Experimental and numerical study of the resistance component interactions of catamarans

Abstract

The paper presents the results of experimental and numerical investigations into the calm water resistance characteristics of slender catamarans and the interference effects of hull separation. The model hull forms comprise modern symmetrical catamaran hulls with lateral separation. A series of tests were conducted in a towing tank with lateral separation of the hulls of Sc/L = 0.2 -0.4 and speeds corresponding to Froude number up to 0.65. Tests were carried out in a low speed wind tunnel to determine viscous interference effects between the hulls. Numerical computational fluid dynamics modelling was also used to estimate interference effects on the resistance components. It was found that the experimental and numerical investigations were in excellent agreement and provide satisfactory estimates of the resistance components. Results in the paper offer some practical data and further insight into wave and viscous interference effects.

Influence of hull entrance angle “Perintis 750 DWT”, toward ship resistance: the case study for design development “Perintis 750 DWT.”

“…The calculation of ship resistance using Tdyn has been carried out by Samuel et al [8] and Iqbal et al [9]. Their CFD results are relatively good with the empirical equation proposed by Jamaluddin [10].…”

Analisa Komponen Hambatan Kapal Ikan Tradisional Di Perairan Cilacap

“…Hullspeed menghitung dan menambahkan komponen hambatan viskos dengan menggunakan perhitungan koefisien gesek dan faktor bentuk yang ditentukan ITTC '57. Sedangkan Komponen hambatan kapal Catamaran dinyatakan dengan persamaan 6-12 (Jamaluddin et al, 2012) …”

“…Salah satu hal yang membuat kapal Catamaran menjadi populer dan banyak diaplikasikan karena adanya area geladak (deck area) yang lebih luas dan tingkat stabilitasnya yang lebih nyaman dan aman. Disamping itu kapal Catamaran dengan bentuk badan yang langsing (slender) dapat memperkecil timbulnya sibakan air (wave wash) dibanding kapal monohull (Jamaluddin et al, 2012).…”

“…Salah satu hal yang membuat kapal Catamaran menjadi populer dan banyak diaplikasikan karena adanya area geladak (deck area) yang lebih luas dan tingkat stabilitasnya yang lebih nyaman dan aman. Disamping itu kapal Catamaran dengan bentuk badan yang langsing (slender) dapat memperkecil timbulnya sibakan air (wave wash) dibanding kapal monohull (Jamaluddin et al, 2012).Salah satu aspek yang perlu diperhatikan pada kapal Catamaran adalah keakurasian dalam mengestimasi hambatan pada tahapan awal proses design, dimana hambatan kapal merupakan aspek yang sangat penting diketahui untuk menghitung daya mesin suatu kapal. …”

Reduction of demi-hull wave interference resistance in fast displacement catamarans utilizing an optimized centerbulb concept

“…The centerbulb idea was also used by Bruzzone et al (2008) and Zotti (2006Zotti ( , 2007 and its effect on both resistance and sea keeping performance of catamarans has been experimentally investigated. A recent study by Jamaluddin et al (2013) was carried out to investigate the effect of hull separation on the viscous and wave interference resistance.…”