BibTex RIS Kaynak Göster

Bir Metan Yakıtlı CAI Motor üzerinde EGR ve Aşırı Hava Oranı Etkilerinin Hesaplamalı Çalışması

Yıl 2015, Cilt: 4 Sayı: 3, 152 - 161, 07.10.2015
https://doi.org/10.18245/ijaet.17947

Öz

Bu
kağıt metan yakıt kullanarak kontrollü otomatik ateşleme (CAI),
dört zamanlı, tek silindirli motor, sayısal analizini sunmaktadır.
Bu çalışmanın amacı gazı devridaim (EGR) oranı yanma, emisyon
ve motor performansı nasıl etkilediğini egzoz belirlemektir. EGR
oranları% 27,% 32,% 37 ve 1,0, 1,5, 2,0 ve 2,5 fazla hava oranlı
kütleye göre% 42 olarak seçilmiştir. 570 K bir de silindir
sıcaklığı emme valfi kapanış saati (IVC) kabul edildi ve 1500
rpm motor devir Tüm olgularda kullanıldı. Hesaplamalı Akışkanlar
Dinamiği (CFD) kodu Fluent sayısal analiz için kullanılmıştır.
Sayısal modelleme Renormalizasyon Grubu Teorisi (RNG) k-
modeli kullanılarak, dikkate türbülans etkisi alarak çözüldü.




Sonuçları-silindir
basınç, sıcaklık, ısı salınım oranı, basınç yükselme
hızı, yanma süresi, fren çalışmaları, belirli NOx ve CO
emisyonları, ısıl verim ve özgül yakıt tüketimi üzerinde
önemli etkilere sahip EGR oranı ve aşırı hava oranının bu
artışa işaret etmektedir. Ayrıca, CAI yanma
EGR oranı fazla hava oranının düşük seviye (% 32 kadar) oldu
(basınç yükselme hızı, yüksek sıcaklık değeri ve yüksek
düzeyde snox emisyon artışa yol açmaktadır hızlı ısı salım
oranı sonuçlandı 1 ve 1,5) değer. Düşük düzeyde snox emisyonu
ile sonuçlanan CAI yanma elde etmek için, karışım fazla% 32 EGR
oranını içeren veya yalın haline gelmelidir.

