پیوندهای مفید
آمار
| تعداد نشریات | 8 |
| تعداد شماره‌ها | 414 |
| تعداد مقالات | 5,478 |
| تعداد مشاهده مقاله | 6,010,532 |
| تعداد دریافت فایل اصل مقاله | 5,299,927 |
بررسی عملکرد جریان غیر احتراقی ناشی از چرخاننده یک‌طبقه و دوطبقه در یک میکرومحفظه با استفاده از روش شبیه‌سازی عددی | ||
| نشریه مهندسی مکانیک امیرکبیر | ||
| مقاله 5، دوره 56، شماره 12، 1403، صفحه 1663-1690 اصل مقاله (2.98 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/mej.2025.23813.7816 | ||
| نویسندگان | ||
| اسماعیل یدالهی افرا؛ الیاس لکزیان* | ||
| دانشکده مهندسی هوافضا، پردیس علوم و فناوری‌های نوین، دانشگاه سمنان، سمنان، ایران | ||
| چکیده | ||
| ایجاد جریان چرخشی در محفظه‌های احتراق یکی از روش های افزایش بازده احتراق محسوب می‌گردد. استفاده از چرخاننده یکی از روش های ایجاد جریان چرخشی در محفظه‌های احتراق می‌باشد. اساس کار چرخاننده، ایجاد یک جریان چرخشی با استفاده از پره‌های زاویه‌دار بوده که با ورود به محفظه موجب ایجاد یک ناحیه جریان چرخشی می‌شود. این جریان چرخشی، به نوبه خود سبب اختلاط بهتر می‌شود و متعاقبا موجب بهبود فرایند احتراق می‌شود. مهمترین و چالش‌برانگیزترین روش، تغییر در هندسه چرخاننده می‌باشد. استفاده از چرخاننده دوطبقه، نوآوری جدیدی در طراحی چرخاننده شناخته می‌شود. تعامل بین چرخاننده داخلی و بیرونی، شناسایی نواحی گردش مجدد تشکیل شده و تغییرات شدت آشفتگی در استفاده از چرخاننده دوطبقه و بررسی تغییرات عدد چرخش از جمله مواردی می‌باشد که در این مقاله مورد بررسی قرار می‌گیرند. نتایج مقایسه بین چرخاننده یک‌طبقه و دوطبقه نشان می‌دهد که چرخاننده تک‌طبقه ناحیه گردش مجدد بزرگتر و شدت چرخش بیشتری نسبت به چرخاننده دوطبقه ایجاد می‌کند. علاوه بر نواحی گردش مجدد موجود در محفظه احتراق دارای چرخاننده تک‌طبقه، چهار ناحیه گردش مجدد دیگر بعد از چرخاننده دوطبقه تشکیل می‌شود که می‌تواند موجب پایداری شعله گردد. از طرفی استفاده از چرخاننده دوطبقه، انرژی جنبشی آشفتگی را تا 75 % و همچنین شدت آشفتگی را تا 60 % افزایش می‌دهد. افزایش این دو پارامتر موجب افزایش میزان اختلاط، و دستیابی به توزیع یکنواخت سرعت محوری در فاصله کوتاه‌تری از محفظه می‌گردد. | ||
| کلیدواژه‌ها | ||
| محفظه احتراق؛ جریان چرخشی؛ چرخاننده دوطبقه؛ عدد چرخش؛ شدت آشفتگی | ||
| عنوان مقاله [English] | ||
| Performance Analysis of Non-Reacting Flow of a Single and Double Swirler in a Microchamber Using Numerical Simulation Method | ||
| نویسندگان [English] | ||
| Esmaeil yadollahi afra؛ Elyas Lekzian | ||
| Department of Aerospace, Faculty of New Sciences and Technologies, Semnan University, Semnan, Iran | ||
| چکیده [English] | ||
| Creating swirl flow in combustion chambers is a method to enhance combustion efficiency. One way to achieve this is through the use of a swirler, which generates swirling flow using angled vanes. This swirling flow leads to better mixing and subsequently improves the combustion process. Researchers have explored various methods to increase the mixing of the flow passing through the swirler, with one of the most challenging and significant methods being changes in swirler geometry. Using a double swirler is a novel approach in swirler design. This paper examines the interaction between inner and outer swirlers, identifies recirculation zones, and studies changes in swirl number. The comparison between single and double swirlers in this paper shows that a single swirler creates a larger recirculation zone and higher swirl intensity, contributing to flame stability. Additionally, four new recirculation zones are formed after the double swirler, which also enhances flame stability. The use of a double swirler increases turbulent kinetic energy by up to 75% and turbulence intensity by up to 60%, resulting in better fuel-air mixing and achieving a uniform axial velocity distribution in a shorter distance from the combustion chamber. | ||
| کلیدواژه‌ها [English] | ||
