BUJİ ATEŞLEMELİ HİDROJEN MOTORUNDA KARIŞIM ORANI VE ATEŞLEME AVANSININ MOTOR PERFORMANSINA VE ÇEVRİMLER ARASI FARKA ETKİSİNİN DENEYSEL ARAŞTIRILMASI

Öz

Bu çalışmada, yakıt olarak hidrojeni kullanan buji ateşlemeli bir motorda ekivalans oranı ve ateşleme avansının motor performansına ve çevrimler arası farka etkisi araştırılmıştır. Çalışmada; tek silindirli, 4 zamanlı, L tipi silindir kafasına sahip buji ateşlemeli bir motor kullanılmıştır. Motor 1500 d/d sabit devirde, iki farklı yakıt-hava ekivalans oranında (φ = 0,3 ve φ = 0,6) ve farklı ateşleme avanslarında çalıştırılmıştır. Motor performans parametrelerinin tespitinde silindir içi basıncın krank açısına bağlı değişim verileri kullanılmıştır. Basınç verilerinin analizi neticesinde ortalama indike basınç, indike motor gücü, indike motor momenti, indike termik verim, indike özgül yakıt tüketimi ve yanmış kütle oranı değerleri hesaplanmıştır.Elde edilen sonuçlar, fakir karışım halinde yakıt-hava oranının artmasıyla, volümetrik verim ve indike termik verimdeki azalmaya rağmen, indike motor gücünün arttığı ve aynı zamanda çevrimler arası farkın azaldığını göstermiştir. Çevrimler arası farkın ise, büyük oranda alev gelişim açısından kaynaklandığı tespit edilmiştir.

Anahtar Kelimeler

• Hidrojen, Hava-yakıt oranı, Ateşleme avansı, Motor Performansı, Çevrimler arası fark.

Kaynakça

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