پیوندهای مفید
آمار
| تعداد نشریات | 8 |
| تعداد شماره‌ها | 425 |
| تعداد مقالات | 5,549 |
| تعداد مشاهده مقاله | 6,496,193 |
| تعداد دریافت فایل اصل مقاله | 5,552,975 |
Numerical Investigation of Step Depth Effects on Hydrodynamic Performance of Planing Hull Using Dynamic Mesh and Two Degree of Freedom Model | ||
| AUT Journal of Mechanical Engineering | ||
| مقاله 1، دوره 3، شماره 2، اسفند 2019، صفحه 139-148 اصل مقاله (1.79 M) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22060/ajme.2019.14364.5723 | ||
| نویسندگان | ||
| Reza Tork Chooran1؛ Rouzbeh Shafaghat* 1؛ Reza Yoosefi2 | ||
| 1Sea-Based Energy Research Group-Babol Noshirvani University of Technology-Babol-Iran | ||
| 2Department of Mechanical Engineering, Babol Noshiravani University of Technology | ||
| چکیده | ||
| At low speeds, planing hull performs like a displacement one and buoyancy force has the most influence on it, but, when it reaches to enough speed, hydrodynamic lift force equilibrates 50–90 percent of its weight. Planing hull researchers have introduced different methods in order to achieve the highest speed. A desirable planing hull has low weight-to-power ratio and good maneuverability. Several ways have been applied to reduce drag and one of the best strategies is to use step that leads to less wetted surface and more lift power. This work addresses the numerical study of step height effect on hydrodynamic performance of planing hull. A specified form of a monohull was changed to the step one while important geometric parameters such as Deadrise angle, width and length were equal in both of them. In order to simulate hull movements, a comprehensive series of viscous computational fluid dynamics simulations considering free-surface and two degree of freedom motion of the hull (heave and pitch) have been performed by application of dynamic mesh. Results have been presented as contours and plots. According to the results, deeper steps provide greater levels of ventilation but, there is a limit in step depth increment because porpoising happens after a specific height. | ||
| کلیدواژه‌ها | ||
| High speed planing hull؛ Step؛ Two degrees of freedom؛ Trim angle؛ Volume of Fluid Method | ||
| مراجع | ||
|
[1] P. Lotfi, M. Ashrafizaadeh, R.K. Esfahan, Numerical investigation of a stepped planing hull in calm water, Ocean engineering, 94 (2015) 103-110.
[2] O.M. Faltinsen, Hydrodynamics of high-speed marine vehicles, Cambridge university press, 2005.
[3] http://www.aeromarineresearch.com/steps.html. [4] L.R. Baker, Boat, in, Google Patents, 1916. [5] W. Sottorf, Experiments with planing surfaces, (1934). [6] J.M. Shoemaker, Tank tests of flat and v-bottom planning surfaces, (1934). [7] L. Sedov, Scale effect and optimum relations for sea surface planning, (1947). [8] J.R. Dawson, Tank tests of two models of flying-boat hulls to determine the effect of ventilating the step, (1937). [9] D. Savitsky, Hydrodynamic design of planing hulls, Marine Technology, 1(1) (1964). [10] D. Savitsky, P.W. Brown, Procedures for hydrodynamic evaluation of planing hulls in smooth and rough water, Marine Technology, 13(4) (1976) 381-400.
[11] E.P. Clement, J.D. Pope, Stepless and Stepped Planing Hulls-Graphs for Performance Prediction and Design, DAVID TAYLOR MODEL BASIN WASHINGTON DC, 1961.
[12] M.V. Makasyeyev, Numerical modeling of cavity flow on bottom of a stepped planing hull, (2009).
[13] D. Taunton, D. Hudson, R. Shenoi, Characteristics of a series of high speed hard chine planing hulls-part 1: performance in calm water, International Journal of Small Craft Technology, 152 (2010) 55-75.
