Direct Injection Diesel Engine Rate of Heat Release Prediction using Universal Load Correction Factor in Double Wiebe Function for Performance Simulation

Loganathan, S.; Manohar, R.; Thamaraikannan, R.; Dhanasekaran, R.; Rameshbabu, A.; Krishnamoorthy, V.

doi:10.4271/2011-01-2456

Cited by 13 publications

(12 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…U p is the piston speed and is given by Also, in Eq. (1), the rate of heat input to the cylinder dQ in dθ is modelled using a double-Wiebe function [21,22] where p and d refer to premixed and diffusion phases of combustion. The parameters θ p and θ d represent the duration of the premixed and diffusion combustion phases.…”

Section: Modelling Of Engine Processesmentioning

confidence: 99%

See 1 more Smart Citation

Effect of split injection in mitigation of pollutant formation from a CI engine: a numerical study

Sindhu

Rao

Murthy

2015

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

NOx levels are achieved with 20 % EGR with deterioration in engine performance, whereas with split injection NOx levels could be reduced without much loss in engine performance. The present analysis realized in a trade-off between NOx emissions and piston work. It is concluded that engine with split-injection strategy incorporated with electronic controls could be a better option for mitigating harmful engine emissions. Keywords Diesel engine • Performance • NO-soot emissions • EGR • Pilot injections Abbreviations ATDC After top dead centre BTDC Before top dead centre BDC Bottom dead centre CA Crank angle, degree EGR Exhaust gas recirculation LHV Lower heating value, kJ/kg K SOI Start of injection, degree TDC Top dead centre List of symbols a Constant used in Eq. (6) A h Heat transfer area, m 2 C p Constant pressure-specific heat, kJ/kg K C v Constant volume-specific heat, kJ/kg K C 1 Constant used in Eq. (4) D Cylinder bore, m d s Diameter of soot particle, 0.022 10 −6 m h Heat transfer coefficient for cylinder gases through convection, W/m 2 K m Mass of the gases present in the cylinder, kg m f Mass of fuel injected into the cylinder, kg m a Mass of air inducted into the cylinder, kg Abstract Compression ignitions with diesel fuel find wide applications ranging from light duty to heavy duty. Diesel engines exhibit higher fuel conversion efficiency when compared to its counterpart-spark ignited engines. However, diesels pose the challenges of high NOx and soot emissions. Pollution-related issues are hampering the engine development processes. Experimental studies demand expensive hardware and researchers are resorting to computational investigation in optimizing engine performance parameters. Exhaust gas recirculation has been widely adopted to lower NOx emissions. Of late, split or multiple-injection strategy has been explored by many to precisely control the fuel injected per cycle and also to mitigate emissions. The present paper deals with the development of a single-zone phenomenological model for the combustion process for both in conventional and in a split injection diesel engine. The model considers a numerical solution of the energy equation while considering the effects of heat loss and temporally varying mixture-averaged values of gas constant. Pre-injection and main injection were modelled using physics-based models for fuel injection, ignition delay, premixed and diffusion heat release rates. The present study also emphasizes on pollutant formation of diesel engine under different operating conditions such as fuel injection timings, ambient conditions and EGR. EGR levels have been varied from 0 to 20 % where as two different multiple-injection levels are incorporated to examine the efficacy of the techniques adopted. It is observed that very low Technical editor: Luis Fernando Figueira da Silva.

show abstract

Section: Modelling Of Engine Processesmentioning

confidence: 99%

“…The constants a, m p , m d are selected to match experimental data. For the current study, these values are selected as 6.9, 4, and 1.5, respectively [21,22]. It is assumed that the total heat input to the cylinder by combustion for one cycle is (1)…”

Section: Modelling Of Engine Processesmentioning

confidence: 99%

Effect of split injection in mitigation of pollutant formation from a CI engine: a numerical study

