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Author : M. Anbarasu
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (322 download)
Download or read book Modeling of Early Flame Growth and Pressure Rise in a Spark Ignition Engine written by M. Anbarasu and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : M. Anbarasu
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.:/5 (631 download)
Download or read book Modeling of Early Pressure Rise and Flame Growth in a Spark Ignition Engine written by M. Anbarasu and published by . This book was released on 1994 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : P. A. Lakshminarayanan
Publisher : Springer Nature
ISBN 13 : 9819706297
Total Pages : 678 pages
Book Rating : 4.8/5 (197 download)
Download or read book Modelling Spark Ignition Combustion written by P. A. Lakshminarayanan and published by Springer Nature. This book was released on with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book DEVELOPMENT OF A TURBULENT BURNING VELOCITY MODEL BASED ON FLAME STRETCH CONCEPT FOR SPARK IGNITION ENGINES written by and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract : This PhD dissertation develops a turbulent burning velocity model based on flame stretch concept and couples it with an engine cycle simulation program (GT-Power) to improve its turbulent combustion modeling capability. In a non-turbulent mixture, flame propagation is laminar and the flame has a smooth surface. However, in a turbulent flow field (i.e. internal combustion engines), the flame front is no longer smooth. This was the motivation to experimentally study the burning velocity and flame stretch under engine in-cylinder conditions. Flame front propagation analysis showed that during the flame propagation period, the flame stretch decreased until the flame front touched the piston surface. This was a common trend for stoichiometric, lean and rich mixtures, which occurred because the flame radius was the dominant factor in flame stretch calculation. In addition, the rich fuel-air mixture (ɸ = 1.18) showed a lower flame stretch compared to stoichiometric (ɸ = 1.0) or lean mixtures (ɸ = 0.84). This was due to the lower Markstein number, the representation of flame sensitivity to flame stretch, for the rich fuel-air mixture compared to the stoichiometric or lean mixtures. The ratio of the thermal to mass diffusivity appeared to be the dominant factor in the Markstein number. Furthermore, comparing the flame stretch at three different engine speeds revealed that increasing the speed increases the flame stretch; especially during the early flame development period. In addition, dimensional analysis was utilized and a turbulent burning velocity model was developed based on the flame stretch concept. The model showed that the turbulent burning velocity decreased due to flame stretching. Although it was shown that increasing engine speed increases turbulent burning velocity by increasing the turbulent intensity (and hence the turbulent flame surface), a tradeoff between the AT/AL and the flame stretch due to higher engine speed was observed in the model. In cases where the flame distortion was very high, the flame stretch may cancel out any benefits of a large enflamed area. While the turbulent burning velocity model was developed for an optically-accessible DISI engine at low engine speed and load, it was also tested using data from a four-stroke, liquid-cooled, two-cylinder, carbureted engine at higher speeds and loads. Comparison of the engine in-cylinder pressure, heat release and performance parameters from simulation and experiments for the engine revealed that the developed turbulent burning velocity model coupled with GT-Power significantly improved the turbulent combustion modeling capability of GT-Power. In addition, simulation results showed that the flame stretch may result in a 35% reduction in turbulent burning velocity at very early (MFB This research also investigated combustion variations using 2D intensity images and compared the results to COV of IMEP computed from in-cylinder pressure data. The results revealed a strong correlation between the variations of the luminosity field during the main phase of combustion and the COV of IMEP. However, during the ignition and early (MFB Since the images consist of pixels, uncertainty analysis was conducted to determine the effect of image quality on the flame stretch. Results showed that a maximum relative uncertainty of 4.5% in the flame stretch calculation occurred during the early flame development period and it decreased to less than 1% with increasing flame radius.
Author : Rowland S. Benson
Publisher : Elsevier
ISBN 13 : 1483140024
Total Pages : 216 pages
Book Rating : 4.4/5 (831 download)
Download or read book Internal Combustion Engines written by Rowland S. Benson and published by Elsevier. This book was released on 2013-10-22 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Internal Combustion of Engines: A Detailed Introduction to the Thermodynamics of Spark and Compression Ignition Engines, Their Design and Development focuses on the design, development, and operations of spark and compression ignition engines. The book first describes internal combustion engines, including rotary, compression, and indirect or spark ignition engines. The publication then discusses basic thermodynamics and gas dynamics. Topics include first and second laws of thermodynamics; internal energy and enthalpy diagrams; gas mixtures and homocentric flow; and state equation. The text takes a look at air standard cycle and combustion in spark and compression ignition engines. Air standard cycle efficiencies; models for compression ignition combustion calculations; chemical thermodynamic models for normal combustion; and combustion-generated emissions are underscored. The publication also considers heat transfer in engines, including heat transfer in internal combustion and instantaneous heat transfer calculations. The book is a dependable reference for readers interested in spark and compression ignition engines.
