Computer Simulation of a Turbocharged Diesel Engine Operating Under Transient Load Conditions PDF Download

Author: J. D. Ledger
Publisher:
ISBN:
Category : Diesel motor
Languages : en
Pages : 12

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Author: S. Walmsley
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Constantine D. Rakopoulos
Publisher: Springer Science & Business Media
ISBN: 1848823754
Category : Technology & Engineering
Languages : en
Pages : 408

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Traditionally, the study of internal combustion engines operation has focused on the steady-state performance. However, the daily driving schedule of automotive and truck engines is inherently related to unsteady conditions. In fact, only a very small portion of a vehicle’s operating pattern is true steady-state, e. g. , when cruising on a motorway. Moreover, the most critical conditions encountered by industrial or marine engines are met during transients too. Unfortunately, the transient operation of turbocharged diesel engines has been associated with slow acceleration rate, hence poor driveability, and overshoot in particulate, gaseous and noise emissions. Despite the relatively large number of published papers, this very important subject has been treated in the past scarcely and only segmentally as regards reference books. Merely two chapters, one in the book Turbocharging the Internal Combustion Engine by N. Watson and M. S. Janota (McMillan Press, 1982) and another one written by D. E. Winterbone in the book The Thermodynamics and Gas Dynamics of Internal Combustion Engines, Vol. II edited by J. H. Horlock and D. E. Winterbone (Clarendon Press, 1986) are dedicated to transient operation. Both books, now out of print, were published a long time ago. Then, it seems reasonable to try to expand on these pioneering works, taking into account the recent technological advances and particularly the global concern about environmental pollution, which has intensified the research on transient (diesel) engine operation, typically through the Transient Cycles certification of new vehicles.

Author: P. C. Parnell
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Author: Andreas Kächele
Publisher: Springer Nature
ISBN: 3658287861
Category : Technology & Engineering
Languages : en
Pages : 123

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Despite the increasing interest in multidimensional combustion engine simulation from researchers and industry, the field of application has been restricted to stationary operating points for turbocharged engines. Andreas Kächele presents a 3D-CFD approach to extend the simulation into the transient regime, enabling the detailed analysis of phenomena during changes in engine operating point. The approach is validated by means of a virtual hot gas test bench and experiments on a two-cylinder engine.

Author: Maged Marzouk Abdel-Hamid
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Constantine D. Rakopoulos
Publisher:
ISBN: 9780768016369
Category : Automobiles
Languages : en
Pages : 40

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Study and modeling of transient operation is an important scientific objective. This is due to the fact that the majority of daily vehicle driving conditions involve transient operation, with non-linear situations experienced during engine transients. Thus, proper interconnection is needed between engine, governor, fuel pump, turbocharger and load. This paper surveys the publications available in the open literature concerning diesel engine simulations under transient operating conditions. Only those models that include both full engine thermodynamic calculations and dynamic powertrain modeling are taken into account, excluding those that focus on control design and optimization. Most of the attention is concentrated to the simulations that follow the filling and emptying modeling approach. A historical overview is given covering, in more detail, research groups with continuous and consistent study of transient operation. One of the main purposes of this paper is to summarize basic equations and modeling aspects concerning in-cylinder calculations, friction, turbocharger, engine dynamics, governor, fuel pump operation, and exhaust emissions during transients. The various limitations of the models are discussed together with the main aspects of transient operation (e.g. turbocharger lag, combustion and friction deterioration), which diversify it from the steady-state. Some of the most important findings in the field during the last 30 years are presented and discussed. The survey extends to special cases of transient diesel engine simulation, such as second-law analysis, response when the turbocharger compressor experiences surge, and whole vehicle performance. Several methods of improving transient response are also mentioned, based on the various simulations. An easy-to-read tabulation of all research groups dealing with the subject, that includes details about each model developed and engines/parameters studied, is also provided at the end of the paper.-- SAE website.

Author: Neil Watson
Publisher:
ISBN:
Category : Automobiles
Languages : en
Pages : 18

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Author: Sikander S. Shamsi
Publisher:
ISBN:
Category : Diesel motor
Languages : en
Pages : 0

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Dynamic performance of turbocharged diesel engines is of considerable importance in some applications such as marine propulsion and electric power generation. Under step-load applications turbocharged engines either recover solely or stall depending on the step size and engine speed. This paper describes the experimental and analytical studies of the dynamic behavior of a turbocharged diesel engine. Specially constructed, computer-controlled engine testbed has been described and transient test results for 100 per cent step-load application presented. A mathematical model based on the quasi-steady state assumption has been described in detail and a digital computer simulation based on this mathematical model briefly discussed. The mathematical model takes into consideration the thermal capacity affect on the exhaust gas temperature, a pulse factor based on the authors idea of mean affective turbine expansion ratio to evaluate turbocharger performance under pulsating flow conditions, extra-steady-state losses during a transient condition and re-direction of smoke. Good agreement between the predicted and the test-bed results was achieved. Illustrations describe the text-bed, dynamometer, printed circuit electromechanical governor and predicted and test-bed transient results.

Author:
Publisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages : 464

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