Sindhu

Rao

Murthy

2015

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

show abstract

“…This type of model is widely used for the simulation of engines [14][15][16] and for calculation of the heat release rate of fuel [17][18][19]. Wiebe's function is one of the widely used combustion models in working process and engine performance simulation [20,21]. Moreover, the parameters of Wiebe's function are optimized by applying experimental data and adjustable corresponding to the changing of the running conditions of the engine [22,23].…”

Section: Introductionmentioning

confidence: 99%

A Zero-Dimensional Mixing Controlled Combustion Model for Real Time Performance Simulation of Marine Two-Stroke Diesel Engines

et al. 2019

View full text Add to dashboard Cite

The paper presents a performance prediction model of marine low-speed two-stroke diesel engines based on an advanced MCC (mixture controlled combustion) model coupled with a fuel injection model. Considering the time of real calculation, the so-called “concentrated exhausting gas” scavenging model and the working process model are used in the present work, and improved by introducing the ratio of pure combustion product over the total gas mass in the cylinder as an expression of the working medium components. The reaction rate model in the zero-dimensional MCC model is improved by introducing the fraction of combustion product in the fuel spray, and the relationship between the combustion model and scavenging quality is established. Meanwhile, the combustion model was simplified in the diffusion combustion phases and integrated with the fuel injection model in order to respond to the change of injection profile and injection timing. A large-scale low-speed marine diesel engine was used for a simulation. The results of the whole model are consistent with experimental data and the speed of calculation is fast enough for real time simulation of low speed and medium speed diesel engines. The prediction model can be used in the design and calibration of the electronic control system and performance optimization of the marine two-stroke diesel engine.

show abstract

“…In a similar approach, Vandersickel et al 12 developed an empirical formula for low-, intermediate-, and high-temperature reactions at conditions similar to those inherent in HCCI engines. Arrhenius form-like models can also capture the combustion initiation in DI diesel engines [13][14][15][16] as well as PCCI engines. 17 Although Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Modeling of combustion phasing of a reactivity-controlled compression ignition engine for control applications

Sadabadi

Shahbakhti

Bharath

et al. 2015

International Journal of Engine Research

View full text Add to dashboard Cite

Reactivity-controlled compression ignition (RCCI) is a promising combustion strategy to achieve near-zero NOx and soot emissions and diesel-like efficiencies. Model-based control of RCCI combustion phasing requires a computationally efficient combustion model that encompasses factors such as injection timings, fuel blend composition, and reactivity. In this work, physics-based models are developed to predict the onset of auto-ignition in RCCI and to estimate the burn duration based on an approximation of the spontaneous ignition front speed. A mean value control-oriented model of RCCI is then developed by combining the auto-ignition model, the burn duration model, and a Wiebe function to predict combustion phasing. The control-oriented model is parameterized and validated using simulation data from an experimentally validated, detailed computational fluid dynamics combustion model developed using the KIVA-3V code. The validation results show that the control-oriented model can predict the start of combustion, burn duration, and crank angle of 50% burnt fuel with an average error of less than 2 crank angle degrees. Thus, the control-oriented model demonstrates sufficient accuracy in predicting RCCI combustion phasing for control applications. The control-oriented model is an integral part of designing a model-based controller, which in the case of RCCI is of paramount importance due to various attributes concerning combustion, particularly for transient engine operation.

show abstract

Direct Injection Diesel Engine Rate of Heat Release Prediction using Universal Load Correction Factor in Double Wiebe Function for Performance Simulation

Cited by 13 publications

References 21 publications

Effect of split injection in mitigation of pollutant formation from a CI engine: a numerical study

Effect of split injection in mitigation of pollutant formation from a CI engine: a numerical study

A Zero-Dimensional Mixing Controlled Combustion Model for Real Time Performance Simulation of Marine Two-Stroke Diesel Engines

Modeling of combustion phasing of a reactivity-controlled compression ignition engine for control applications

Contact Info

Product

Resources

About