Analysis of pressure waves in the cone-type combustion chamber under SI engine knock

For the internal-combustion engine, super knock produced by the engine downsizing technology induces severe oscillations in a combustion chamber, which may damage the piston. In this work, 3D numerical simulation is used to study the propagation and reflection of pressure waves produced in the cone roof type combustion chamber. Overpressure distribution of top piston surface is caught. Numerical simulation shows that the pressure waves are amplified in a special zone because of the shape of the combustion chamber, which induces the overpressure much higher than that in other zones. The numerical results are validated by the damaged pistons. It is found that the converged pressure waves could be the reason which causes damage in the local region of the piston under super knock. The results obtained in the study provide assistance in the design of combustion chamber shape in order to avoid piston destroyed by the pressure waves.

[1]  C. French,et al.  Thermal Loading of a Petrol Engine , 1973 .

[2]  Rupert Klein,et al.  Theoretical and Experimental Investigation of Knock Induced Surface Destruction , 1990 .

[3]  Ulrich Spicher,et al.  Irregular combustion in supercharged spark ignition engines – pre-ignition and other phenomena , 2010 .

[4]  A Numerical Method to Analyze Thermoacoustics in an Internal Combustion Engine by Coupling Wave Equation , 2010 .

[5]  Douglas A. Feldmaier,et al.  Cavity resonances in engine combustion chambers and some applications , 1983 .

[6]  J. Eng,et al.  Characterization of Pressure Waves in HCCI Combustion , 2002 .

[7]  Investigation into the relationship between knock intensity and piston seizure , 1992 .

[8]  Kazuyoshi Takayama,et al.  Stability of converging cylindrical shock waves , 1991 .

[9]  Supersonic Flow Around the Axisymmetric Cone Placed in Shock Tube , 2006 .

[10]  Frank P. Incropera,et al.  Fundamentals of Heat and Mass Transfer , 1981 .

[11]  M. Liou,et al.  A New Flux Splitting Scheme , 1993 .

[12]  Anren Yao.  Experimental Study of the Failure Modes of the Methanol-ignition Engine Knock , 2013 .

[13]  T. Si,et al.  Experimental study of Richtmyer-Meshkov instability in a cylindrical converging shock tube , 2014 .

[14]  Xudong Zhen,et al.  Study of knock in a high compression ratio SI methanol engine using LES with detailed chemical kinetics , 2013 .

[15]  B. V. Leer,et al.  Towards the ultimate conservative difference scheme V. A second-order sequel to Godunov's method , 1979 .

[16]  H. Ricardo.  The High-Speed Internal-Combustion Engine , 1968 .

[17]  V. Eliasson,et al.  Focusing of Strong Shocks in an Annular Shock Tube , 2006 .

[18]  Filipe S. Silva,et al.  Fatigue on engine pistons - A compendium of case studies , 2006 .

[19]  Ralph Greif,et al.  Effect of Knock on Time-Resolved Engine Heat Transfer , 1989 .

[20]  Wang Jian-jun.  Investigation on Pre-Ignition Suppression of Turbo-Charged GDI Engine , 2012 .

[21]  E. Galloni,et al.  Dynamic knock detection and quantification in a spark ignition engine by means of a pressure based method , 2012 .

[22]  U. Maas,et al.  Investigations on Pre-Ignition in Highly Supercharged SI Engines , 2010 .

[23]  R. Klein,et al.  Surface erosion by high-speed combustion waves , 1994 .

[24]  Andy Yates,et al.  Knock Damage Mechanisms in Spark-Ignition Engines , 1994 .

[25]  Hui Liu,et al.  Relationship between super-knock and pre-ignition , 2015 .

[26]  Simon Schmuck-Soldan,et al.  Fundamental Approach to Investigate Pre-Ignition in Boosted SI Engines , 2011 .

[27]  Malte T. Kjellander,et al.  Energy concentration by spherical converging shocks generated in a shock tube , 2012 .

[28]  Simona Silvia Merola,et al.  Knock investigation by flame and radical species detection in spark ignition engine for different fuels , 2007 .

[29]  G. Fontana,et al.  Numerical and experimental characterization of knock occurrence in a turbo-charged spark-ignition engine , 2014 .

[30]  Meng-Sing Liou,et al.  Comparison of the AUSM(+) and H-CUSP Schemes for Turbomachinery Applications , 2003 .

[31]  John B. Heywood,et al.  Internal combustion engine fundamentals , 1988 .

[32]  Rudolf Maly,et al.  Role of Exothermic Centres on Knock Initiation and Knock Damage , 1990 .

[33]  David R. Emerson,et al.  Modes of reaction front propagation from hot spots , 2003 .