Marine Propulsion by the Injection of Compressed Air Ouafae Bennis, Lakhdar Khochemane, A. H. E. Gherouat
To cite this version:
Ouafae Bennis, Lakhdar Khochemane, A. H. E. Gherouat. Marine Propulsion by the Injection of Compressed Air. International Journal of Engineering Science and Technology, Engg Journals Publi- cations, 2016, 10.21817/ijet/2016/v8i6/160806406. hal-02455401
HAL Id: hal-02455401 https://hal.archives-ouvertes.fr/hal-02455401 Submitted on 26 Jan 2020
HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/312100246
Marine Propulsion by the Injection of Compressed Air
Article in International Journal of Engineering and Technology · December 2016 DOI: 10.21817/ijet/2016/v8i6/160806406
CITATIONS READS 0 443
3 authors:
Gherouat Ahmed Houssem Eddine Khochemane Lakhdar Université 20 août 1955-Skikda University of 20August 1955 Skikda
1 PUBLICATION 0 CITATIONS 24 PUBLICATIONS 75 CITATIONS
SEE PROFILE SEE PROFILE
Ouafae Bennis Université d'Orléans
35 PUBLICATIONS 80 CITATIONS
SEE PROFILE
Some of the authors of this publication are also working on these related projects:
Vibration View project
extended Kalman filter for PMSM View project
All content following this page was uploaded by Ouafae Bennis on 19 January 2017.
The user has requested enhancement of the downloaded file. ISSN (Print) : 2319-8613 ISSN (Online) : 0975-4024 A. H. E. Gherouat et al. / International Journal of Engineering and Technology (IJET)
Marine Propulsion by the Injection of Compressed Air A. H. E. Gherouat1, L. Khochemane2, O. BENNIS3 1Mechanical Engineering Department, 2Department of petrochemical Engineering, 3Multidisciplinary laboratory of mechanical and energetic system. 1University of 20 Août 1955 Skikda ALGERIA, 2University of 20 Août 1955 Skikda ALGERIA, 3University of Orleans FRANCE 1 [email protected],[email protected],[email protected], Abstract—Most of the variables which has an influence on the propulsion: the compression Ratio, for naval engine, water is a substance that has a very weak compression effect that for it is considered as an incompressible liquid, that effect directly the efficiency of propulsion and make it weaker, to make a biphasic mixture with mixing compressed air in water in form of bubbles injected, causes the relaxation which adds a complementary force of reaction for the primary force, by the way the existences of air bubbles creates an interruption in continuous environment which is water so it avoids the dissipation of the applied force by the blades and increases the reaction force. Keywords: Boat, ship propulsion, hydrodynamics, resistance, friction, density, push, sea water, compressed air, injection I. INTRODUCTION The maritime propulsion does not know a great development compared to the other transportation, its development came with the development of engines which actuate the blades, an upgrading capability is possible intervening on the multiple parameters and elements in direct contact with maritime environment, this article presents a work to carry out on the factor of compressibility upstream is downstream from the propeller. The maritime propulsion is the main tool of pushing used for boats, is also important to it to care of the load capacity that one boat can transport seen that it floats, this phenomenon explained by Archimedes as a force to push upwards like a reaction to the weight, on the other hand the displacement of the transportation is done according to the pushing by the reaction of the propeller and the force of resistance of the fluid, that for the weight does not make a problem what makes boat the best means of transport of merchandise, just remains the problem of resisting forces. II. RESISTANCE ON THE BOAT Resistance is considered by the force K, defined as the force exerted by the dynamic pressure of the water at the speed V of the boat on a surface which is equal to the wetted area of hull A to multiply by a coefficient of friction relating to the type of force[1]. A. Resistance of the air In calm weather, air resistance is proportional to the square of the speed boat and proportional to the section of the ship above the waterline. The air resistance is normally about 2% of the resistance against for container ships can be up to 10%, even it represents 90% of the dynamic pressure of the air at the speed of the boat [2].