Biyodizel pilot yakıtlı doğalgaz motorunda performans karakteristiklerinin Stokastik Reaktör Model kullanılarak incelenmesi

Abstract

Bu çalışmada, bir doğalgaz motorunda farklı biyodizel pilot yakıt püskürtme basınçlarının performans karakteristiklerine etkileri stokastik reactor modele (SRM) dayanan ‘Kinetics & SRM Engine Suite’ yazılımı kullanılarak incelenmiştir. Motorun yanma işleminin benzetimini yapmak için bu gelişmiş yazılım yakıtların kimyasal kinetik mekanizmalarını kullanır. Bu çalışmada, biyodizel yakıtı yansıtmak için 71 bileşen ve 217 reaksiyon içeren ‘Metil dekanoat/metil-9 dekenoat/n-heptan’ kimyasal kinetik mekanizması biyodizelin yerini tutan yakıt kimyasal kinetik mekanizması olarak tanımlanmıştır. Yazılım araçları vasıtasıyla ayarlanan teorik model deneysel very aracılığıyla doğrulanmıştır. Sonrasında, biyodizel pilot yakıtlı doğalgaz motorunun motor performans karakteristiklerini incelemek için benzetim işlemi üç farklı stokastik parçacık sayısında (50, 100 ve 150) gerçekleştirilmiştir. Pilot yakıt püskürtme basıncının artmasıyla motor döndürme momenti ve efektif gücün arttığı fakat özgül yakıt tüketiminin azaldığı gözlemlenmiştir. Buna ek olarak, simülasyonda kullanılan çeşitli stokastik parçacık sayılarının benzetimi yapılmış motor performans karakteristik verilerini önemli ölçüde etkilemediği saptanmıştır.

Keywords

• Çift yakıtlı motor,Doğalgaz,Biyodizel pilot yakıt,Stokastik Reaktör Model,Motor Performansı

Investigation of performance characteristics using Stochastic Reactor Model in a biodiesel pilot-fueled natural gas engine

Abstract

In this study, the effects of different biodiesel pilot fuel injection pressures on performance characteristics of a natural gas engine were investigated using ‘Kinetics & SRM Engine Suite’ software which is based on stochastic reactor model (SRM). This advanced software uses chemical kinetic mechanisms of fuels to simulate combustion process of the engine. ‘Methyl decanoate/methyl-9-decenoate/n-heptane’ reduced chemical kinetic mechanism including 71 species and 217 reactions were defined as a biodiesel surrogate fuel chemical kinetic mechanism to represent biodiesel fuel in this study. Theoretical model set by the way of software tools was validated by experimental data. Then, simulation was run in three different stochastic particle numbers (50, 100, and 150) to investigate engine performance characteristics of a biodiesel pilot-fueled natural gas engine. It is observed that as pilot fuel injection pressure increases, engine torque and brake power enhance, but brake specific fuel consumption decreases. Furthermore, various stochastic particle numbers used in the simulation did not dramatically affect data of engine performance characteristics simulated.

Keywords

• Dual fuel engine,Natural gas,Biodiesel pilot fuel,Stochastic Reactor Model,Engine Performance

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