Geliştirilmiş Delikli Tip Brülör Kullanılarak NH3 Bazlı Yakıtların Yanma Özelliklerinin Belirlenmesi

Öz

Bu çalışmada, geliştirilmiş bir brülör kullanılarak amonyak bazlı yakıtların yanma davranışını araştırılmaktadır. Bu kapsamda, hidrojen ve metan gazları farklı kütle oranlarında ayrı ayrı amonyak gazına eklenmiş ve Hesaplamalı Akışkanlar Dinamiği (CFD) kodu kullanılarak sayısal olarak analiz edilmiştir. Ön karışımsız simülasyonlar için PDF/Mixture yanma modeli ve termal-NOx kullanılmıştır. Radyasyon modeli olarak P-1 modeli kullanılmıştır. Elde edilen sıcaklık, NOx emisyonu ve H2O mol oranı sonuçları, %100 NH3 yanma durumuyla karşılaştırılarak sunulmuştur. En yüksek sıcaklık değeri olan 1600K, %100 NH3 durumunda elde edilmiştir. NH3'e H2 ve CH4 eklenmesiyle daha düşük sıcaklıklar elde edilmiştir. Özellikle, reaksiyon bölgesinde, NH3/H2 yakıt karışımının ulaştığı en yüksek sıcaklık, NH3/CH4 yakıt karışımına göre yaklaşık 200 K daha yüksek olmuştur. Benzer şekilde, NH3'e H2 ve CH4 eklenmesi, NOx ve H2O mol oranını azaltmıştır. NH3/H2 yakıt karışımında elde edilen NOx ve H2O mol kesri değerleri, NH3/CH4 yakıt karışımında elde edilen değerlerden daha yüksektir.

Anahtar Kelimeler

• CFD
• Amonyak
• Hidrojen
• Metan
• Yanma ve Yakma
• Emisyon

Combustion Characteristics of NH3-Based Fuels Using Improved Perforated-Type Burner

Öz

This study investigates the combustion behavior of ammonia-based fuels using an advanced burner. Within this context, hydrogen and methane have been added to NH3 separately in different mass fractions and numerically analyzed using Computational Fluid Dynamics (CFD) code. The PDF/Mixture combustion model and thermal-Nox have been used for non-premixed simulations. P-1 model has been used as radiation model. The results obtained for temperature, NOx emission, and H2O mole fraction are presented in comparison with 100% NH3 combustion case. The highest temperature value of 1600K was obtained with 100% NH3 case. Lower temperatures were obtained with the H2 and CH4 addition to NH3. Specifically, in the reaction zone, the highest temperature reached by the NH3/H2 fuel blend was approximately 200 K higher than NH3/CH4 fuel blend. Similarly, the addition of H2 and CH4 to NH3 reduced NOx and H2O mole fraction. The NOx and H2O mole fraction values achieved in the NH3/H2 fuel blend have higher values than those obtained in the NH3/CH4 fuel blend.

Anahtar Kelimeler

• Combustion
• CFD
• Ammonia
• Hydrogen
• Methane
• Emissions

Destekleyen Kurum

National Defense University

Etik Beyan

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Teşekkür

Authors gratefully acknowledges National Defense University for its support.

Kaynakça

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