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

Year 2019, Volume: 24 Issue: 2, 185 - 202, 30.08.2019

İbrahim Taş , Mehmet İhsan Karamangil

https://doi.org/10.17482/uumfd.532535

Cited By: 2

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

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