مطالعه عددی تاثیر ایجاد شیار درون نازل افشانه بر رفتار فواره سوخت های موتور دیزل و بیودیزل

نوع مقاله : مقاله پژوهشی

نویسندگان

1 عضو هیات علمی / دانشکده مهندسی مکانیک، دانشگاه امام علی (ع)،

2 دانشجوی کارشناسی ارشد / دانشکده مهندسی مکانیک، دانشگاه بین المللی امام خمینی (ره) قزوین

چکیده

در این پژوهش به­ بررسی رفتار پاشش سوخت دیزل و بیودیزل در یک محفظه احتراق استوانه­ای حجم ثابت برای سوراخ نازل دارای شیار به­منظور بهبود خواص فواره سوخت و عملکرد موتور دیزل با کمک دینامیک سیالات محاسباتی پرداخته شده است. بدین­منظور خصوصیات ماکروسکوپیک و میکروسکوپیک فواره سوخت دیزل و بیودیزل برای هندسه­ سوراخ نازل ایجاد شده به­صورت عددی و به کمک نرم­افزارهای ای وی ال فایر و متلب مدل­سازی و مورد تحلیل قرار گرفته است. ابتدا جریان سوخت مایع درون افشانه دارای سوراخ نازل استوانه­ای و مخروطی همگرا مدل­سازی شده و در ادامه از سوخت دیزل و بیودیزل در سوراخ نازل دارای شیار استفاده شده است. نتایج عددی حاصل نشان می­دهند که در این حالت بیودیزل دارای طول نفوذ کمتر و قطر ذرات و زاویه مخروطی فواره بیشتری می­باشد. بنابراین خصوصیات ماکروسکوپیک و میکروسکوپیک فواره سوخت­های مختلف با ایجاد شیار می­توانند بهبود یافته و کنترل شوند. نتایج عددی و داده­های تجربی در تحقیقات پیشین اعتبارسنجی شده­اند.

کلیدواژه‌ها


عنوان مقاله [English]

Numerical investigation on the effect of creating grooves inside the injector nozzle on the diesel and biodiesel engine fuels spray behavior

نویسندگان [English]

  • Amirhamzeh Farajollahi 1
  • reza firuzi 2
1 Assistant Professor, Mechanical Engineering Department, Imam Ali university
2 MSc Student, Mechanical Engineering Department, Imam Khomeini International University
چکیده [English]

In this study, spray behavior of diesel and biodiesel fuel in a cylinderical fixed volume combustion chamber for a grooved nozzle hole has been investigated using CFD in order to improving the fuel spray characteristics and diesel engine performance. To this end, microscopic and macroscopic diesel and biodiesel fuel spray characteristics are modeled and investigated using AVL-Fire and Matlab software. Firstly, the liquid fuel flow inside the injector with cylindrical and converged conical nozzle holes have been modeled and then in the following diesel and biodiesel fuels have been used in the grooved nozzle hole.   Numerical results show that in this case, biodiesel spray has smaller penetration length and bigger cone angle and SMD. Thus spray macroscopic and microscopic characteristics can be improved and controlled for different fuels by creating grooves inside the nozzle hole. Numerical results and experimental data was validated from previous researches.

کلیدواژه‌ها [English]