Kaynakça

  • T.Chen, H. Xie, L.Li, L.Zhang, X.Wang, H.Zhao,“Methods to achieve HCCI/CAI combustion at idle operation in a 4VVAS gasoline engine,” Applied Energy., 2014 (116):41-51
  • Zhao H. Motivation definition and history of HCCI/CAI engines. In: Zhao H, editor. HCCI and CAI Engines for the Automotive Industry. Woodhead Publishing Limited; 2007.
  • N. Kalian, H. Zhao, J. Qiao, “Investigation of transition between spark ignition and controlled auto-ignition combustion in a V6 direct-injection engine with cam profile switching,” Automobile Engineering Journal., 2008(222):1911-26.
  • G.Cho, G.Moon, D.Jeong, C. Bae, “Effects of internal exhaust gas recirculation on controlled auto-ignition in methane engine combustion,” Fuel., 2009(88):1042-48.
  • C.H. Lee, K.H. Lee, “An experimental study of the combustion characteristics in SCCI and CAI based on direct-injection gasoline engine,” Experimental Thermal and Fluid Science, 2006(31):1121-32.
  • J.Hunicz, P. Kordos, “An experimental study of fuel injection strategies in CAI gasoline engines,” Experimental Thermal and Fluid Science., 2010 (35):243-52.
  • Y.Bai, Z. Wang,J. Wang, “Part–load characteristics of direct injection spark ignition engine using exhaust gas trap,” Applied Energy., 2010(87):2640-46.
  • P.G. Aleiferis, M.F. Rosati, “Controlled auto ignition of hydrogen in a direct injection optical engine,” Combustion and Flame.,2012(159): 2500-15.
  • L.Shi, K. Deng, Y. Cui, S. Qu, W. Hu, “Study on knocking combustion in a diesel HCCI engine with fuel injection in negative valve overlap,” Fuel., 106(2013): 478-483.
  • L. Cao, H. Zhao, X. Jiang, “Analysis of controlled auto-ignition/HCCI combustion in direct injection engine with single and split fuel injections,” Combustion Science and Technology., 2007(180)176-205.
  • Zhao H. Overview of CAI/HCCI gasoline engines. In: Zhao H, editor. HCCI and CAI Engines for the Automotive Industry. Woodhead Publishing Limited; 2007.
  • D.Yap,J. Karlovsky, A. Megaritis, M.L. Wyszynski, H. Xu, “An investigation into propane homogeneous charge compression (HCCI) engine operation with residual gas trapping,” Fuel, 84(2005): 2372-79.
  • J. Li, H. Zhao, N. Ladommatos, “Performance and analysis of a four-stroke multicylinder gasoline engine with CAI combustion,” SAE Paper. 2001-01- 3608.
  • M.Fathi, R.K. Saray, M.D. Checkel, “The influence of exhaust gas recirculation (EGR) on combustion and emissions of n-heptane/natural gas fueled homogeneous charge compression ignition (HCCI) engines,” Applied Energy., 2011(88)4719-24.
  • M. Ghorbanpour, R.A. Rasekhi, “A parametric investigation of HCCI combustion to reduce emissions and improve efficiency using a CFD model approach,” Fuel., 106(2013): 157-165.
  • R.Chen, N.Milovanovic, “A computational study into the effect of exhaust gas recycling on homogeneous charge compression ignition combustion in internal combustion engine fuelled with methane,” International Journal of Thermal Sciences.,2002(41) 805-13.
  • Fluent 6.3 User’s Guide, 2006. Fluent Incorporated, Centerra Resource Park, 10. Cavendish Court,Lebanon, NH 03766,USA.
  • Johansen, L. C. R. Rans Simulation of Oxy-Natural Gas Combustion. Aalborg University, M.S. Thesis, Denmark, 2010.
  • G.M.Kosmadakis,C.D.Rakopoulos, .Demuynck, M.D.Paepe, S.Verhelst, “ CFD modeling and experimental study of combustion and nitric oxide emissions in hydrogen-fueled spark ignition engine in very wide range of EGR rates” Hydrogen Energy., 37 (2012):10917-34.
  • R.K. Maurya, A.K. Agarwal, “Experimental investigation on effect of intake air temperature and air-fuel ratio on cycle-to-cycle variations of HCCI combustion and performance,” Applied Energy, 2011(88)1153-63.
  • Stone R. Introduction to Internal Combustion Engines, Third Edition. Society of Automotive Engineers Inc., Warrendale, 641 pp, 1999.
  • M. Yao, Z. Zheng, H. Liu, “Progress and recent trend in homogeneous charge compression ignition(HCCI) engines,” Progress in Energy and Combustion Science., 2009; 35: 398-437.

Computational Study of EGR and Excess Air Ratio Effects on a Methane Fueled CAI Engine

Yıl 2015, Cilt: 4 Sayı: 3, 152 - 161, 07.10.2015
https://doi.org/10.18245/ijaet.17947

Öz

This paper presents the numerical analysis of a controlled auto ignition (CAI), four stroke, single cylinder engine, by using methane fuel. The goal of this study was to determine how exhaust gas recirculation (EGR) rate affects combustion, emission and engine performance. The EGR rates were selected as 27 %, 32 %, 37 %, and 42 % by mass with excess air ratios of 1.0, 1.5, 2.0, and 2.5. An in-cylinder temperature of 570 K was considered at intake valve closing time (IVC) and an engine speed of 1500 rpm was used for all cases. The Computational Fluid Dynamics (CFD) code FLUENT was used for numerical analysis. The numerical modeling was solved by taking into consideration the effect of turbulence, by using the Renormalization Group Theory (RNG) k- model.
The results indicate that increase in EGR rate and excess air ratio have significant effects on in-cylinder pressure, temperature, heat release rate, pressure rise rate, combustion duration, brake work, specific NOx and CO emissions, thermal efficiency and specific fuel consumption. Moreover, CAI combustion resulted in a rapid heat release rate which gives rise to an increase in the pressure rise rate, high temperature value and high level SNOx emission, when EGR rate was low level (up to 32 %) for excess air ratio() value of 1 and 1.5. To achieve CAI combustion resulting in low level SNOx emission, the mixture must include an EGR rate of more than 32 % or become leaner.

