Experimental investigation of single blade and propeller loads by free running model test. Straight ahead sailing

Ortolani, Fabrizio; Dubbioso, Giulio

doi:10.1016/j.apor.2019.03.005

Cited by 20 publications

(4 citation statements)

References 19 publications

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“…The rotation of a propeller is realized by implementing a sliding technique, and the propeller eccentric force could be directly calculated during the simulation. Unlike previous studies with high-speed navy vessels [6,8,9,[11][12][13][14], the target vessel had a relatively low speed and was operated conservatively meaning that, ship motion such as a heeling during the turning was not considered. The rudder angle for each turning direction in the numerical simulation was defined as being the same as the value of official turning circle test.…”

Section: Definition For Maneuvering Conditionmentioning

confidence: 99%

“…From their study, it can be inferred that the wake is significantly affected by the appendages around the propeller during ship turning. Ortolani and Dubbioso [13,14] measured the single blade loads on propellers during a free-running operation; a straight ahead and a steady turning motion. Their experimental data provided the insight to understand the interaction between the wake and the propeller.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Rudder Existence on Propeller Eccentric Force

Song¹,

Park²,

Lee³

2019

JMSE

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In order to design a safe shafting system in a ship, it is vital to precisely predict load on stern tube bearing. It is well known that load on stern tube bearing is directly influenced by the eccentric force of a propeller. In this paper, the effect of rudder existence on propeller eccentric force was studied based on numerical analysis with a 10,000 TEU class container vessel. To obtain propeller eccentric force, numerical simulations including propeller rotation motion using a sliding mesh technique were carried out. When a ship is turning, propeller eccentric force significantly changes compared to those of straight run. For starboard turning especially, the propeller vertical moment was decreased by about 50% due to the existence of a rudder compared to that without a rudder. In contrast, as for port turning, the results of simulations with and without a rudder were similar to each other. This difference is fundamentally due to the interaction between the direction of propeller rotation and the inflow direction to a propeller. Based on this study, it is inferred that the influence of appendages around a propeller need to be considered to ensure the reliable prediction of propeller eccentric force.

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Section: Definition For Maneuvering Conditionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Effect of Rudder Existence on Propeller Eccentric Force

Song¹,

Park²,

Lee³

2019

JMSE

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“…9 In the future, the propeller will have many features including integration, bionics, efficiency and the others. [10][11][12] Nowadays, the integrated motor propeller is one of the best propellers, applying integrated design and electronic reversing technology to improve the reliability of the propeller. 13 The integrated motor propeller is widely utilized in the underwater devices needed external thrust.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic performance analysis of the rim electromagnetic direct-driven propeller

Zhang

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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Propellers are a crucial part to drive underwater vehicles. A rim electromagnetic direct-driven propeller (REDP) had been presented to meet some specific requirements of the underwater vehicle in this paper. It had many advantages compared to classical propellers and could improve the performance of the underwater vehicle. The composition and working mode of REDP were introduced here. In addition, the paper also introduced the working characteristics of REDP and somethings needed to be improved. The energy method was utilized to calculate the distribution of magnetic fields. A three-dimensional model of REDP was built. Then the influence of the propeller’s parameters on performance was analyzed, including the number, pattern, surface radian of the permanent magnet and the stator cogging skew, by finite element computing models. The performances of REDP were tested under several parameters. Some valuable conclusions were obtained according the test results and could provide a reference for the design and performance optimization of REDP utilized on the underwater vehicle.

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“…Seiring berkembanya teknologi, penelitian untuk meningkatkan sistem propulsi kian berkembang dengan mempertimbangkan kondisi off-design yang realistis yang dialami oleh kapal dan sistem propulsi. Hal tersebut untuk meningkatkan efisiensi operasional kapal hingga keselamatan dilaut (Ortolani and Dubbioso, 2019). Pada tahun 1660, dipatenkan sistem propulsi dengan sistem tertutup.…”

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Uji Performa Waterjet Thruster Produk 3D Printing Material Super Tought Polylactic Acid Terhadap Gaya Dorong

Seva,

Hasdiansah

2024

JQT

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In the world of transportation, there are many things that must be considered, ranging from safety to efficiency. Propulsion system planning is very important, this is because the system is a thrust generator that will determine the performance of the ship. The thrust generated must be able to overcome the resistance or friction of the ship with water. In recent times, many studies have been conducted to improve the performance and efficiency of the waterjet thruster. In this research, the performance of the waterjet thruster will be tested with variations in the number of inlet blades and the number of turbo outlet blades. The levels used are 8 blades and 15 blades. The manufacturing process on waterjet thruster components such as inlet, impeller, and turbo outlet uses Fused Deposition Modeling (FDM) technology to obtain high dimensional accuracy. From the research conducted, it can be concluded that the number of blades at the turbo inlet and outlet has a major effect on the thrust generated. The turbo outlet has a greater role than the inlet in influencing the thrust force. From the research conducted by Nori and this study, it can be concluded that the turbo outlet with 8 blades produces the highest thrust force compared to 6 blades and 15 blades.

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Experimental investigation of single blade and propeller loads by free running model test. Straight ahead sailing

Cited by 20 publications

References 19 publications

The Effect of Rudder Existence on Propeller Eccentric Force

The Effect of Rudder Existence on Propeller Eccentric Force

Electromagnetic performance analysis of the rim electromagnetic direct-driven propeller

Uji Performa Waterjet Thruster Produk 3D Printing Material Super Tought Polylactic Acid Terhadap Gaya Dorong

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