Numerical analysis of the effect of conical turbulators to heat transfer performance of a liquid fuelled boiler

NAMLI, LÜTFÜ; OZCAN, HAKAN; SUNGUR, BİLAL; TOPALOGLU, Bahattin

Numerical analysis of the effect of conical turbulators to heat transfer performance of a liquid fuelled boiler

Bilal SUNGUR, (Department of Mechanical Engineering, Ondokuz Mayis University, Samsun, Turkey)

Bahattin TOPALOĞLU, (Department of Mechanical Engineering, Ondokuz Mayis University, Samsun, Turkey)

Hakan ÖZCAN, (Department of Mechanical Engineering, Ondokuz Mayis University, Samsun, Turkey)

Lütfü NAMLI (Department of Mechanical Engineering, Ondokuz Mayis University, Samsun, Turkey)

Research on Engineering Structures and Materials

2 0

Yıl: 2018 Cilt: 4 Sayı: 2 Sayfa Aralığı: 127 - 136 Metin Dili: İngilizce İndeks Tarihi: 28-10-2019

Numerical analysis of the effect of conical turbulators to heat transfer performance of a liquid fuelled boiler

Öz:

In this study, increasing the efficiency of liquid fuelled smoke tube boilers used for domestic heating was researched. In this context, turbulators with conical geometries placed to smoke tubes of boiler and effects on flame structure and heat transfer were investigated numerically. Calculations were carried out at two dimensional axisymmetric conditions and Fluent was used as the computational fluid dynamics software. In all cases, the standard k-ε model was used for modeling the turbulent flow and the species transport model was used for modeling the combustion. Based on the results of these turbulators were evaluated for each condition. Besides, temperature and stream function distribution and pressure drop were investigated according to the arrangement of turbulators and which number of turbulator would be the most appropriate at boilers was discussed. Increasing the number of turbulators from zero to three decreased the exhaust temperatures 15 K from 365 K to 350 K, and consequently the efficiency of the boiler was increased. Yet the turbulators inserted into smoke tube increased the pressure losses insignificantly from 20 to 23.5 Pa.

Anahtar Kelime:

Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık

Muthusamy C, Vivar M, Skryabin I, and Srithar K. Effect of conical cut-out turbulators with internal fins in a circular tube on heat transfer and friction factor. International Communications in Heat and Mass Transfer, 2013; 44: 64-68. https://doi.org/10.1016/j.icheatmasstransfer.2013.03.004
Yakut K and Sahin B. The Effects of Vortex Characteristics on Performance of Coiled Wire Turbulators Used for Heat Transfer Augmentation. Applied Thermal Engineering, 2004; 24: 2427–2438. https://doi.org/10.1016/j.applthermaleng.2004.03.008
Kahraman N, Sekmen U, Çeper B, and Akansu SO. Boru içi akışlarda türbülatörlerin ısı transferine olan etkisinin sayısal incelenmesi. Isı Bilimi ve Tekniği Dergisi, 2008; 28: 51-59. [
Akansu SO. Heat transfer and pressure drops for porous-ring turbulators in a circular pipe. Applied Energy, 2006; 83: 280-298. https://doi.org/10.1016/j.apenergy.2005.02.003
Karakaya H and Durmuş A. Heat transfer and exergy loss in conical spring turbulators. International Journal of Heat and Mass Transfer, 2013; 60:756-762. https://doi.org/10.1016/j.ijheatmasstransfer.2013.01.054
Saario A, Rebola A, Coelho PJ, Costa M, and Oksanen A. Heavy fuel oil combustion in a cylindrical laboratory furnace: measurements and modelling. Fuel, 2005; 84: 359–369. https://doi.org/10.1016/j.fuel.2004.10.002
Hu D. Comparison of numerical and experimental results of four liquid spray combustors, Master Thesis, Louisiana State University The Department of Mechanical Engineering, USA, 2002.
Ing N.L., Jaafar M.N.M., Ishak M.S.A., Arizal M.A.A., 2010. Spray characteristic of palm biofuel blends, International Journal of Mechanical and Materials Engineering, 5, 214221
Ilbas M, Yılmaz İ, Veziroglu T.N., Kaplan Y., 2005. Hydrohen as burner fuel: modeling of hydrogen-hydrocarbon composite fuel combustion and NOx formation in a small burner. International Journal of Energy Research, 2005; 29: 973-990. https://doi.org/10.1002/er.1104
FLUENT, Fluent User's Guide, Fluent Incorporated, Lebanon, NH. 2006.
Sungur B, Topaloglu B, Ozcan H. Effects of nanoparticle additives to diesel on the combustion performance and emissions of a flame tube boiler. Energy, 2016; 113: 4451. https://doi.org/10.1016/j.energy.2016.07.040

