H. Knystatutas R. Guirao, C. Benedick, W.B. Hydrogen-Air Detonations Second Intern. Workshop on the Impact of Hydrogen on Water Reactor Safety Albuquerque, New Mex. 1982
- van Leer, B. Towards the Ultimate Conservative Differencing Scheme V: A Second Order Sequel to Godunov's Method J. Comp. Phys. 32 101 136
- Leppard, W.R. The Autoignition Chemistry of Isobutane; A Motored Engine Study SAE Paper, 881606 1988
- Lewis, B. van Elbe, G. Combustion, Flames and Explosions of Gases Academic Press New York 1951
- Lutz, A.E. A Numerical Study of Thermal Ignition Sandia Rep. SAND88-8224, UC-4 1988
- Maas, U. Detailed Numerical Modelling of H2-02 Ignition by Hot Spots 12th ICODERS Ann Arbor, Michigan 1989
- Majda, A.J. Roytburt, V. Numerical Modeling of the Initiation of Reacting Shock Waves Computational Fluid Mechanics and Reacting Gas Flows Enquist B. et al. IMA Volumes in Mathematics and its Applications 12 195 217 1988
- Majda, A.J. Roytburt, V. Numerical Study of the Mechanisms for Initiation of Reacting Shock Waves SIAM J. Sci. Stat. Comp. 1989
- Maly, R. Ziegler, G.F.W. Thermal Combustion Modelling - Theoretical and Experimental Investigation of the Knock Process SAE Paper, 820758 1982
- Meyer, J.W. Oppenheim, A.K. On the Shock Induced Ignition of Explosive Gases 13th Symp. (Intl.) on Combustion The Combustion Institute Pittsburgh 1971
- Mietzner, W. Comparing Finite Differences with Particle in Cell Methods on Shocked Unsteady Flow Past a Rectangle Hirschel H. Notes on Numerical Fluid Mechanics 14 175 186 1986
- Miller, C.D. Roles of Detonation Waves and Autoignition in S.I. Engine Knock as Shown by Photographs Taken at 40.000 and 200.000 Frames per Second SAE Quarterly Transactions 1 1947
- Munz, C.D. On the Comparison and Construction of Two-Step Schemes for the Euler Equations Notes on Numerical Fluid Mechanics 14 1986
- Mutschler, J. Untersuchung des Einflusses der Spalt-geometrie auf die Ausbildung von Klopfschäden 1988
- Olsen, A.C. Miller, C.D. The Interdependence of Various Types of Autoignition and Knock NACA Report 912 1948
- Oran, E.S. Boris, J.P. Young, T. Flanigan, M. Burks, T. Picone, M. Numerical Simulation of Detonations in Methane-Air Mixtures 18th Symposium (Intl.) on Combustion The Combustion Institute 1982
- Oran, E.S. Boris, J.P. Numerical Simulation of Reactive Flow Elsevier 1987
- Peters, N. Numerical and Asymptotic Analysis of Systematically Reduced Reaction Schemes for Hydrocarbon Flames Lecture Notes in Physics Springer 241 90 109 1985
- Peters, N. Systematic Reduction of Flame Kinetics - Principles and Details 11th ICODERS Warsaw Poland August 1987
- Pischinger, F. Kollmeier, H.P. Spicher, U. Das Klopfen M Otto-Motor - Ein altes Problem aus neuer Sich 49 1987
- Ricardo, R.R. Parafin as Fuel Automobile Engineer 9 2 5 1919
- Roe, P.L. Approximate Riemann Solvers, Parameter Vectors and Difference Schemes J. Comp. Phys. 43 357 372 1981
- Schmidt, F.A.F. Verbrennungskraftmaschinen 1967
- Schoeffel, S.U. Ebert, F. A Numerical Investigation of the Reestablishment of a Quenched Gaseous Detonation 16th Intl. Conference on Shock Tubes and Waves ‘Shock Tubes and Waves’ Grönig H. 1988
- Shepherd, J.E. Chemical Kinetics of Hydrogen-Air- Diluent Detonations Progress in Aeronautics and Astronautics Bowen J.R. et al. 106 263 293 1986
- Shepherd, J.E. Teodorezyk, A. Knystautas, R. Lee, J.H. Shock Waves Produced by Reflected Detonations 12th ICODERS Ann Arbor, Michigan 1989
- Sileem, A. Kassoy, D.R. Thermal Initiation of Planar Detonation Waves 12th ICODERS Ann Arbor, Michigan 1989
- Skews, B.W. The Perturbed Region Behind a Diffracting Shock Wave JFM 29 705 719 1967
- Späth, D. Experimentelle Untersuchung der Klopf-schadensmechanismen 1988
- Stanyukovic, K.P. Unsteady Motion of Continous Media Pergamon 1960
- Strang, G. On the Construction and Comparison of Difference Schemes SIAM J. Numer. Anal. 5 506 517 1968
- Tagaki, Y. Laser Shadowgraphic Analysis of Knocking Combustion in an S.L Engine Japan SAE paper, 831005 1983
- Taki, S. Fujiwara, T. Numerical Simulation of Triple Shock Behaviour of Gaseous Detonation 18th Symposium on (Intl.) Combustion The Combustion Institute 1981
- Tieszen, S.R. Douglas, W.S. Westbrook, C.K. Pitz, J.W. Gaseous Hydrocarbon Detonations Sandia Rep. SAND88-1925C 1988
- Westbrook, C.K. Chemical Kinetics of Hydrocarbon Oxidation in Gaseous Detonations Combustion & Flame 46 191 210 1982
- Westbrook, C.K. Pitz, W.J. Urtiew, P.A. Chemical Kinetics of Propane Oxidation in Gaseous Detonations Dynamics of Shock Waves, Explosions and Detonations Bowen J.R. Manson N. Oppenheim A.K. Soloukhin R.I. 1985
- Westbrook, C.K. Warnatz, Pitz, W.J. A Detailed Chemical Reaction Mechanism of the Oxidation of Iso-Octane and N-Heptane over an Extended Temperature Range and its Application to the Analysis of Engine Knock 22th Symposium (Intl.) on Combustion The Combustion Institute Pittsburgh 22 1988
- Whitham, G.B. Linear and Nonlinear Waves J. Wiley & Sons 1974
- Williams, F.A. Combustion Theory 2nd Benjamin/Cummings 1985
- Zel'dovic, Ya. B. Stanyukovic, K.P. Reflection of a plane Detonation Wave 61 2 1942