On the assumption of using n-heptane as a “surrogate fuel” for the description of the cool flame oxidation of diesel oil

Kolaitis, Dionysios I.; Founti, M.

doi:10.1016/j.proci.2008.06.073

Cited by 30 publications

(23 citation statements)

References 22 publications

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“…n-heptan ilave edilen yakıtların motor gücü ve momentinin yüksek olması atomizasyonunun iyi ve yanma verimliliğinin artmasının sonucu olduğu düşünülebilir. Bunun nedeni n-heptanın düşük sıcaklık ve düşük basınçta soğuk alev bölgesinde daha iyi yanma özelliği sergilemesidir [15]. Xue ve ark.…”

Section: Bulgular Ve Tartişma (Results Andunclassified

“…Yüksek ucuculuk özelliği püskürtme sırasındaki atomizasyon ve buharlaşmanın iyileşmesine ve sonuç olarak yanmayı başlatabilecek bölgelsel hava/yakıt karışımlarının daha kolay hazırlanabilmesini sağlar. Bu nedenle özellikle düşük sıcaklık ve düşük basınçta soğuk alev bölgesinde daha iyi yanma özellikleri sergilemektedir [15]. [17].…”

Section: Reaksiyon 60±1unclassified

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Pamuk Meti̇l Esteri̇ne N-Heptan Katkisinin Motor Performansi Ve Yanma Karakteri̇sti̇kleri̇ne Etki̇leri̇ni̇n İncelenmesi̇

Çelik¹,

Solmaz²,

Yücesu³

2015

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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ÖZETYakıt katkılarının dizel motor performansına etkileri birçok araştırmacı tarafından çalışılmış ve umut verici sonuçlar elde edilmiştir. Katkı maddeleri yanma esnasında katalizör etkisi göstererek yakıt kararsızlığı reaksiyonlarını hızlandırmakta ve motor performansı üzerinde olumlu etkiler oluşturmaktadır. Bu çalışmada; rafine edilmiş pamuk yağından transesterifikasyon yöntemi ile biyodizel üretilmiş, üretilen biyodizellere belirli oranlarda n-heptan katılmış ve test edilmiştir. Deneyler tek silindirli bir dizel motorunda sabit devirde ve tam yükte yapılmıştır. Pamuk metil esteri (PH0) yakıtı içerisine n-heptan ilavesi yakıt atomizasyonunu iyileştirmiş ve yanma verimliliği artmıştır. Maksimum güç artışı %8 n-heptan içeren pamuk metil esteri ile (PH8) %7.52 olmuştur. Tüm yakıtlar için maksimum silindir gaz basınçları ve maksimum ısı yayılımı hemen hemen aynı krank açısında oluşmuştur. Çalışmada %8 n-heptan karışımı motor performans ve yanma özellikleri bakımından en iyi sonucu vermiştir.Anahtar Kelimeler: Pamuk metil esteri, yakıt katkı maddesi, yanma karakteristikleri, motor performansı EXAMINATION OF THE EFFECTS OF N-HEPTAN ADDITION TO COTTON METHYL ESTER ON THE ENGINE PERFORMANCE AND COMBUSTION CHARECTERISTICS ABSTRACTThe fuel additives have been studied by many researchers on diesel engine performance and encouraging results have been obtained. During the combustion fuel additives provide the catalyst effect, accelerates the reaction instability and create positive effects on engine performance. In this study; biodiesel was produced by transesterification from the refined cottonseed oil, a certain amount of n-heptane were added in biodiesel and combustion and performance tests were conducted. The experiments was made in a single-cylinder diesel engine at a constant speed and full load. n-heptane added into the cotton methyl ester (PH0) fuel improved the fuel atomization therefore combustion efficiency increased. The maximum power increase was 7.52% in cotton methyl ester fuel containing 8 % n-heptan (PH8). The maximum gas pressure and maximum heat release are formed in almost the same crank angle for all fuels. The 8% n-heptane mixture given the best results in terms of engine performance and combustion characteristics.

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Section: Bulgular Ve Tartişma (Results Andunclassified

Section: Reaksiyon 60±1unclassified

Pamuk Meti̇l Esteri̇ne N-Heptan Katkisinin Motor Performansi Ve Yanma Karakteri̇sti̇kleri̇ne Etki̇leri̇ni̇n İncelenmesi̇

Çelik¹,

Solmaz²,

Yücesu³

2015

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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“…As a result, detailed chemical kinetics models describing diesel oil fuel's oxidation behaviour are currently not available; contemporary modelling approaches are focused on simulating surrogate fuels that are considered thermochemically "equivalent" to diesel oil fuel [2,36,37]. In the present study, n-heptane is used as a surrogate fuel for diesel oil fuel; this assumption is considered reasonable [24], especially in the case of autoignition modelling, since n-heptane's cetane number is very close to that of diesel oil [38,39]. Additionally, it has been shown that both fuels feature a similar heat release rate for both conventional compression ignition ICE and HCCI ICE [40,41].…”