APA	SUNGUR B, TOPALOGLU B, OZCAN H, NAMLI L (2018). Numerical analysis of the effect of conical turbulators to heat transfer performance of a liquid fuelled boiler. , 127 - 136.
Chicago	SUNGUR BİLAL,TOPALOGLU Bahattin,OZCAN HAKAN,NAMLI LÜTFÜ Numerical analysis of the effect of conical turbulators to heat transfer performance of a liquid fuelled boiler. (2018): 127 - 136.
MLA	SUNGUR BİLAL,TOPALOGLU Bahattin,OZCAN HAKAN,NAMLI LÜTFÜ Numerical analysis of the effect of conical turbulators to heat transfer performance of a liquid fuelled boiler. , 2018, ss.127 - 136.
AMA	SUNGUR B,TOPALOGLU B,OZCAN H,NAMLI L Numerical analysis of the effect of conical turbulators to heat transfer performance of a liquid fuelled boiler. . 2018; 127 - 136.
Vancouver	SUNGUR B,TOPALOGLU B,OZCAN H,NAMLI L Numerical analysis of the effect of conical turbulators to heat transfer performance of a liquid fuelled boiler. . 2018; 127 - 136.
IEEE	SUNGUR B,TOPALOGLU B,OZCAN H,NAMLI L "Numerical analysis of the effect of conical turbulators to heat transfer performance of a liquid fuelled boiler." , ss.127 - 136, 2018.
ISNAD	SUNGUR, BİLAL vd. "Numerical analysis of the effect of conical turbulators to heat transfer performance of a liquid fuelled boiler". (2018), 127-136.

APA	SUNGUR B, TOPALOGLU B, OZCAN H, NAMLI L (2018). Numerical analysis of the effect of conical turbulators to heat transfer performance of a liquid fuelled boiler. Research on Engineering Structures and Materials, 4(2), 127 - 136.
Chicago	SUNGUR BİLAL,TOPALOGLU Bahattin,OZCAN HAKAN,NAMLI LÜTFÜ Numerical analysis of the effect of conical turbulators to heat transfer performance of a liquid fuelled boiler. Research on Engineering Structures and Materials 4, no.2 (2018): 127 - 136.
MLA	SUNGUR BİLAL,TOPALOGLU Bahattin,OZCAN HAKAN,NAMLI LÜTFÜ Numerical analysis of the effect of conical turbulators to heat transfer performance of a liquid fuelled boiler. Research on Engineering Structures and Materials, vol.4, no.2, 2018, ss.127 - 136.
AMA	SUNGUR B,TOPALOGLU B,OZCAN H,NAMLI L Numerical analysis of the effect of conical turbulators to heat transfer performance of a liquid fuelled boiler. Research on Engineering Structures and Materials. 2018; 4(2): 127 - 136.
Vancouver	SUNGUR B,TOPALOGLU B,OZCAN H,NAMLI L Numerical analysis of the effect of conical turbulators to heat transfer performance of a liquid fuelled boiler. Research on Engineering Structures and Materials. 2018; 4(2): 127 - 136.
IEEE	SUNGUR B,TOPALOGLU B,OZCAN H,NAMLI L "Numerical analysis of the effect of conical turbulators to heat transfer performance of a liquid fuelled boiler." Research on Engineering Structures and Materials, 4, ss.127 - 136, 2018.
ISNAD	SUNGUR, BİLAL vd. "Numerical analysis of the effect of conical turbulators to heat transfer performance of a liquid fuelled boiler". Research on Engineering Structures and Materials 4/2 (2018), 127-136.