پیوندهای مفید
آمار
| تعداد نشریات | 8 |
| تعداد شماره‌ها | 414 |
| تعداد مقالات | 5,478 |
| تعداد مشاهده مقاله | 6,010,620 |
| تعداد دریافت فایل اصل مقاله | 5,299,932 |
بررسی اثر ایجاد یک شیار عمودی بر سطح پره‌های یک پروانه‌ی نیمه‌مغروق | ||
| نشریه مهندسی مکانیک امیرکبیر | ||
| مقاله 7، دوره 56، شماره 6، شهریور 1403، صفحه 765-790 اصل مقاله (2.48 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/mej.2024.23088.7716 | ||
| نویسندگان | ||
| مجتبی برزگر رحیمی1؛ یاسین برزگر رحیمی2؛ محمود سالاری* 1 | ||
| 1گروه مهندسی مکانیک، دانشگاه جامع امام حسین (ع)، تهران، ایران | ||
| 2گروه مهندسی شیمی، دانشگاه گیلان، رشت، ایران | ||
| چکیده | ||
| پروانه‌ی نیمه‌مغروق نوعی از پروانههای دریایی است که در شناورهای تندرو از آن استفاده می‌شود. این پروانه مورد توجه طراحان قرار گرفته است؛ زیرا در اعداد کاویتاسیون نسبتا زیاد، دچار پدیده‌ی کاویتاسیون نمی‌شود. همچنین پروانههای نیمه‌مغروق در سرعت‌‌های بالا از پایداری رانشی و گشتاوری مناسبی برخوردار هستند و مانورپذیری بالایی هم دارند. از این رو بررسی بیشتر پیرامون آن، حائز اهمیت است. پژوهش پیش رو با هدف بررسی اثر ایجاد یک شیار عمودی بر سطح پره‌های یک پروانه‌ی نیمه‌مغروق انجام شده و ایده‌ی آن بر گرفته از سطح شیاردار یا کنگره‌دار در کفِ برخی شناورهای تندرو است. پروانه‌ی مورد بررسی در این پژوهش، پروانه‌ی نیمه‌مغروق 841-B موسوم به الفسون می‌باشد. شبکه‌بندی دامنه‌ی حل سه بعدی و شبیه‌سازی عددی در نرم‌افزار اِستار سی‌‌سی‌اِم انجام شده است. حالت مورد نظر در این شبیه‌سازی عددی، نسبت عمق غوطه‌وری 33%، ضریب پیشروی 0/8، عدد کاویتاسیون 2/3، عدد فرود 6 و زاویه‌ی صفر محور (حالت افقی) است. نتایج حاکی از آن است که بازدهی پروانه‌ی شیاردار 44/5% می‌باشد که این مقدار از بازدهی پروانه‌ی بدون شیار کمتر است. در انتها می‌توان گفت که شیار ایجاد شده، اثر نامطلوب بر بازدهی و عملکرد پروانه داشته و در عمل استفاده از آن در شرایط کاری پروانه‌ی مورد بررسی، توصیه نمی‌شود. | ||
| کلیدواژه‌ها | ||
| پروانه‌ی نیمه‌مغروق شیاردار؛ 841-B؛ شبیه‌سازی عددی؛ اِستار سی‌‌سی‌اِم | ||
| عنوان مقاله [English] | ||
| Investigating the effect of creating a vertical groove on the surface of a semi-submerged propeller blades | ||
| نویسندگان [English] | ||
| Mojtaba Barzegar Rahimi1؛ Yasin Barzegar Rahimi2؛ mahmoud salari1 | ||
| 1Department of Mechanical Engineering, Faculty of Engineering, Imam Hossein University, Tehran, Iran | ||
| 2B.Sc. Student in Chemical Engineering, Faculty of Technical Engineering, Guilan University, Rasht, Iran | ||
| چکیده [English] | ||
| The semi-submerged propeller is a type of marine propeller that is used in high-speed vessels. This propeller has attracted designer's attention; because it resists the destructive phenomenon of cavitation. Also Semi-submerged propellers have suitable thrust and torque stability at high speeds and offer high maneuverability. Therefore, further investigation around it is important. The current research aims to examine the effect of creating a vertical groove on the surface of the blades of a semi-submerged propeller, an idea inspired by the grooved or corrugated surface on the bottom of some high-speed vessels. The propeller examined in this study is the semi-submerged propeller 841-B known as Olofsson. The 3D domain meshing and numerical simulation have been done in the Star CCM software. The specific condition considered in this numerical simulation is a submergence depth ratio of 33%, an advance coefficient of 0.8, a cavitation number of 2.3, a Froude number of 6, and a shaft angle of zero degrees (horizontal position). The results showed that the efficiency of the grooved propeller is 44.5%, which is less than the efficiency of the ungrooved propeller. In the end, it can be said that the created groove has an adverse effect on the efficiency and performance of the propeller and it is not recommended to use it in the working conditions of the investigated propeller. | ||