Kaynakça

  • T.Chen, H. Xie, L.Li, L.Zhang, X.Wang, H.Zhao,“Methods to achieve HCCI/CAI combustion at idle operation in a 4VVAS gasoline engine,” Applied Energy., 2014 (116):41-51
  • Zhao H. Motivation definition and history of HCCI/CAI engines. In: Zhao H, editor. HCCI and CAI Engines for the Automotive Industry. Woodhead Publishing Limited; 2007.
  • N. Kalian, H. Zhao, J. Qiao, “Investigation of transition between spark ignition and controlled auto-ignition combustion in a V6 direct-injection engine with cam profile switching,” Automobile Engineering Journal., 2008(222):1911-26.
  • G.Cho, G.Moon, D.Jeong, C. Bae, “Effects of internal exhaust gas recirculation on controlled auto-ignition in methane engine combustion,” Fuel., 2009(88):1042-48.
  • C.H. Lee, K.H. Lee, “An experimental study of the combustion characteristics in SCCI and CAI based on direct-injection gasoline engine,” Experimental Thermal and Fluid Science, 2006(31):1121-32.
  • J.Hunicz, P. Kordos, “An experimental study of fuel injection strategies in CAI gasoline engines,” Experimental Thermal and Fluid Science., 2010 (35):243-52.
  • Y.Bai, Z. Wang,J. Wang, “Part–load characteristics of direct injection spark ignition engine using exhaust gas trap,” Applied Energy., 2010(87):2640-46.
  • P.G. Aleiferis, M.F. Rosati, “Controlled auto ignition of hydrogen in a direct injection optical engine,” Combustion and Flame.,2012(159): 2500-15.
  • L.Shi, K. Deng, Y. Cui, S. Qu, W. Hu, “Study on knocking combustion in a diesel HCCI engine with fuel injection in negative valve overlap,” Fuel., 106(2013): 478-483.
  • L. Cao, H. Zhao, X. Jiang, “Analysis of controlled auto-ignition/HCCI combustion in direct injection engine with single and split fuel injections,” Combustion Science and Technology., 2007(180)176-205.
  • Zhao H. Overview of CAI/HCCI gasoline engines. In: Zhao H, editor. HCCI and CAI Engines for the Automotive Industry. Woodhead Publishing Limited; 2007.
  • D.Yap,J. Karlovsky, A. Megaritis, M.L. Wyszynski, H. Xu, “An investigation into propane homogeneous charge compression (HCCI) engine operation with residual gas trapping,” Fuel, 84(2005): 2372-79.
  • J. Li, H. Zhao, N. Ladommatos, “Performance and analysis of a four-stroke multicylinder gasoline engine with CAI combustion,” SAE Paper. 2001-01- 3608.
  • M.Fathi, R.K. Saray, M.D. Checkel, “The influence of exhaust gas recirculation (EGR) on combustion and emissions of n-heptane/natural gas fueled homogeneous charge compression ignition (HCCI) engines,” Applied Energy., 2011(88)4719-24.
  • M. Ghorbanpour, R.A. Rasekhi, “A parametric investigation of HCCI combustion to reduce emissions and improve efficiency using a CFD model approach,” Fuel., 106(2013): 157-165.
  • R.Chen, N.Milovanovic, “A computational study into the effect of exhaust gas recycling on homogeneous charge compression ignition combustion in internal combustion engine fuelled with methane,” International Journal of Thermal Sciences.,2002(41) 805-13.
  • Fluent 6.3 User’s Guide, 2006. Fluent Incorporated, Centerra Resource Park, 10. Cavendish Court,Lebanon, NH 03766,USA.
  • Johansen, L. C. R. Rans Simulation of Oxy-Natural Gas Combustion. Aalborg University, M.S. Thesis, Denmark, 2010.
  • G.M.Kosmadakis,C.D.Rakopoulos, .Demuynck, M.D.Paepe, S.Verhelst, “ CFD modeling and experimental study of combustion and nitric oxide emissions in hydrogen-fueled spark ignition engine in very wide range of EGR rates” Hydrogen Energy., 37 (2012):10917-34.
  • R.K. Maurya, A.K. Agarwal, “Experimental investigation on effect of intake air temperature and air-fuel ratio on cycle-to-cycle variations of HCCI combustion and performance,” Applied Energy, 2011(88)1153-63.
  • Stone R. Introduction to Internal Combustion Engines, Third Edition. Society of Automotive Engineers Inc., Warrendale, 641 pp, 1999.
  • M. Yao, Z. Zheng, H. Liu, “Progress and recent trend in homogeneous charge compression ignition(HCCI) engines,” Progress in Energy and Combustion Science., 2009; 35: 398-437.
Toplam 22 adet kaynakça vardır.

