Farklı Enjeksiyon Basıncının Dizel Motor Performansı ve NOX Emisyonu Üzerindeki Etkilerinin Sayısal Olarak İncelenmesi

Öz

Dizel motorların avantajlı verimleri onları en yaygın içten yanmalı motor türü yapmaktadır. Bununla birlikte, dizel motorlar aynı zamanda yanma işlemi sonucunda oluşan partikül madde (PM) ve nitrojen oksit (NOX) emisyonlarının birincil kaynaklarıdır. Dizel motorun performansını etkileyen birçok değişken vardır. Bunlardan biri enjeksiyon basıncıdır. Yanma sürecinin dizel motorların emisyon oluşumunda çok önemli etkisi vardır ve bu süreç yakıt atomizasyonundan büyük ölçüde etkilenmektedir. Enjektörler, yakıtın atomizasyonunu kontrol eden dizel motorların en önemli bileşenlerinden biridir. Günümüzün modern enjektörleri, yakıt atomizasyonunu iyileştirmek için yüksek enjeksiyon basınçları sağlar. Egzoz emisyonlarını ve yakıt tüketimini azaltmak için dört silindirli motorlarda yüksek basınçlı yakıt enjeksiyonunun etkisi sayısal olarak incelenmiştir. Artan enjeksiyon basıncı, özellikle düşük ve orta hızlarda duman ve yakıt tüketimini iyileştirir. Ancak bazı değişkenler basınç artışlarından olumsuz etkilenebilir. Bu çalışmada, 500-800 bar ve 800-1000 bar için farklı enjeksiyon basınçlarında motor performansını etkileyen değişkenler gözlemlenmiş ve sonuçlar paylaşılmıştır.

Anahtar Kelimeler

• Dizel motor
• Enjeksiyon basıncı
• Yüksek basınç
• Yakıt tüketimi

Numerical Investigation of Effects of Different Injection Pressure on Diesel Engine Performance and NOX Emission

Öz

Favourable efficiency of diesel engines makes them the most abundant type of internal combustion engines. However, diesel engines are also primary sources of particulate matter (PM) and nitrogen oxides (NOX) emissions formed as a result of the combustion process. There are many variables to affect the performance of diesel engine. One of them is injection pressure. Combustion process has a crucial effect on emission formation of diesel engines and this process is highly affected by fuel atomization. Injectors are one of the most important components of diesel engines that control the atomization of fuel. Today’s modern injectors provide high injection pressures to improve fuel atomization. To reduce exhaust emissions and fuel consumption, the effect of high-pressure fuel injection was investigated in fourcylinder engines numerically. Increased injection pressure improves smoke and fuel consumption, especially at low and medium speeds. However, some variables can be adversely affected by pressure increases. In this study, variables affecting engine performance were observed at different injection pressures for 500-800 bar and 800-1000 bar, and the results were shared.

Anahtar Kelimeler

• Diesel engine
• Injection pressure
• High pressure
• Fuel consumption

Kaynakça

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