| Combustion Chamber, Swirling Flow, Double Swirler, Swirl Number, Turbulence Intensity | ||
| مراجع | ||
[2] P.C. Nassini, D. Pampaloni, R. Meloni, A. Andreini, Lean blow-out prediction in an industrial gas turbine combustor through a LES-based CFD analysis, Combustion and Flame, 229 (2021) 111391. [3] E. Lekzian, H. Farshi Fasih, R. Modanlou, Aerothermodynamic off-design performance study of a fixed double bypass duct turbofan engine, The Journal of Engine Research, 70(3) (2023) 62-75 [4] E. Lekzian, and R. Modanlou, Performance Study of Separate Exhaust Innovative Turbofan Engine Configurations with the Control Mechanism of a Baseline Engine. AUT Journal of Mechanical Engineering, 2024(Articles in Press). [5] M.R. Abdulwahab, K.A. Al-attab, I.A. Badruddin, M.N. Bashir, J.S. Lee, Biofuels spray and combustion characteristics in a new micro gas turbine combustion chamber design with internal exhaust recycling, Case Studies in Thermal Engineering, 65 (2025) 105595. [6] A.C. Fernandez-Pello, Micropower generation using combustion: Issues and approaches, Proceedings of the combustion institute, 29(1) (2002) 883-899. [7] D. Chen, S. Serbin, K. Burunsuz, Features of a gas turbine combustion chamber in operation with gaseous ammonia, Fuel, 372 (2024) 132149. [8] A.M. Dostiyarov, I.K. Iliev, A.K. Makzumova, Numerical model and experimental research of a new two-tier micro-flame combustor for gas turbines, Thermal Science, (00) (2024) 141-141.. [9] E. Lekzian, M. Sabouri, DSMC investigation on rarefied gas mixing through diverging and converging channels, International Communications in Heat and Mass Transfer, 157 (2024) 107764. [10] E. Lekzian, H.R. Farshi Fasih, Effect of Obstacles Location and Flow Injection on the Mixing of Two-Gaseous Flow in a Microchannel, Amirkabir Journal of Mechanical Engineering, 54(9) (2022) 2139-2156.. [11] M. Darbandi, E. Lakzian, Mixing enhancement of two gases in a microchannel using DSMC, Applied Mechanics and Materials, 307 (2013) 166-169. [12] Y.C. See, M. Ihme, Large-Eddy Simulation of a Gas Turbine Model Combustor, in: 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2013, pp. 172. [13] P. Weigand, W. Meier, X.R. Duan, W. Stricker, M. Aigner, Investigations of swirl flames in a gas turbine model combustor: I. Flow field, structures, temperature, and species distributions, Combustion and flame, 144(1-2) (2006) 205-224. [14] Y.C. See, M. Ihme, LES investigation of flow field sensitivity in a gas turbine model combustor, in: 52nd Aerospace Sciences Meeting, 2014, pp. 0621. [15] A. Mardani, A. Fazlollahi-Ghomshi, Numerical investigation of a double-swirled gas turbine model combustor using a RANS approach with different turbulence–chemistry interaction models, Energy & Fuels, 30(8) (2016) 6764-6776 [16] C. Liu, J. Yang, Q. Dong, C. Lai, J. Zhao, J. Lin, M. Liu, Experimental and numerical study on flow field characteristics of a combustion chamber with double-stage counter-rotating swirlers, International Communications in Heat and Mass Transfer, 151 (2024) 107245. [17] S. Barakat, H. Wang, T. Jin, W. Tao, G. Wang, Isothermal swirling flow characteristics and pressure drop analysis of a novel double swirl burner, AIP Advances, 11(3) (2021). [18] D. Kallifronas, P. Ahmed, J.C. Massey, M. Talibi, A. Ducci, R. Balachandran, N. Swaminathan, K. Bray, Influences of heat release, blockage ratio and swirl on the recirculation zone behind a bluff body, Combustion Science and Technology, 195(15) (2023) 3785-3809. [19] Y. Shen, M. Ghulam, K. Zhang, E. Gutmark, C. Duwig, Vortex breakdown of the swirling flow in a lean direct injection burner, Physics of Fluids, 32(12) (2020). [20] G. Vignat, D. Durox, S. Candel, The suitability of