  • Injector nozzle hole
  • groove
  • diesel
  • biodiesel
  • spray
[1] J. B. Heywood, Internal Combustion Engine Fundamentals, McGraw-Hill, Inc., New York, 1998.
[2] S. M. Sapuan, H. H. Masjuki, and A. Azlan, The use of palm oil as diesel fuel substitute. Proc Inst Mech Engrs Part A J Power Energy, Vol. 210, pp. 47-53, 1996.
[3] S. Murillo, J. Miguez, L. J. Porteiro, E. Granada, and J. C. Moran, Performance and exhaust emissions in the use of biodiesel in outboard diesel engines. Fuel, Vol. 86, pp.1765-1771, 2007.
[4] B. Ghobadian, H. Rahimi, A. M. Nikbakht, G. Najafi, and T. F. Yusaf, Diesel engine performance and exhaust emission analysis using waste cooking biodiesel fuel with an artificial neural network. Renewable Energy, Vol. 34, pp.976-982, 2009.
[5] M. Graboski, and R. McCormick, Combustion of fatand vegetable oil derived fuels in diesel engines. Progressin Energy and Combustion Science, Vol. 24, pp.125-164, 1999.
[6] M. Battistoni, C. N. Grimaldi, Numerical analysis of injector flow and spray characteristics from diesel injectors using fossil and biodiesel fuels, Applied Energy, Vol. 97, No. 1, pp. 656-666, 2012.
[7] R. Payri, J. M. Desantes, F. J. Salvador, J. Manin, Influence on diesel injection characteristics and behavior using biodiesel fuels, SAE paper 2009-01-0851; 2009.
[8] L. Allocca, E. Mancaruso, A. Montanaro, B. M. Vaglieco, A. Vassallo, Renewable biodiesel/reference diesel fuel mixtures distribution in non-evaporating and evaporating conditions for diesel engines. SAE paper 2009-24-0054; 2009.
[9] C.N. Grimaldi, L. Postrioti, Experimental comparison between conventional and bio-derived fuels sprays from a common rail injection system. SAE paper 2000-01-1252, 2000.
[10] H. K. Suh, S.W. Park, and C. S. Lee, Atomization characteristics of di-methyl ether fuel as an alternative fuel injected through a common-rail injection system, Energy and Fuels, Vol. 20, pp. 1471-1481, 2006.
[11] L. Postrioti, C. N. Grimaldi, M. Ceccobello, and R. Di Gioia, Diesel common rail injection system behavior with different fuels. SAE paper 2004-01-0029; 2004.
[12] S. Som, A. L. Ramirez, D.E. Longman, and S.K. Aggarwal, Effect of nozzle orifice geometry on spray, combustion, and emission characteristics under diesel engineconditions, Fuel, Vol. 90, pp.1267–1276, 2011.
[13] C. Arcoumanis, C. B. Crookes, and E. Kinoshita, The potential of di-methyl ether (DME) as an alternative fuel for compression-ignition engines: A review, Fuel, pp. 1014-1030, 2008.
[14] M. Jabbarzade, P. Jabbarzadeh, M. T. Shervanitabar, Numerical comparison of physical conditions effect on spray behavior of di-methyl ether, biodiesel and diesel fuels, Journal of engine research, Vol. 35, pp. 17-29, 2014. (in Persian)
[15] Avl List GmbH. AVL Fire v. 2013, CFD solver, Eulerian multiphase, 2013.
[16] W. Edelbauer, Coupling of 3D Eulerian and Lagrangian Spray Approaches in Industrial Combustion Engine Simulations, Journal of Energy and Power Engineering, Vol. 8, No. 1, pp. 190-200, 2014.
[17] Avl List GmbH. AVL Fire v. 2013, CFD solver, Spray, 2013.
[18] H. Mohammadi, P. Jabbarzadeh, M. Jabbarzadeh, M. T. Shrevani-Tabar, Numerical investigation on the hydrodynamics of the internal flow and spray behavior of diesel fuel in a conical nozzle orifice with the spiral rifling likeguides, Fuel, Vol. 196, No. 5, pp. 419-430, 2017.
[19] A. H. Farajollahi, R. Firuzi, M. Pourseifi, A. Mardani, M. Rostami, Numerical investigation of the effect of swirl and needle lift profile change on the diesel fuel spray behavior, Journal of engine research, Vol. 54, pp. 25-38, 2019. (in Persian)
[20] H. Fujimoto, T. Mishikori, T. Tsumakoto, J.Senda, Modeling of atomization and vaporization process in flash boiling spray, ICLASS-94 Conference, France, 1994.
[21] R. H. Perry, and D. W. Green, Perry's chemical engineer's handbook, McGraw-Hill, 1997.
[22] W. Yuan, A. C. Hansen, and Q. Zhang, Vapor pressure and normal boiling point predictions for pure methyl esters and biodiesel fuels, Fuel, Vol. 84, pp. 943-950, 2005.
[23] W. Yuan, A. C. Hansen, and Q. Zhang, Predicting the temperature dependent viscosity of biodiesel fuels. Fuel, Vol. 88, pp. 1120-1126, 2009.
[24] C. A. W. Allen, K. C. Watts, R. G. Ackmanb, Predicting the surface tension of biodiesel fuels from their fatty acid composition. J Am Oil Chem Soc, Vol. 76, pp. 317-323, 1999.