| کلیدواژه‌ها [English] | ||
| Grooved Semi-Submerged Propeller, 841-B, Numerical Simulation, Star CCM | ||
| مراجع | ||
|
[1] J.L. Allison, Propellers for high-performance craft, Marine Technology and SNAME News, 15(04) (1978) 335-380. [2] J. Hadler, Performance of partially submerged propellers, 7th ONR Symposhium on Naval Hydrodynamics-Rome, (August 1968). [3] N. Olofsson, Force and flow characteristics of a partially submerged propeller, Chalmers University of Technology, 1996. [4] H. Shiba, Air-drawing of marine propellers, Report of transportation technical research institute, 9 (1953) 1-320. [5] R. Hecker, Experimental performance of a partially submerged propeller in inclined flow, Society of Naval Architects and Marine Engineers, Florida, 1973. [6] C. Kruppa, Testing of partially submerged propellers, 13th ITTC-Berlin, (September 1972). [7] C. Kruppa, Testing surface piercing propellers, Marin Workshops on Advance Vessel Station Keeping, Propulsor-hull interaction & Nautical Simulators, Wageningen, (1992). [8] J.C. Rose, C. Kruppa, Methodical series model test results, FAST‘91, Trondheim, Norway, (1991). [9] J. Rose, C. Kruppa, K. Koushan, Surface piercing propellers-propeller/hull interaction, FAST 93, December, Yokohama, Japan, (1993) 867-881. [10] M. Fernando, A. Scamardella, N. Bose, P. Liu, B. Veitch, Performance of a family of surface piercing propellers, Royal Institution of Naval Architects. Transactions. Part A. International Journal of Maritime Engineering, 144(Part A1) (2002) 63-77. [11] M. Ferrando, A. Scamardella, Surface piercing propellers: Testing methodologies, results analysis and comments on open water characteristics, Proceedings of Small Craft Marine Engineering, Resistance, and Propulsion Symposium-SNAME, (1996). [12] N. Olofsson, A contribution on the performance of partially submerged propellers, Fast '93, 2nd Intl Conf on Fast Sea Transportation; 13-16 Dec 1993; Yokohama, Japan, 1 (1993) 765. [13] M. Keller, Full-scale measurements on a ventilated propeller, Proc FAST 95, Lubeck-Travermunde, Germany, 2 (1995) 991-1002. [14] P.K. Dyson, Modelling, testing and design, of a surface piercing propeller drive, PhD Thesis; University of PLYMOUTH (2000). [15] Y.L. Young, S.A. Kinnas, Numerical analysis of surface-piercing propellers, in: 2003 Propeller and Shaft Symposium, 2003, pp. 4-1. [16] A. Califano, S. Steen, Analysis of different propeller ventilation mechanisms by means of RANS simulations, Proceedings of The First International Symposium on Marine Propulsors, Norway, 2009. [17] K. Koushan, Dynamics of ventilated propeller blade loading on thrusters due to forced sinusoidal heave motion, in: Proceedings of the 26th Symposium on Naval Hydrodynamics, Rome, Italy, 2006, pp. 17-22. [18] S. Alimirzazadeh, S.Z. Roshan, M.S. Seif, Unsteady RANS simulation of a surface piercing propeller in oblique flow, Applied ocean research, 56 (2016) 79-91. [19] E. Yari, H. Ghassemi, Numerical analysis of surface piercing propeller in unsteady conditions and cupped effect on ventilation pattern of blade cross-section, Journal of marine science and technology, 21(3) (2016) 501-516. [20] E. Yari, H. Ghassemi, Hydrodynamic