A new multidisciplinary approach for three-dimensional foil machining

• Autorzy: Jaouen R. , Martineau J. P. , Hascoet J.-Y. , Damay T.
• Języki publikacji: EN

Abstrakty

EN

The context of this paper implies disciplines of mechanical design, machining and hydrodynamics behaviours applied to propellers. Performances of propellers are linked with their shape and their surface texture. To optimise hydrodynamics behaviours, it is demonstrated in this paper that required polishing operation is not essential. To study the influence of an predefined surface texture on the performances of a three-dimensional foil, a comparative analysis is conducted. The presented methodology allows the definition of tool paths, according to the desired surface texture and upstream flow. Three foils are machined, and their performances are compared to each other: the first, considered as the reference, has a surface roughness like mirror, the second features machined peaks parallel to the upstream flow and the third has machined peaks following streamlines obtained by Computational Fluid Dynamics for operating conditions. The validation of this method is experimental: on the one hand by the manufacturing of foils following pre-established trajectories, and on the other hand by the functional test in hydrodynamic tunnel. This paper presents the methodology steps, and the hydrodynamic behaviours that the three different foils show. In a first approach, the different surface textures do not influence the lift coefficient but strongly influence the drag coefficient of a foil. Furthermore several hypotheses educed from the observed tendencies are discussed.

Słowa kluczowe

EN

adapted tool trajectories; 5 axis machining machining peaks; hydrofoil lspropellers; hydrodynamic

• Wydawca: Wydawnictwo Wrocławskiej Rady FSNT NOT
• Czasopismo: Journal of Machine Engineering
• Rocznik: 2009
• Tom: Vol. 9, No. 1
• Strony: 5--17
• Opis fizyczny: Bibliogr. 8 poz., tab., rys.

Twórcy

autor

Jaouen R.

• Institut de Recherche de l'Ecole Navale, BCRM , ENGEP Ecole, Marine nationale, CC 600, 29240 BREST Cedex 9, France
• Institut de Recherche en Communication et Cybernétique de Nantes, 1 rue de la Noë, BP 92101, 44321 Nantes Cedex 03, France

autor

Martineau J. P.

• Institut de Recherche de l'Ecole Navale, BCRM , ENGEP Ecole, Marine nationale, CC 600, 29240 BREST Cedex 9, France

autor

Hascoet J.-Y.

• Institut de Recherche de l'Ecole Navale, BCRM , ENGEP Ecole, Marine nationale, CC 600, 29240 BREST Cedex 9, France

autor

Damay T.

• Institut de Recherche en Communication et Cybernétique de Nantes, 1 rue de la Noë, BP 92101, 44321 Nantes Cedex 03, France

Bibliografia

• 1. CARLTON J.S., Marine Propellers and Propulsion, Butterworth Heinemann Ltd, ISBN 075061143X, 1994, 432.
• 2. BRIENT A., LEROUX J.B., MARTINEAU J.P., ASTOLFI J.A., HASCOËT J.Y., An Experimental Analysis of the Effect of Roughness Produced by Machining on Hydrodynamic Performance of Two-Dimensional Hydrofoil , Proceedings of the 3rd International Conference on Navy and Shipbuilding Nowadays, Saint-Petersburg, Russia, 2003, 249-254.
• 3. SVENSEN E., MEDHURST J. S., A Simplified Method for the Assessment of Propeller Roughness Penalties, Marine Technology, Vol. 21, No. 1, 1984,41-48.
• 4. ISO 484/1., Hélices de navires - Tolérances de fabrication - Partie ¡ : Hélices de diamètre supérieur à 2,50 m, NFJ 65-510, Décembre 1985.
• 5. DAMAY T., JAOUEN R., HASCOËT J.Y., MARTINEAU J.P., BRIENT A., ASTOLFI J.A., HAUVILLE P., 2007. - Design for Manufacturing applied to Hydrofoils dedicated to Marine Propellers - Proceedings of sixth International Conference (2007) on High Speed Machining, San Sebastian, Spain, 21-22 Mars, 2007, 432-437.
• 6. FRUMAN D. H., CERRUTI P., PICHON T., DUPONT P., Effect of Hydrofoil Planform on Tip Vortex Roll-Up and Cavitation, J. Fluids Eng., Volume 117, Issue 1, 1995, 162 (8 pages).
• 7. RAMOS A. M., RELVAS C., SIMÔES J. A., The influence of finishing milling strategies on texture, roughness and dimensional deviations on the machining of complex surfaces. Journal of Materials Processing Technology, Volume 136, Issues 1-3, 10 May 2003, 209-216.
• 8. BOUJELBENE M., BRENIER B., FABRE A., MOISAN A., A contribution to the improvement of surface texture for die and mold machining. Proceedings of the 4th International Conference on Integrated Design and Manufacturing in Mechanical Engineering, Clermont-Ferrand, France, 2002, 10.