NUMERICAL INVESTIGATION OF THE SPRAY CHARACTERISTICS IN AN OUTWARDLY-OPENING PIEZOELECTRIC GASOLINE INJECTOR FOR DIFFERENT AMBIENT CONDITIONS

Abstract

Keywords

• spray atomization and characteristics,mixture formation,hollow cone spray,KH-RT

Numerical Investigation of the Spray Characteristics in an Outwardly-Opening Piezoelectric Gasoline Injector for Different Ambient Conditions

Abstract

Bu çalışmada, dışa doğru açılan bir enjektörün püskürtme karakteristikleri nümerik olarak incelenmiştir. Soğukta ilk çalıştırmada içten yanmalı motorun sıcaklık ve basınç durumları dikkate alınarak nümerik analizler yapılmıştır. Bu parametrelerin buharlaşma hızı, penetrasyon, püskürtme morfolojisi, yakıt püskürtme açısı ve Sauter Ortalama Çapı üzerindeki etkileri ele alınmıştır. N-heptan yakıtı kullanılmış ve Kelvin-Helmholtz / Rayleigh-Taylor ayrılma modeli benimsenmiştir. Analizler, Fluent yazılımı ile kapsamlı olarak gerçekleştirilmiştir. Sonuçların literatürde yer alan deneysel verilerle uyum içinde olduğu görülmüştür. Artan ortam basıncı vorteks oluşumunu şiddetlendirmiş, yakıt nüfuziyet derinliğini azaltmış ve daha kompakt bir yakıt demeti oluşturarak yakıt püskürtme açısını azaltmıştır. Ayrıca, sıcaklık parametresinin buharlaşma üzerindeki etkisinin basınç parametresinden daha az etkili olduğu tespit edilmiştir.

Keywords

• püskürtme atomizasyonu ve karakteristiği,karışım oluşumu,içi boş koni püskürtme,KH-RT

References

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