analysis of the surface-piercing propeller in unsteady open water condition using boundary element method, International journal of naval architecture and ocean engineering, 8(1) (2016) 22-37. [21] E. Yari, H. Ghassemi, Numerical study of surface tension effect on the hydrodynamic modeling of the partially submerged propeller's blade section, Journal of Mechanics, 32(5) (2016) 653-664. [22] A. Yousefi, R. Shafaghat, Numerical study of the parameters affecting the formation and growth of ventilation in a surface-piercing propeller, Applied Ocean Research, 104 (2020) 102360. [23] M. Barzegar Rahimi, M. Salari, Y. Barzegar Rahimi, S.S. Taqavi Khesal, Numerical simulation of semi-submerged propeller 841-B and investigation of its hydrodynamic characteristics, in: The 20th National Conference on Electrical, Computer and Mechanical Engineering, 1402 (In Persian). [24] M. Barzegar Rahimi, M. Salari, Y. Barzegar Rahimi, S.S. Taqavi Khesal, Investigating the effect of changing the immersion depth on the hydrodynamic characteristics of the semi-submerged propeller 841-B, in: The 20th National Conference on Electrical, Computer and Mechanical Engineering, 1402 (In Persian). [25] M. Barzegar Rahimi, M. Salari, Y. Barzegar Rahimi, S.S. Taqavi Khesal, Studying and checking the meshing of semi-submerged propeller 841-B in Star CCM software, in: The 20th National Conference on Electrical, Computer and Mechanical Engineering, 1402 (In Persian). [26] E.A. Heath, Improvement in Screw-propellers, 218438, 1879. [27] B.T.Barnett, Propeller, 2160323, 1939. [28] S. Kei, Propeller, JP2014169017 (A), 2014. [29] A. Seeni, F. Ismail, P. Rajendran, The Aerodynamic Performance Characteristics of a Grooved Propeller Using a RANS solver: Effect of Groove Geometry and Positioning of Multiple Grooves, International Conference on Innovations in Thermo-Fluid Engineering and Sciences , India, 2020. [30] M. Barzegar Rahimi, N. Amani Fard, L. Samai, Numerical study of flow control around circular cylinder by using two other control cylinders, in: 19th Fluid Dynamics Conference, 1400 (In Persian). [31] M. Barzegar Rahimi, A. Jalalian, Investigating the effect of the location of flow controllers on the reduction of vortices around the cylinder, Fluid Mechanics & Aerodynamics, 11(2) (1401) 12 (In Persian). [32] M. Barzegar Rahimi, A. Jalalian, Finding the optimal location of the flow controllers to reduce the vortices around the cylinder, in: The 20th Fluid Dynamics Conference, 1402 (In Persian). [33] M. Barzegar Rahimi, Y. Barzegar Rahimi, S.S. Taqavi Khesal, M. Salari, Numerical analysis of turbulent flow control around the cylinder using two other control cylinders, in: 7th International Conference on Technology Development in Mechanical and Aerospace Engineering, 1402 (In Persian). [34] K. Himei, H. Yamaguchi, Numerical study on performance of surface piercing propeller using RANS approach, in: SNAME International Conference on Fast Sea Transportation, SNAME, 2015, pp. D021S008R002. [35] H.A. Kutty, P. Rajendran, Review on numerical and experimental research on conventional and unconventional propeller blade design, Int. Rev. Aerosp. Eng, 10 (2017) 61. [36] M. Kamran, N.M. Nouri, H. Goudarzi, S. Golrokhifar, Experimental evaluation of the effect of positioning and operating parameters on the performance of a surface-piercing propeller, Scientific Reports, 12(1) (2022) 18566. | ||
|
آمار تعداد مشاهده مقاله: 1,020 تعداد دریافت فایل اصل مقاله: 315 |
||