Ayrıntılar

Birincil Dil İngilizce
Konular Mühendislik
Bölüm Article
Yazarlar

Melih Yıldız

S. Akansu

Bilge Çeper

Yayımlanma Tarihi 7 Ekim 2015
Gönderilme Tarihi 7 Ekim 2015
Yayımlandığı Sayı Yıl 2015 Cilt: 4 Sayı: 3

Kaynak Göster

APA Yıldız, M., Akansu, S., & Çeper, B. (2015). Computational Study of EGR and Excess Air Ratio Effects on a Methane Fueled CAI Engine. International Journal of Automotive Engineering and Technologies, 4(3), 152-161. https://doi.org/10.18245/ijaet.17947
AMA Yıldız M, Akansu S, Çeper B. Computational Study of EGR and Excess Air Ratio Effects on a Methane Fueled CAI Engine. International Journal of Automotive Engineering and Technologies. Kasım 2015;4(3):152-161. doi:10.18245/ijaet.17947
Chicago Yıldız, Melih, S. Akansu, ve Bilge Çeper. “Computational Study of EGR and Excess Air Ratio Effects on a Methane Fueled CAI Engine”. International Journal of Automotive Engineering and Technologies 4, sy. 3 (Kasım 2015): 152-61. https://doi.org/10.18245/ijaet.17947.
EndNote Yıldız M, Akansu S, Çeper B (01 Kasım 2015) Computational Study of EGR and Excess Air Ratio Effects on a Methane Fueled CAI Engine. International Journal of Automotive Engineering and Technologies 4 3 152–161.
IEEE M. Yıldız, S. Akansu, ve B. Çeper, “Computational Study of EGR and Excess Air Ratio Effects on a Methane Fueled CAI Engine”, International Journal of Automotive Engineering and Technologies, c. 4, sy. 3, ss. 152–161, 2015, doi: 10.18245/ijaet.17947.
ISNAD Yıldız, Melih vd. “Computational Study of EGR and Excess Air Ratio Effects on a Methane Fueled CAI Engine”. International Journal of Automotive Engineering and Technologies 4/3 (Kasım 2015), 152-161. https://doi.org/10.18245/ijaet.17947.
JAMA Yıldız M, Akansu S, Çeper B. Computational Study of EGR and Excess Air Ratio Effects on a Methane Fueled CAI Engine. International Journal of Automotive Engineering and Technologies. 2015;4:152–161.
MLA Yıldız, Melih vd. “Computational Study of EGR and Excess Air Ratio Effects on a Methane Fueled CAI Engine”. International Journal of Automotive Engineering and Technologies, c. 4, sy. 3, 2015, ss. 152-61, doi:10.18245/ijaet.17947.
Vancouver Yıldız M, Akansu S, Çeper B. Computational Study of EGR and Excess Air Ratio Effects on a Methane Fueled CAI Engine. International Journal of Automotive Engineering and Technologies. 2015;4(3):152-61.