Author : Jaehong Kim
Publisher :
ISBN 13 :
Total Pages : 304 pages
Book Rating : 4.3/5 (91 download)
Download or read book Turbulence Effects on the Early Flame Development of Propane-air Mixtures written by Jaehong Kim and published by . This book was released on 1995 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : P. A. Lakshminarayanan
Publisher : Springer
ISBN 13 : 9789819706280
Total Pages : 0 pages
Book Rating : 4.7/5 (62 download)
Download or read book Modelling Spark Ignition Combustion written by P. A. Lakshminarayanan and published by Springer. This book was released on 2024-05-02 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book provides a comprehensive overview of combustion models used in different types of spark ignition engines. In the first generation of spark ignition (SI) engines, the turbulence is created by the shear flow passing through the intake valves, and significantly decays during the intake and compression strokes. The residual turbulence enhances the laminar flame velocity, which is characteristic of the fuel and increases the relative effectiveness of the engine. In this simple two-zone model, the turbulence is estimated empirically; the spherical flame propagation model considers ignition delay, thermodynamics, heat transfer and chemical equilibrium, to obtain the performance and emissions of an SI engine. The model is used extensively by designers and research engineers to handle the fuel-air mixture prepared in the inlet and different geometries of open combustion chambers. The empiricism of the combustion model was progressively dismantled over the years. New 3D models for ignition considering the flow near a spark plug and flame propagation in the bulk gases were developed by incorporating solutions to Reynolds-averaged Navier-Stokes (RANS) equations for the turbulent flow with chemical reactions in the intense computational fluid dynamics. The models became far less empirical and enabled treating new generation direct-injection spark-ignition (DISI) gasoline and gas engines. The more complex layout of DISI engines with passive or active prechamber is successfully handled by them. This book presents details of models of SI engine combustion progressively increasing in complexity, making them accessible to designers, researchers, and even mechanical engineers who are curious to explore the field. This book is a valuable resource for anyone interested in spark ignition combustion.
Author : Peter C. Moilanen
Publisher :
ISBN 13 :
Total Pages : 200 pages
Book Rating : 4.:/5 (284 download)
Download or read book Early Pressure Development Due to Flame Kernel Growth in a Spark Ignited Engine written by Peter C. Moilanen and published by . This book was released on 1993 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Thomas Joseph Dahm
Publisher :
ISBN 13 :
Total Pages : 144 pages
Book Rating : 4.:/5 (29 download)
Download or read book An Investigation of Flame Speeds in a Spark Ignition Engine written by Thomas Joseph Dahm and published by . This book was released on 1957 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book DEVELOPMENT OF A TURBULENT FLAME SPEED MODEL BASED ON FLAME STRETCH CONCEPT FOR SPARK IGNITION ENGINES written by and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract : This is an MSc report to develop a turbulent combustion model and couple it with engine simulation software to improve its predictive capability. For liquid or gaseous fuels one of the most important quantities is the velocity at which the flame front propagates normal to itself and relative to the flow into the unburned mixture. In a non-turbulent mixture, flame propagation is laminar and the flame has smooth surface. However, in a turbulent flow field, the flame front is no longer smooth and the reaction zone is thicker than that in laminar case. According to Damkohler theory, the increase in flame front area due to turbulence causes to increase the flame speed. However, recent studies show that the ratio of turbulent to laminar flame speed (ST/SL) depends on both the relative increase in flame surface area as a result of turbulence, and the relative drop in local flame speed as a result of stretching. The proposed research will empirically study the effect of stretching on flame speed under engine-like conditions and develop a model for flame speed base on that. For this reason, flame surface area and speed will be found by processing high speed images which are taken from flame inside cylinder. Then, the developed combustion model will be coupled with GT-Power engine simulation software in order to, first, evaluate the developed model and then, improve the GT-Power predictive combustion capability. To specify initial conditions correctly, the initial swirl and tumble values will be measured by using the steady-flow-rig method. Finally, to verify the simulation and developed turbulent combustion model, a V-twin, four-stroke, air cooled, ECH 749 Kohler engine will be used.