Section: Numerical Simulationsmentioning

confidence: 99%

“…In order to describe in sufficient detail the degenerate chain-branching cool flame oxidative activity leading to the NTC behaviour, multistep detailed chemical kinetics mechanisms have to be used [19,[21][22][23][24][25][26][27][28]. Due to the high computational costs associated with implementing detailed chemical kinetic mechanisms in multiphase CFD tools [29], cool flames are usually neglected in detailed CFD simulations of turbulent reactive flows.…”

Section: Introductionmentioning

confidence: 99%

“…Motivated by the need to numerically simulate the turbulent, multiphase, multicomponent, and reactive flowfield developing in a non-igniting SCF technical device, the authors have developed a variety of alternative modelling techniques [24,[32][33][34][35], aiming to reduce the heavy computational load imposed by the implementation of detailed kinetic schemes into CFD solver. As a part of this ongoing work, the present study focuses on the development of a "tabulated chemistry" modelling approach, capable of simulating the thermochemical behaviour of n-heptane in the low-temperature oxidation and autoignition regimes.…”

Section: Introductionmentioning

confidence: 99%

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Development and Parametric Evaluation of a Tabulated Chemistry Tool for the Simulation of n-Heptane Low-Temperature Oxidation and Autoignition Phenomena

Vourliotakis

Kolaitis

Founti

2014

Journal of Combustion

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Accurate modelling of preignition chemical phenomena requires a detailed description of the respective low-temperature oxidative reactions. Motivated by the need to simulate a diesel oil spray evaporation device operating in the "stabilized" cool flame regime, a "tabulated chemistry" tool is formulated and evaluated. The tool is constructed by performing a large number of kinetic simulations, using the perfectly stirred reactor assumption. n-Heptane is used as a surrogate fuel for diesel oil and a detailed n-heptane mechanism is utilized. Three independent parameters (temperature, fuel concentration, and residence time) are used, spanning both the low-temperature oxidation and the autoignition regimes. Simulation results for heat release rates, fuel consumption and stable or intermediate species production are used to assess the impact of the independent parameters on the system's thermochemical behaviour. Results provide the physical and chemical insight needed to evaluate the performance of the tool when incorporated in a CFD code. Multidimensional thermochemical behaviour "maps" are created, demonstrating that cool flame activity is favoured under fuel-rich conditions and that cool flame temperature boundaries are extended with increasing fuel concentration or residence time.

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Internal Combustion Engine Performance and Emissions Aspects When Fueled by Conventional and Sustainable Fuels

Korakianitis

Imran

Emberson

et al. 2015

Handbook of Clean Energy Systems

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Internal combustion (IC) engines continue to maintain their position as principle prime mover for energy transformation especially in transportation and power sectors. Research on IC engines has many frontiers: optimum engine design to get better fuel utilization and mitigate spefici emissions; development of alternate fuels to reduce the dependence on fast depleting fossil fuels; use of oxygenated hydrocarbons in conventional compression ignition (CI) and spark ignition (SI) engines; development of reaction kinetics and thermal databases for different hydrocarbons to simulate combustion process in IC engines. This study reviews the status of the current research on all of the above mentioned frontiers. It lays down various parameters and their mutual dependencies and how they affect engine' performance and emissions characteristics. Various strategies that are employed to control these performance and emissions characteristics have been discussed. The application of different liquid (Alcohols and biofuels) and gaseous (natural gas and hydrogen) fuels as alternatives to the fossil fuels has been detailed. It also provides an insight into the development of various surrogates for gasoline and diesel fuels. Numerical modelling of the internal combustion engines and the application of emulsified nano‐fuels have also been discussed in detail.

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On the assumption of using n-heptane as a “surrogate fuel” for the description of the cool flame oxidation of diesel oil

Cited by 30 publications

References 22 publications

Pamuk Meti̇l Esteri̇ne N-Heptan Katkisinin Motor Performansi Ve Yanma Karakteri̇sti̇kleri̇ne Etki̇leri̇ni̇n İncelenmesi̇

Pamuk Meti̇l Esteri̇ne N-Heptan Katkisinin Motor Performansi Ve Yanma Karakteri̇sti̇kleri̇ne Etki̇leri̇ni̇n İncelenmesi̇

Development and Parametric Evaluation of a Tabulated Chemistry Tool for the Simulation of n-Heptane Low-Temperature Oxidation and Autoignition Phenomena

Internal Combustion Engine Performance and Emissions Aspects When Fueled by Conventional and Sustainable Fuels

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