different swirl number definitions for describing swirl flows: Accurate, common and (over-) simplified formulations, Progress in Energy and Combustion Science, 89 (2022) 100969. [21] Y. Li, R. Li, D. Li, J. Bao, P. Zhang, Combustion characteristics of a slotted swirl combustor: An experimental test and numerical validation, International Communications in Heat and Mass Transfer, 66 (2015) 140-147. [22] F. Vashahi, S. Lee, J. Lee, Experimental and computational analysis of the swirling flow generated by an axial counter-rotating swirler in a rectangular model chamber using water test rig, Journal of Engineering for Gas Turbines and Power, 139(8) (2017) 081501. [23] G. Ding, X. He, Z. Zhao, Y. Jin, Z. Zhu, Effect of different triple swirlers on the performance of a triple swirler combustor, Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 229(1) (2015) 26-37. [24] Y. Tong, X. Liu, Z. Wang, M. Richter, J. Klingmann, Experimental and numerical study on bluff-body and swirl stabilized diffusion flames, Fuel, 217 (2018) 352-364. [25] S.S. Rashwan, The effect of swirl number and oxidizer composition on combustion characteristics of non-premixed methane flames, Energy & Fuels, 32(2) (2018) 2517-2526. [26] Z. Xi, Z. Fu, X. Hu, S.W. Sabir, Y. Jiang, An experimental investigation on flame pulsation for a swirl non-premixed combustion, Energies, 11(7) (2018) 1757. [27] A.A. Hosseini, M. Ghodrat, M. Moghiman, S.H. Pourhoseini, Numerical study of inlet air swirl intensity effect of a Methane-Air Diffusion Flame on its combustion characteristics, Case Studies in Thermal Engineering, 18 (2020) 100610. [28] M. İlbaş, S. Karyeyen, İ. Yilmaz, Effect of swirl number on combustion characteristics of hydrogen-containing fuels in a combustor, International Journal of Hydrogen Energy, 41(17) (2016) 7185-7191. [29] D. Huang, J. Xu, R. Chen, H. Meng, Large eddy simulations of turbulent combustion of kerosene-air in a dual swirl gas turbine model combustor at high pressures, Fuel, 282 (2020) 118820. [30] Q. Zeng, D. Zheng, Y. Yuan, Counter-rotating dual-stage swirling combustion characteristics of hydrogen and carbon monoxide at constant fuel flow rate, International Journal of Hydrogen Energy, 45(7) (2020) 4979-4990. [31] N. Bai, W. Fan, R. Zhang, Z. Zou, C. Zhang, P. Yan, Numerical investigation into the structural characteristics of a hydrogen dual-swirl combustor with slight temperature rise combustion, International Journal of Hydrogen Energy, 46(43) (2021) 22646-22658. [32] Z. Fu, H. Gao, Z. Zeng, J. Liu, Q. Zhu, Generation characteristics of thermal NOx in a double-swirler annular combustor under various inlet conditions, Energy, 200 (2020) 117487. [33] A.M. Elbaz, H. Moneib, K. Shebil, W.L. Roberts, Low NOX-LPG staged combustion double swirl flames, Renewable Energy, 138 (2019) 303-315. [34] R. Sharma, M. Kumar, Characterizing Swirl Strength and Recirculation Zone Formation in Tangentially Injected Isothermal Flows, Journal of Applied Fluid Mechanics, 16(3) (2023) 549-560. [35] Y. Fu, S.-M. Jeng, R. Tacina, Confinement effects on the swirling flow generated by a helical axial swirler, in: 44th AIAA Aerospace Sciences Meeting and Exhibit, 2006, pp. 545. [36] G.I. Ilieva, On turbulence and its effects on aerodynamics of flow through turbine stages, Turbulence modelling approaches: current state, development prospects, applications, 143 (2017) [37] H.R.M. Anil, P.S.K. Gowda; S.K. Shankaregowda; S. Rajendran; S.H. Venkataramana. Analytical investigation on mixing characteristics of airfoil shaped swirler for gas turbine combustors. in AIP Conference Proceedings. 2024. AIP Publishing. | ||
|
آمار تعداد مشاهده مقاله: 177 تعداد دریافت فایل اصل مقاله: 168 |
||