JEMS Maritime Sci. 2017; 5(4): 314-321 | DOI: 10.5505/jems.2017.52824

Investigation of the Effects of Piston Geometry and Combustion Process Parameters on Engine Performance of Methane Fuelled Compression Ignition Engines with Kriging Method

Halil Saraçoðlu, Oðuz Salim Söðüt
Istanbul Technical University.faculty Of Naval Architecture And Ocean Engineering. Istanbul

In this study, the effects of piston geometry and combustion process parameters on the performance of methane burned dual fuel engines were investigated. For this purpose, three-dimensional computational fluid dynamics-based simulation modelling is combined with method of Design of Experiments (DOE) and Kriging metamodeling. AVL Fire 3-D CFD software was used in the modelling of dual fuel engine. Through the DOE method of Latin Hypercube Sampling efficient sampling points were determined in 6 dimentional parameter space. By Kriging metamodel, sufficient prediction results were obtained about the effect of piston geometry and combustion process parameters on engine performance. It has been found out that the proposed surrogate model is consistent with other approaches in the literature. Furthermore, it has been speculated that the results of this study will contribute to methane fuelled compression ignition engine studies related to performance enhancement.

Keywords: Methane, Compression Ignition Engine, Latin Hypercube Sampling, Kriging Metamodel, Engine Performance

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Metan Yakýtlý Sýkýþtýrmalý Ateþlemeli Motorlarda Piston Geometrisi ve Yanma Süreci Parametrelerinin Motor Performansýna Etkilerinin Kriging Yöntemiyle Ýncelenmesi

Halil Saraçoðlu, Oðuz Salim Söðüt
Ýstanbul Teknik Üniversitesi. Gemi Ýnþaatý Ve Deniz Bilimleri Fakültesi. Ýstanbul

Yapýlan çalýþmada, metan yakýlan çift yakýtlý bir motorda piston geometrisi ve yanma süreci parametrelerinin motor performansýna etkileri incelenmiþtir. Bu amaç doðrultusunda üç boyutlu hesaplamalý akýþkanlar dinamiði temelli motor modellemesi, Deney Tasarýmý metodu ve Kriging metamodelleme ile birleþtirildi. Sýkýþtýrmalý ateþlemeli motorunun modellenmesinde AVL Fire HAD yazýlýmý kullanýlmýþtýr. Deney Tasarýmý metodu olan Latin Hiperküp Örnekleme vasýtasýyla 6 boyutlu parametre uzayýnda verimli örneklem noktalarý belirlendi. Kriging yöntemiyle, piston geometrisi ve yanma süreci parametrelerinin motor performansýna etkisini açýklayan yeterli tahmin bilgileri elde edildi. Önerilen vekil modelin literatürde diðer yaklaþýmlarla uyumlu sonuçlar verdiði belirlenmiþtir. Ayrýca bu çalýþmanýn sonuçlarýnýn, performansýn artýrýlmasýyla ilgili metan yakýtlý sýkýþtýrmalý ateþlemeli motor çalýþmalarýna katkýsý olacaðý deðerlendirilmektedir.

Anahtar Kelimeler: Metan, Sýkýþtýrmalý Ateþlemeli Motor, Latin Hyperküp Örnekleme, Kriging Metamodel, Motor Performansý

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