Publication: Otosan Nhdd Motorunda 3-boyutlu Sad Programı Kıva3v Yardımıyla Hava Hareketlerinin Modellenmesi
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Otomotiv
Automotive
Automotive
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Fen Bilimleri Enstitüsü
Institute of Science and Technology
Institute of Science and Technology
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Abstract
Bu çalışmada, çok boyutlu hava hareketlerinin oluşumu, swirl ve belli bir motordaki yanma analiz edilmiştir. Akışkanlar dinamiği, türbülans, kimyasal reaksyon, damlacık parçalanma, çarpışma, buharlaşma modelleri kullanılarak spray yanma için model oluşturulmuştur. Literatürdeki değişik yanma modelleri araştırılmıştır. Mesh yapısı ICEM-CFD programı kullanılarak oluşturulmuştur. Diesel yakıt demeti yanma modeli için en uygun model olan kısmi karışımlı yanma modeli bu çalışmada kullanılmıştır. Yanma için 68 bileşen ve 291 reaksyondan oluşan detaylı yanma mekanizması kullanılmıştır. Soğuk akış ve gerçek diesel motor modelleri KIVA 3V kodu ile çözülmüştür. Yanma sonuçları, imalatçıdan elde edilen deney sonuçları ile karşılaştırılmıştır.
In this study multi-dimensional air motion formations, swirl and combustion in a specific engine are analyzed. The models of fluid dynamics, turbulence, chemical reactions, droplet break-up, collision, evaporation were used to produce numerical model of spray combustion. Different combustion models which are used in the literature are investigated. ICEM -CFD was used to generate the mesh structure. The Partially Stirred Reactor model (PaSR) of which results are the most appropriate for diesel engine is commonly used in this study. Reduced complex mechanism which consists of 68 species and 291 reactions is used for combustion model. The cold flow models and real diesel engine models were solved by KIVA 3V Code. Combustion results are compared to the experimental values obtained from the engine manufacturer.
In this study multi-dimensional air motion formations, swirl and combustion in a specific engine are analyzed. The models of fluid dynamics, turbulence, chemical reactions, droplet break-up, collision, evaporation were used to produce numerical model of spray combustion. Different combustion models which are used in the literature are investigated. ICEM -CFD was used to generate the mesh structure. The Partially Stirred Reactor model (PaSR) of which results are the most appropriate for diesel engine is commonly used in this study. Reduced complex mechanism which consists of 68 species and 291 reactions is used for combustion model. The cold flow models and real diesel engine models were solved by KIVA 3V Code. Combustion results are compared to the experimental values obtained from the engine manufacturer.
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Tez (Yüksek Lisans) -- İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, 2004
Thesis (M.Sc.) -- İstanbul Technical University, Institute of Science and Technology, 2004
Thesis (M.Sc.) -- İstanbul Technical University, Institute of Science and Technology, 2004
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İTÜ theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission.
İTÜ theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission.
Keywords
Çok boyutlu motor modelleme, Swirl, KIVA3V, Karışım, Multi-dimensional engine modeling, Swirl, KIVA3V, Mixture
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