تأثیر شکل پاشش مثلثی بر روی عملکرد موتور احتراق اشتعال تراکمی با واکنش‌پذیری کنترل‌شده

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناس ارشد مهندسی شیمی، دانشگاه صنعتی امیرکبیر

2 استادیار مهندسی شیمی، دانشگاه صنعتی امیرکبیر

چکیده

شکل پاشش یکی از مهم­ترین پارامترهای تأثیرگذار بر عملکرد موتورهای احتراق داخلی است. در این مقاله، تأثیر سه نوع شکل پاشش مثلثی یعنی مثلث چپ، وسط، و راست که با پارامتر a برابر با به‌ترتیب 0، 5/0 و 1 متمایز می­شوند، بر عملکرد موتور احتراق اشتعال تراکمی با واکنش­پذیری کنترل ­شده بررسی و با شکل پاشش مستطیلی مقایسه شده است. با افزایش a، مقدار بازدهی ناخالص تعیین شده (GIE) و اکسیدهای نیتروژن (NOx) افزایش می­یابند، در حالی که مقدار هیدروکربن­های نسوخته (UHC) و مونواکسید کربن (CO) کاهش می­یابد. بالاترین میزان GIE و کم­ترین میزان UHC و CO مربوط به شکل پاشش مثلثی راست است که به‌ترتیب 9/9 درصد بیشتر و ۴۵/۲۷ و ۵۱/۲۵ درصد کمتر از شکل پاشش مستطیلی هستند، درحالی که کم­ترین میزان NOx تولیدشده به‌وسیلۀ شکل پاشش مثلثی چپ حاصل می­شود که ۱۵/۱۴ درصد کم­تر از شکل پاشش مستطیلی است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effect of Triangular Injection Rate Shape on the Performance of a Reactivity Controlled Compression Ignition Engine

نویسندگان [English]

  • T. Yazdani Motlagh 1
  • L. N. Azadani 2
1 M. Sc. Student of Chemical Engineering, Amirkabir University of Technology
2 Assistant Professor of Chemical Engineering, Amirkabir University of Technology
چکیده [English]

Injection rate shape has an important effect on the performance of internal combustion engines. In this study, the effect of three triangular injection rate shapes, including left triangle, middle triangle, and right triangle, which were distinguished by the parameter a equal to 0, 0.5, and 1, respectively, on the performance of a Reactivity Controlled Compression Ignition (RCCI) engine were investigated and compared with the square injection rate shape. It was realized that by increasing, the gross indicated efficiency (GIE) and nitrogen oxides (NOx) emissions increased, while unburned hydrocarbons (UHC) and carbon monoxide (CO) emissions decreased. The highest GIE and the lowest UHC and CO emissions were obtained by the right triangle, which were 9.9% higher and 27.45% and 25.51% lower than those obtained by the square injection rate shape, while the lowest NOx emissions were obtained by the left triangle, which was 14.15% lower than that obtained by the square injection rate shape.
 

کلیدواژه‌ها [English]

  • Triangular Injection Rate Shape
  • Reactivity Controlled Compression Ignition Engine
  • Natural Gas
  • Computational Fluid Dynamics

مراجع

[1]        Dec, J. E., "Advanced compression-ignition engines - Understanding the in-cylinder processes", Proc. Combust. Inst., 32 II(2), pp. 2727–2742, (2009).
[2]        Reitz, R. D., Duraisamy, G., "Review of high efficiency and clean reactivity controlled compression ignition (RCCI) combustion in internal combustion engines", Prog. Energy Combust. Sci., 46, pp. 12–71, (2015).
[3]        Yao, M., Zheng, Z., Liu, H., "Progress and recent trends in homogeneous charge compression ignition (HCCI) engines", Prog. Energy Combust. Sci., 35(5), pp. 398–437, (2009).
[4]        Wang, H., Zheng, Z., Liu, H., Yao, M., "Combustion mode design with high efficiency and low emissions controlled by mixtures stratification and fuel reactivity", Front. Mech. Eng., 1, p. 1-15, (2015).
[5]        Kokjohn, S. L., Hanson, R. M., Splitter, D. A., Reitz, R. D., "Fuel reactivity controlled compression ignition (RCCI): a pathway to controlled high-efficiency clean combustion", Int. J. Engine Res., 12(3), pp. 209–226, (2011).
[6]        Ansari, E., Poorghasemi, K., Khoshbakht Irdmousa, B., Shahbakhti, M., Naber, J., "Efficiency and Emissions Mapping of a Light Duty Diesel - Natural Gas Engine Operating in Conventional Diesel and RCCI Modes", SAE International, pp. 1-15, (2016).
[7]        Li, J., Yang, W., Zhou, D., "Review on the management of RCCI engines", Renew. Sustain. Energy Rev., 69, pp. 65-79, (2017).
[8]        Ghorbanpour, M., Rasekhi, R., "A parametric investigation of HCCI combustion to reduce emissions and improve efficiency using a CFD model approach", Fuel, 106, pp. 157–165, (2013).
[9]        Shuai, S., Abani, N., Yoshikawa, T., Reitz, R. D., Park, S. W., "Evaluation of the effects of injection timing and rate-shape on diesel low temperature combustion using advanced CFD modeling", Fuel, 88(7), pp. 1235–1244, (2009).
[10]      Yazdani, K., Amani, E., Naderan, H.,"Multi-objective optimizations of the boot injection strategy for reactivity controlled compression ignition engines", Int. J. Engine Res., 20(8-9), pp. 889-910, (2019).
[11]      Motlagh, T. Y., Azadani, L. N., Yazdani, K.,"Multi-objective optimization of diesel injection parameters in a natural gas/diesel reactivity controlled compression ignition engine", Appl. Energy, 278, p. 115746, (2020).
[12]      Rahimi, A., Fatehifar, E., Saray, R. K., "Development of an optimized chemical kinetic mechanism for homogeneous charge compression ignition combustion of a fuel blend of n-heptane and natural gas using a genetic algorithm", Proc. Inst. Mech. Eng. Part D J. Automob. Eng., 224(9), pp. 1141-1159, (2010).
[13]      Han, Z., Reitz, R. D., "Turbulence Modeling of Internal Combustion Engines Using RNG κ-ε Models", Combust. Sci. Technol., 106(4–6), pp. 267-295, (1995).
[14]      Beale, J. C., Reitz, R. D., "Modeling spray atomization with the Kelvin-Helmholtz/Rayleigh-Taylor hybrid model", At. Sprays, 9(6), pp. 623-60, (1999).
[15]      Nordin, P., Complex chemistry modeling of diesel spray combustion: PhD thesis, Sweden: Chalmers University, (2000).
[16]      Ranz, W. E., "Evaporation from drops, Parts I & II", Chem Eng Prog., 48, pp. 141–146, (1952).
[17]      Schiller, L., Naumann, Z., "A drag coefficient correlation", Z. Ver. Deutsch. Ing, 77, pp. 318-320, (1935).
[18]      Chen, J. Y., "Stochastic modeling of partially stirred reactors", Combust. Sci. Technol., 122(1-6), pp. 63-94, (1997).
[19]      Nieman, D. E., Dempsey, A. B., Reitz, R. D. "Heavy-Duty RCCI Operation Using Natural Gas and Diesel", SAE Int J Engines, 5(2), pp. 270–285, (2018).
مهندسی شیمی ایران
دوره 21، شماره 122 - شماره پیاپی 122
مرداد و شهریور 1401
صفحه 24-34

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