Author : Alexander Fandakov
Publisher : Springer
ISBN 13 : 3658248750
Total Pages : 265 pages
Book Rating : 4.6/5 (582 download)
Download or read book A Phenomenological Knock Model for the Development of Future Engine Concepts written by Alexander Fandakov and published by Springer. This book was released on 2018-12-28 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: The majority of 0D/1D knock models available today are known for their poor accuracy and the great effort needed for their calibration. Alexander Fandakov presents a novel, extensively validated phenomenological knock model for the development of future engine concepts within a 0D/1D simulation environment that has one engine-specific calibration parameter. Benchmarks against the models commonly used in the automotive industry reveal the huge gain in knock boundary prediction accuracy achieved with the approach proposed in this work. Thus, the new knock model contributes substantially to the efficient design of spark ignition engines employing technologies such as full-load exhaust gas recirculation, water injection, variable compression ratio or lean combustion. About the Author Alexander Fandakov holds a PhD in automotive powertrain engineering from the Institute of Internal Combustion Engines and Automotive Engineering (IVK) at the University of Stuttgart, Germany. Currently, he is working as an advanced powertrain development engineer in the automotive industry.
Author : E. S. Starkman
Publisher :
ISBN 13 :
Total Pages : 19 pages
Book Rating : 4.:/5 (338 download)
Download or read book Flame Speeds and Pressure Rise Rates in Spark Ignition Engines written by E. S. Starkman and published by . This book was released on 1959 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Linda Maria Beck
Publisher : Logos Verlag Berlin
ISBN 13 : 9783832534264
Total Pages : 0 pages
Book Rating : 4.5/5 (342 download)
Download or read book Multiphysical Modelling of Regular and Irregular Combustion in Spark Ignition Engines Using an Integrated / Interactive Flamelet Approach written by Linda Maria Beck and published by Logos Verlag Berlin. This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The virtual development of future Spark Ignition (SI) engine combustion processes in three-dimensional Computational Fluid Dynamics (3D-CFD) demands for the integration of detailed chemistry, enabling - additionally to the 3D-CFD modelling of flow and mixture formation - the prediction of fuel-dependent SI engine combustion in all of its complexity. This work presents an approach, which constitutes a coupled solution for flame propagation, auto-ignition, and emission formation modelling incorporating detailed chemistry, while exhibiting low computational costs. For modelling the regular flame propagation, a laminar flamelet approach, the G-equation is used. Auto-ignition phenomena are addressed using an integrated flamelet approach, which bases on the tabulation of fuel-dependent reaction kinetics. By introducing a progress variable for the auto-ignition - the Ignition Progress Variable (IPV) - detailed chemistry is integrated in 3D-CFD. The modelling of emission formation bases on an interactively coupled flamelet approach, the Transient Interactive Flamelet (TIF) model. The functionality of the combined approach to model the variety of SI engine combustion phenomena is proved first in terms of fundamentals and standalone sub-model functionality studies by introducing a simplified test case, which represents an adiabatic pressure vessel without moving meshes. Following the basic functionality studies, the sub-model functionalities are investigated and validated in adequate engine test cases. It is shown, that the approach allows to detect locally occurring auto-ignition phenomena in the combustion chamber, and to model their interaction with regular flame propagation. Moreover, the approach enables the prediction of emission formation on cell level.
Author : Peter Christopher Hinze
Publisher :
ISBN 13 :
Total Pages : 61 pages
Book Rating : 4.:/5 (283 download)
Download or read book A Study of Fuel Effects on Early Flame Development in a Spark Ignition Engine written by Peter Christopher Hinze and published by . This book was released on 1993 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher : Cuvillier Verlag
ISBN 13 : 3736918003
Total Pages : 182 pages
Book Rating : 4.7/5 (369 download)
Download or read book A Level Set Based Flamelet Model for the Prediction of Combustion in Homogeneous Charge and Direct Injection Spark Ignition Engines written by and published by Cuvillier Verlag. This book was released on 2006-03-01 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Long Liang
Publisher :
ISBN 13 :
Total Pages : 210 pages
Book Rating : 4.:/5 (89 download)
Download or read book Multidimensional Modeling of Combustion and Knock in Spark-ignition Engines with Detailed Chemical Kinetics written by Long Liang and published by . This book was released on 2006 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 1000 pages
Book Rating : 4.:/5 (318 download)
Download or read book Annual Index/abstracts of SAE Technical Papers written by and published by . This book was released on 2006 with total page 1000 pages. Available in PDF, EPUB and Kindle. Book excerpt:
