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Brodogradnja : An International Journal of Naval Architecture and Ocean Engineering for Research and Development, Vol. 74 No. 4, 2023.

Izvorni znanstveni članak

https://doi.org/10.21278/brod74403

Analysis of the double steps position effect on planing hull performances

Andi Trimulyono ; Department of Naval Architecture, Faculty of Engineering, Universitas Diponegoro
Muhammad Luqman Hakim orcid id orcid.org/0000-0003-4677-1831 ; Department of Naval Architecture, Faculty of Engineering, Universitas Diponegoro
Chairizal Ardhan ; Department of Naval Architecture, Faculty of Engineering, Universitas Diponegoro
Syaiful Tambah Putra Ahmad ; Department of Naval Architecture, Faculty of Engineering, Universitas Diponegoro
Tuswan Tuswan ; Department of Naval Architecture, Faculty of Engineering, Universitas Diponegoro
Ari Wibawa Budi Santosa ; Department of Naval Architecture, Faculty of Engineering, Universitas Diponegoro

Puni tekst: engleski pdf 2.920 Kb

str. 41-72

preuzimanja: 271

citiraj

Sažetak

Along with developing high-speed craft technology, the planing hull is growing with modifications for better performance. One such technology is stepped hull, both single and double. Planing hull with steps allows the boat to run at a relatively low drag-lift ratio with lower frictional resistance due to reduced wetted area. In this study, the hull was modified with variations in the position of the double steps, which aimed to determine the effect of the first and second step positions on the total resistance, dynamic trim, and dynamic sinkage generated by computational fluid dynamics (CFD). Based on the analysis results, variations in the position of the stepped can change the hull performance. Shortening the distance between the two steps and moving both rearwards toward the transom can lower the total resistance. The dynamic trim and dynamic sinkage decreased as the position of the two steps was shifted further forward. An equation created in a non-dimensional form relates the positions of two steps to the desired results of total resistance, dynamic trim, and dynamic sinkage, namely: {(x1-x2)/L + (x1x2)/(LB)} × Fr∇, where x1 is distance the first step from transom, x2 is the distance of the second step, L is the length of the boat, B is the beam of the boat, and Fr∇ is the volume Froude number.

Ključne riječi

double steps position; planing hull performances; step hull; boat resistance; Computational Fluid Dynamics (CFD)

Hrčak ID:

307080

URI

https://hrcak.srce.hr/307080

Datum izdavanja:

1.9.2023.

Posjeta: 478 *