Numerical simulation for parametric study of a two -stroke compression ignition direct injection linear engine

Shoukry, Ehab

doi:10.33915/etd.1889

Cited by 9 publications

(10 citation statements)

References 9 publications

(24 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Shoukry [85] developed a numerical simulation program using the principles of a previous four-stroke compression ignition linear engine model [59], with changes made to make it possible to investigate the two-stroke compression ignition linear engine in his study. To generalize results, the program was altered to provide dimensionless parametric analysis.…”

Section: Simulation Of the Linear Enginementioning

confidence: 99%

“…Previous research at WVU included the simulation of a four-cylinder four-stroke linear engine [59], the simulation of a two-cylinder two-stroke linear engine [78,81,83,84,85], and the development of a spark ignited two-cylinder two-stoke prototype linear engine [82]. The linear engine prototype developed at West Virginia University can be seen in Figure 35.…”

Section: Electric Generatormentioning

confidence: 99%

“…Computer simulation and results of WVU's second-generation linear engine were presented by Shoukry et al [84] and in the dissertation of Shoukry [85]. From the paper by Shoukry et al [84] it can be concluded that early injection results in loss of efficiency.…”

Section: Computer Simulationmentioning

confidence: 99%

See 2 more Smart Citations

Linear engine development for series hybrid electric vehicles

Tóth-Nagy¹

View full text Add to dashboard Cite

Linear Engine Development for Series Hybrid Electric Vehicles by Csaba Tóth-Nagy This dissertation argues that diminishing oil reserves, concern over global climate change, and desire to improve ambient air quality all demand the development of environment-friendly personal transportation. In certain applications, series hybrid electric vehicles offer an attractive solution to reducing fuel consumption and emissions. Furthermore, linear engines are emerging as a powerplant suited to series HEV applications. In this dissertation, a linear engine/alternator was considered as the auxiliary power unit of a range extender series hybrid electric vehicle. A prototype linear engine/alternator was developed, constructed and tested at West Virginia University. The engine was a 2-stroke, 2-cylinder, dual piston, direct injection, diesel engine. Experiment on the engine was performed to study its behavior. The study variables included mass of the translator, amount of fuel injected, injection timing, load, and stroke with operating frequency and mechanical efficiency as the basis of comparison. The linear engine was analyzed in detail and a simple simulation model was constructed to compare the trends of simulation with the experimental data and to expand on the area where the experimental data were lacking. The simulation was based on a simple and analytical model, rather than a detailed and intensely numerical one. The experimental and theoretical data showed similar trends. Increasing translator mass decreased the operating frequency and increased compression ratio. Larger mass and increased compression ratio improved the ability of the engine to sustain operation and the engine was able to idle on less fuel injected into the cylinder. Increasing the stroke length caused the operating frequency to drop. Increasing fueling or decreasing the load resulted in increased operating frequency. This projects the possibility of using the operating frequency as an input for feedback control of the engine. Injection timing was varied to investigate two different modes of engine operation experimentally. The two modes were direct injection compression ignition (DICI) and "pseudo" homogeneously charged compression ignition (PHCCI). Simulation was performed to include HCCI operation in the study. The study showed that the HCCI operation resulted in higher peak cylinder pressure than that of DICI operation. A combined genetic algorithm-artificial neural network predictor model was used along with the simulation model to find the combination of engine parameters that yielded the highest engine efficiency. The predictor-simulator model suggested the most efficient combination of engine parameters. I thank Dr. Nigel N. Clark for his guidance during my postgraduate studies. Not only he did provide invaluable input to my research, he also showed the way with his integrity, philosophy, and attitude. I also thank Dr.

show abstract

Section: Simulation Of the Linear Enginementioning

confidence: 99%

Section: Electric Generatormentioning

confidence: 99%

See 1 more Smart Citation

Linear engine development for series hybrid electric vehicles

Tóth-Nagy¹

View full text Add to dashboard Cite

show abstract

“…In 2002, Shoukry from WVU worked on the concept of four-stroke OLEA by building a detailed model. The comprehensive model analyzed the importance of stoichiometric ratio, friction, translator mass, geometry of the system, and injection timing with respect to engine frequency and thermal efficiency [18]. In 2002, Van Blarigan from SNL research team developed a loop-scavenged system in KIVA software and aimed at the optimization of scavenging parameters for maximized performance [19].…”

Section: Reported Olea Prototypesmentioning

confidence: 99%

Parametric Investigation of Combustion and Heat Transfer Characteristics of Oscillating Linear Engine Alternator

Bade

Clark

Robinson

et al. 2018

Journal of Combustion

View full text Add to dashboard Cite

An Oscillating Linear Engine Alternator (OLEA) has the potential to overcome the thermal, mechanical, and combustion inadequacies encountered by the conventional slider-crank engines. The linear engines convert the reciprocating piston motion into electricity, thereby eliminating needless crankshaft linkages and rotational motion. As the dead center positions are not explicitly identified unlike crankshaft engines, the linear engine exhibits different stroke and compression ratio every cycle and should manage the unfavorable events like misfire, rapid load changes, and overfueling without the energy storage of a flywheel. Further, the apparatus control and management strategy is difficult for OLEA when compared to conventional engines and depends on the combustion event influencing the translator dynamics. In this research paper, the MATLAB®/Simulink numerical model of a single cylinder, mechanical spring assisted, 2-stroke natural gas fueled, spark-ignited OLEA was investigated to enhance the perception of the coupled system. The effect of combustion and heat transfer characteristics on translator dynamics and performance of OLEA were analyzed by using Wiebe form factors, combustion duration, and heat transfer correlations. Variation in the Wiebe form factors revealed interesting insights into the translator dynamics and in-cylinder thermodynamics of a coupled system. High translator velocity, acceleration, and higher heat transfer rate were favored by low combustion duration.

show abstract

“…[102]. In his dissertation, Shoukry applied single zone modeling with a variation of the double Wiebe profile to study a direct injection compression ignition free piston engine [103]. This formulation is given in Eq.…”

Section: Effects Of Combustion Heat Release Profilementioning

confidence: 99%

Analysis and Optimization of a Dual Free Piston, Spring Assisted, Linear Engine Generator

Robinson¹

View full text Add to dashboard Cite

Numerical simulation for parametric study of a two -stroke compression ignition direct injection linear engine

Abstract: Dedication iv Acknowledgement v Table of Contents vi List of Figures ix List of Tables xxii Nomenclature xxiii Chapter 1 Introduction 1 Chapter 2 Literature Review 6 2.1 Two-Stroke Engine History 6 2.2 Two-Stroke Linear Engine Story and its Development 8 2.3 Modeling of Linear Engine

Cited by 9 publications

References 9 publications

Linear engine development for series hybrid electric vehicles

Linear engine development for series hybrid electric vehicles

Parametric Investigation of Combustion and Heat Transfer Characteristics of Oscillating Linear Engine Alternator

Analysis and Optimization of a Dual Free Piston, Spring Assisted, Linear Engine Generator

Contact Info

Product

Resources

About