[14] K.I. Matveev, Two-dimensional modeling of stepped planing hulls with open and pressurized air cavities, International Journal of Naval Architecture and Ocean Engineering, 4(2) (2012) 162-171.
[15] J.-I. Shin, J.-M. Yang, H.-W. Park, J.-S. Kim, H.-C. Kim, A Study on the Resistance Characteristics of a Stepped Planing Hull Using a High-Speed Towing System, Journal of the Society of Naval Architects of Korea, 42(4) (2005) 341-349.
[16] D. Svahn, Performance prediction of hulls with transverse steps, A Report of Masters Thesis, The Royal Institute of Technology, KTH, Centre for Naval Architecture, (2009).
[17] D. Savitsky, M. Morabito, Surface wave contours associated with the forebody wake of stepped planing hulls, Marine Technology, 47(1) (2010) 1-16.
[18] W.R. Garland, K.J. Maki, A numerical study of a two- dimensional stepped planing surface, Journal of Ship Production and Design, 28(2) (2012) 60-72.
[19] K.I. Matveev, T.J. Burnett, A.E. Ockfen, Study of air- ventilated cavity under model hull on water surface, Ocean Engineering, 36(12) (2009) 930-940.
[20] A. Loni, P. Ghadimi, H. Nowruzi, A. Dashtimanesh, Developing a computer program for mathematical investigation of stepped planing hull characteristics, International Journal of Physical Research, 1(2) (2013) 34-47.
[21] A. De Marco, S. Mancini, S. Miranda, R. Scognamiglio, L. Vitiello, Experimental and numerical hydrodynamic analysis of a stepped planing hull, Applied Ocean Research, 64 (2017) 135-154.
[22] D. Jones, D. Clarke, FLUENT Code simulation of flow around a naval hull: the DTMB 5415, DEFENSE SCIENCE AND TECHNOLOGY ORGANIZATION VICTORIA (AUSTRALIA) MARITIME, 2010.
[23] M.S. Seif, E. Jahanbakhsh, R. Panahi, M.H. Karimi, A unified computational method for simulating dynamic behavior of planing vessels, China Ocean Engineering, 23(2) (2009) 1-10.
[24] H. Ghassemi, M. Kamarlouei, S.T.G. Veysi, A hydrodynamic methodology and CFD analysis for performance prediction of stepped planing hulls, Polish Maritime Research, 22(2) (2015) 23-31.
[25] M. Bakhtiari, S. Veysi, H. Ghassemi, Numerical modeling of the stepped planing hull in calm water, International Journal of Engineering-Transactions B: Applications, 29(2) (2016) 236.
[26] A. Mehrizi, M.T. Dakhrabadi, A.V. Sefat, M. Seif, Hydrodynamic Optimization of Hull Form of High Speed Planing Craft by Multi Objective Genetic Algorithm in Calm Water.
[27] R. Yousefi, R. Shafaghat, M. Shakeri, Hydrodynamic analysis techniques for high-speed planing hulls, Applied ocean research, 42 (2013) 105-113.
[28] R. Yousefi, R. Shafaghat, M. Shakeri, High-speed planing hull drag reduction using tunnels, Ocean engineering, 84 (2014) 54-60.
[29] H.K. Moghadam, R. Shafaghat, R. Yousefi, Numerical investigation of the tunnel aperture on drag reduction in a high-speed tunneled planing hull, Journal of the Brazilian Society of Mechanical Sciences and Engineering, 37(6)(2015) 1719-1730.
[30] S.T.G. Veysi, M. Bakhtiari, H. Ghassemi, M. Ghiasi, Toward numerical modeling of the stepped and non- stepped planing hull, Journal of the Brazilian Society of Mechanical Sciences and Engineering, 37(6) (2015) 1635-1645.
[31] W.R. Garland, Stepped planing hull investigation, SNAME Trans., (2010) 1-11. | ||
|
آمار تعداد مشاهده مقاله: 1,142 تعداد دریافت فایل اصل مقاله: 906 |
||