Resistance Analysis for the Application of Flowbow on DTMB 5415 Ship

Arga Setya Andreardani (Department of Naval Architecture, Sepuluh Nopember Institute of Technology (ITS) , Surabaya, 60117, Indonesia)
I Ketut Suastika (Department of Naval Architecture, Sepuluh Nopember Institute of Technology (ITS) , Surabaya, 60117, Indonesia)
Baharuddin Ali (Research Center for Hydrodynamics Technology, BRIN, Surabaya, 60117, Indonesia)
Taufiq Arif Setyanto (Research Center for Hydrodynamics Technology, BRIN, Surabaya, 60117, Indonesia)
Mahendra Indiaryanto (Research Center for Hydrodynamics Technology, BRIN, Surabaya, 60117, Indonesia)
Amalia Ika Wulandari (Department of Naval Architecture, Institut Teknologi Kalimantan, 76127, Balikpapan, Indonesia)
Anson Novendra Pradana (West Japan Fluid Engineering Laboratory CO., LTD. Japan)

Indonesian Journal of Maritime Technology or abbreviated (ISMATECH)
Vol. 4 No. 1 (2026): Volume 4 Issue 1, June 2026

Flowbow is an innovation designed by Rasmussen to increase fuel efficiency by reducing wave making resistance of ship. It is claimed that Flowbow can reduce the resistance of displacement and semi-displacement hull type at Froude number (Fr) over 0.25 to 0.28. On a warship, resistance reduction can increase the patrolling endurance by reducing energy used to moving. This research comparing the hull of DTMB 5415 model, which is already using bulbous bow and the modified DTMB 5415 hull with the addition of Flowbow using CFD which is validated by EFD. The results show that the addition of a Flowbow reduces ship resistance at Fr greater than 0.249 and the resistance reduction increases as the ship speed increases. At the highest tested speed (Fr = 0.352), the total resistance reduction reaches 8.57%.