Micro-Bubble drag reduction with triangle bow and stern configuration using porous media on self propelled barge model

2nd international Tropical Renewable Energy Conference 2017

Yanuar^1 ; Waskito, K.T.^1 ; Rahmat, B.A.^1 ; Perdana, A.Y.^1 ; Candra, B.D.^1

Department of Mechanical Engineering, University of Indonesia, Jakarta

16424, Indonesia^1

关键词: Air injection ratio;    Frictional resistance;    Injection ratio;    Micro-bubble;    Reduction effects;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/105/1/012094/pdf
DOI  :  10.1088/1755-1315/105/1/012094

来源: IOP

【 摘 要 】

Drag reduction on ship to decrease fuel consumption and achieve higher speeds has became the topic since the last decades. One of the most atractive idea is micro-bubble, in order to reduce frictional resistance. The purpose of this research is to identify micro-bubble drag reduction effect on Self Propelled Barge Model at 1:28 scale. The influences of air injection ratio and speed will also be investigated. Five injection ratio were used in this experiments; 0,2; 0,3; 0,4; 0,5; and 0,6. Experiments were done in the towing tank, member of ITTC. Micro-bubble was injected on bow and midship using two configurations; triangle stern and triangle bow. The results show that triangle stern is the best configuration with 5% - 40% drag reduction at 0,2; 0,3; and 0,4 injection ratio.