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BENZİN VE GAZ YAKITLAR İÇİN YAĞ FİLMİ KAYNAKLI HC EMİSYONLARININ MATEMATİK MODELLENMESİ

MATHEMATICAL MODELING OF HC EMISSIONS RELEASED by OIL FILM for GASOLINE and GASEOUS FUELS

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Abstract (2. Language): 
Oil film on cylinder liner has been suggested as a major source of engine-out hydrocarbon emissions. In this study, a mathematical modeling for the rate of absorption/desorption of the fuel in the oil film has been developed for gasoline, LPG and methane. It was seen that the absorption/desorption mechanism of LPG and methane into the oil film were lower than gasoline. It was determined that the most dominant parameter of this difference was Henry’s constant, which was related to solubility. As interaction time of oil film-fuel vapor was longer at low engine speeds, the quantities of HC absorbed/desorbed increased. The quantities of HC absorbed/desorbed increased with increasing inlet pressure and compression ratio.
Abstract (Original Language): 
Silindir cidarları üzerindeki yağ filmi motor çıkış hidrokarbon (HC) emisyonlarının ana kaynaklarından birisi olarak bilinmektedir. Bu çalışmada, benzin, LPG ve metan için yağ filmi içerine emilen/salınan yakıt miktarı için matematik bir model geliştirilmiştir. Yağ filmi tarafından emilen/salınan LPG ve metanın benzinden daha düşük seviyede olduğu görülmüştür. Bu farklılığın en önemli parametresi çözünürlükle ilgili olan Henry sabiti olduğu tespit edilmiştir. Düşük motor devirlerinde yağ filmi yakıt buharı etkileşimine daha uzun süre tanındığı için emilen/salınan HC miktarları artmıştır. Artan sıkıştırma oranı ve giriş basıncı ile birlikte emilen/salınan HC miktarları artmıştır.
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352 Gazi Üniv. Müh. Mim. Fak. Der. Cilt 29, No 2, 2014
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