Numerical Analysis of Hub Effect on ydrodynamic Performance of Propellers with Inclusion of PBCF to Equalize the Induced Velocity

• Autorzy: Ghassemi H. , Mardan A. , Ardeshir A.
• Języki publikacji: EN

Abstrakty

EN

In this article the boundary element method (BEM) is applied to analyze the propeller hub as a non-lifting body and the blades in its vicinity as lifting bodies. In solver, the geometrical modeling of hub, blades are PBCF (Propeller Boss Cap Fin) constructed by quadrilateral elements. The velocity potential is determined on each element by discretized boundary integral equation. Iterative procedure is used to consider the adjacent body effect. In each step the body was independently analyzed with the influence of near body considered in inflow velocity. The induced velocity of propeller was calculated with and without PBCF in downstream. PBCF, an energy-saving device, reduces and uniforms the induced velocity of propeller in downstream. Numerical results of propeller hydrodynamic characteristics including hub effect, induced velocities, PBCF influence are presented.

Słowa kluczowe

EN

propeller hub; induced velocities; hub vortex; PBCF

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2012
• Tom: nr 2
• Strony: 17--24
• Opis fizyczny: Bibliogr. 20 poz., rys., tab.

Twórcy

autor

Ghassemi H.

autor

Mardan A.

autor

Ardeshir A.

• Faculty of Marine Technology Amirkabir University of Technology Hafez Ave., Tehran, IRAN,

Bibliografia

• 1. Wang, H.: Hub effects in propeller design and analysis. PhD Dissertation, Ocean Engineering Department, MIT, 1985.
• 2. Wind, J.: Hub size selection criteria for controllable pitch propellers as a means to ensure system integrity. Naval Engineers Journal, No. 90(4), 1978, pp.49-61
• 3. Hess, J.L.: Calculation of potential flow about arbitrary threedimensional lifting bodies. McDonnell Douglas Rep. MDC J5679-01, 1972.
• 4. Glegg. S.A.: Effect of center body scattering on propeller noise. AIAA, vol. 29, April 1991, p. 572-576
• 5. Yang, C.,Wang G., Masahiro T.: A method of improving the precision of the prediction of the performance characteristics of a CPP the effect of boss being taken into consideration. Shipbuilding of China, No. 116, 1992
• 6. Liu,Y-H, Ikehata, M.: Investigation into hub effect of marine propeller by surface vortex lattice method. Journal of Society of Naval Arch. Japan, Vol. 177, 1995, pp. 59-66
• 7. Cai, H. P., Su Y. M., Li X., Shen H.L.: Using the surface panel method to predict the steady performance of ducted propellers. J. Marine. Sci. Appl., 2009.
• 8. Http://www.mol.co.jp/pr-e/2011/e-pr_1145.html
• 9. Ouchi, K.B., Kono Y., Shiotsu T., Koizuka H.: PBCF (Propeller Boss Cap Fins). J Soc. Nav. Arch. Japan (SNAJ),Vol 163, 1988.
• 10. Ouchi, K., Tamashima, M.: Research and development of PBCF (propeller boss cap fin), new and practical device to enhance propeller efficiency. 4th international Symposium on Practical Design of Ships and Mobile Units (PRADS), Bulgaria,1989
• 11. Ouchi, K., Tamashima M., Arai K.: Reduction of Propeller cavitation Noise by PBCF (Propeller Boss Cap Fins). Kansai Soc. Naval Arch. Japan (KSNAJ), Vol. 216, 1991.
• 12. Ouchi, K., Tamashima M.: A study on correlation between propeller pitch distribution and improvement of propeller efficiency by PBCF. Kansai Soc Naval Arch Japan (KSNAJ), Vol. 217, 1992.
• 13. Junglewitz, A.: Der Nabene influße im Schrauben propeller. PhD Thesis, Univ. of Rostock., 1996.
• 14. Hsin, C.Y., Lin, B.H. and Lin, C.C.: The optimum design of a propeller energy-saving device by computational fluid dynamics. The Proceeding of the Fifth Int. Conf. Of Computational Fluid Dynamics (ICCFD), Korea, 2008, pp.655-660
• 15. Ghassemi, H., Ghadimi, P.: Computational hydrodynamic analysis of the propeller-rudder and the AZIPOD systems. Ocean Engineering, Vol. 34, 2007, pp.117-130
• 16. Ghassemi, H.: The effect of wake flow and skew angle on the ship propeller performance. Scientia Iranica, No. 2,Vol. 16,, 2009, pp.149-158
• 17. Ghassemi, H.: Hydrodynamic performance of coaxial contrarotating propeller (CCRP) for large ships. Polish Maritime Research, No. 59,Vol. 16, 2008, pp.22-28
• 18. Ghassemi, H.: Hydrodynamic characteristics of the surfacepiercing propellers for the planing craft. J. Marine Science & Application (JMSA), Vol. 7, 2008, pp.147-156
• 19. Ghassemi, H., Ghadimi, P.: Hydrodynamic efficiency improvement of the high skew propeller for the underwater vehicle under surface and submerged conditions. J. Ocean Univ. China (JOUC), Vol. 10, 2011, pp.314-324
• 20. Richard, H. H., Dinham-Peren, T., Nojiri, T.: Model and full scale evaluation of a ‘Propeller Boss Cap Fins’ device fitted to an Aframax tanker. Second International Symposium on Marine Propulsors, SMP’11, Hamburg, Germany, June 2011.