Analisa Pengaruh Air Lubrication System Pada Lambung Kapal Terhadap Performa Propeller

Dilianto, Dioba (2016) Analisa Pengaruh Air Lubrication System Pada Lambung Kapal Terhadap Performa Propeller. Undergraduate thesis, Institut Technology Sepuluh Nopember.

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Abstract

Air Lubrication System merupakan salah satu cara yang potensial untuk mengurangi konsumsi bahan bakar dengan cara mengurangi resistensi kapal tanpa perubahan bentuk lambung utama dan penurunan kecepatan operasional melainkan menurunkan komponen terbesar kapal yaitu tahanan gesek (Frictional Resistance). Hal tersebut dilakukan dengan cara memompa udara menggunakan kompresor melalui bawah lambung kapal. Akan tetapi, dimungkinkan air lubrication system akan berpengaruh terhadap performa propeller akibat terikutnya udara (airdrawing) di dalam aliran fluida air yang menuju propeller. Propeler adalah jenis baling-baling yang memberikan kekuatan dengan mengubah gerak rotasi menjadi gaya dorong. Perbedaan tekanan antara depan dan belakang permukaan airfoil berbentuk blade menghasilkan akselerasi air dibelakang blade. Metode bollard pull adalah metode pengujian yang digunakan untuk uji kemampuan tarik pada kapal. Metode tersebut dilakukan dengan cara mengikatkan kapal dengan tambang pada sebuah tonggak sebagai penahan, serta diberi sensor beban/force tranducer. Dari hasil percobaan yang dilakukan dengan metode Bollard pull test, menunjukkan penginjeksian udara di AP pada tekanan kompresor 4.5 bar terjadi penurunan nilai thrust yang besar, dari nilai standar 31.2 N menjadi 20.7 N. Sedangkan di midship dan FP, nilai thrust menjadi 28,4 N dan 27, 9 N. ========================================================================================================= Air Lubrication System is one of potential way to reduce fuel consumption and resistance hull form of the ship without major change or decrease the operational speed but decrease the largest component of the ship that is the frictional resistance. This is doing by using a compressor pump air through the hull of the ship. However, it’s possible water lubrication system will affect the performance of the propeller because of airdrawing in the fluid flow of water towards the propeller. Propeller is the type of propeller type which provides power to transform rotational motion into thrust force. The difference in pressure between the front and rear surface of the airfoil-shaped blade produces acceleration of water behind blade propeller. Bollard pull method is a testing method for ability test of a pull of the ship. The method is done by bunding the ship with a rope on a bollard as a buffer, and using the load sensor / force transducer. From results of experiments conducted by Bollard pull test method, showing injection of air in AP at pressure of 4.5 bar compressor decrease thrust, from the value of the standard 31.2 N to 20.7 N. While at midship and FP, the value of thrust to 28.4 N and 27, 9 N.

Item Type: Thesis (Undergraduate)
Additional Information: RSSP 623.872 36 Dil a
Uncontrolled Keywords: Pelumasan udara, Propeller, Gaya dorong, Bollard pull test
Subjects: V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM731 Marine Engines
Divisions: Faculty of Marine Technology > Marine Engineering > 38201-(S1) Undergraduate Thesis
Depositing User: Mr. Tondo Indra Nyata
Date Deposited: 31 Dec 2019 06:40
Last Modified: 31 Dec 2019 06:40
URI: http://repository.its.ac.id/id/eprint/72485

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