Autoignition modeling of natural gas for engine modeling programs: an experimental and modeling study

Soylu, Seref

doi:10.31274/rtd-180813-13198

Cited by 6 publications

(5 citation statements)

References 93 publications

(129 reference statements)

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“…Based on the test results and literature, a significant, but not a hard level of knocking [5,12] was chosen for the maximum pressure deviation KP_PK (Knock Peak) equal to 3.0-4.0 bar [13][14][15]. This value was obtained as a result of engine tests and compared with a distinctly audible noise of knocking combustion.…”

Section: Proposed Methodologymentioning

confidence: 99%

CFD Simulation of Knock Onset in a Heavy-Duty Spark Ignition Gas Engine

Kozlov,

Terenchenko,

Zuev

et al. 2019

IJRTE

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 Abstract: The paper describes a method for evaluating knocking onset with computational fluid dynamics (CFD) numerical model of the combustion process of spark ignited (SI) gas engine and methods for assessing the probability of knocking combustion based on this model. The probability of knocking combustion, which characterizes the boundary condition between normal combustion and knocking, is determined (8%). An optimization study of the influence of adjustment parameters on the probability of knocking based on a three-dimensional numerical model is carried out. The developed and tested technique allows one to monitor the tendency of the influence of various adjustment parameters on the probability of knocking in a SI gas engine. Keywords: natural gas, spark ignition gas engine, knock onset, computational fluid dynamic, combustion process, start of combustion test bench, knocking probability, knock index.

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Section: Proposed Methodologymentioning

confidence: 99%

CFD Simulation of Knock Onset in a Heavy-Duty Spark Ignition Gas Engine

Kozlov,

Terenchenko,

Zuev

et al. 2019

IJRTE

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“…As a result, it affects early flame development and flame propagation period. 19,20) This indicates that the change in fuel injection timing also affects combustion process and the main combustion periods at the same lambdas. Fig.…”

Section: Decreases Burning Velocity Due To Lowmentioning

confidence: 96%

Combustion and Emission Characteristics of a Natural Gas Engine under Different Operating Conditions

Cho¹,

He²

2009

Environmental Engineering Research

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Natural gas is a promising alternative fuel of internal combustion engines. In this paper, the combustion and emission characteristics were investigated on a natural gas engine at two different fuel injection timings during the intake stroke. The results show that fuel injection timing affects combustion processes. The optimum spark timing (MBT) achieving the maximum indicated mean effective pressure (IMEP) is related to fuel injection timing and air fuel ratio.At MBT spark timing, late fuel injection timing delays ignition timing and prolongs combustion duration in most cases. But fuel injection timing has little effect on IMEP at fixed lambdas. The coefficient of variation (COV) of IMEP is dependent on air fuel ratio, throttle positions and fuel injection timings at MBT spark timing. The COV of IMEP increases with lambda in most cases. Late fuel injection timings can reduce the COV of IMEP at part loads. Moreover, engine-out CO and total hydrocarbon (THC) emissions can be reduced at late fuel injection timing.

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“…Furthermore, in literature, there is an emphasis on the importance of selecting appropriate methods and techniques to achieve the goals of the contents determined in the mathematics curriculum (Pesen, 2008). According to De Holton, Ahmed, Williams & Hill (2001) and Soylu (2001), teaching mathematics with game-based activities is an effective method for changing students' viewpoints about mathematics and for helping them acquire the mathematical thinking skills. Similarly, one of the methods used to develop students' problem solving skills and to encourage them to take an active role in lessons is the visual tool of concept cartoons (Balım, İnel & Evrekli, 2008).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Use of Concept Cartoon Activities in Teaching the Translation Concept from Students’ Perspectives

Akbaş

Kılıç²

2019

JETS

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The present study aimed to examine students’ views about the evaluation of teaching via concept cartoon activities related to the translation concept within the scope of the sub-learning domain of 8th grade transformation geometry. The study was carried out using the case study method, which is based on the qualitative approach. The participants in the study were 40 8th grade students (25 female and 16 male) from two different classes of a state secondary school located in the Eastern Anatolia in Turkey. The application process in the study was conducted in one week, and the interviews held following the application process lasted three days. As the data collection tool, a semi-structured five-item interview form was used. The interviews were audio recorded, and they were transcribed and analyzed using the content analysis method. Following this, the students’ responses to each interview question were coded. Codings were obtained using an inductive analysis method. The research results revealed that the concept cartoon activities provided the students with a wide variety of benefits (instructive, entertaining, motivating, mental development and so on) and that the students had positive views about the use of cartoon activities in lessons. Considering the analysis results and the students’ views, the educational and methodological aspects of the study were discussed.

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Autoignition modeling of natural gas for engine modeling programs: an experimental and modeling study

Cited by 6 publications

References 93 publications

CFD Simulation of Knock Onset in a Heavy-Duty Spark Ignition Gas Engine

CFD Simulation of Knock Onset in a Heavy-Duty Spark Ignition Gas Engine

Combustion and Emission Characteristics of a Natural Gas Engine under Different Operating Conditions

Evaluation of the Use of Concept Cartoon Activities in Teaching the Translation Concept from Students’ Perspectives

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