Comparative experimental research on fishing vessel's bulbous bow model in resistance reduction and energy conservation

Specific to the objective hull form,it comes to a kind of basic hull form which doesn't have bulbous bow after analysis the main dimension and form,by adding the bulbous bow with a view to further resistance reduction and energy conservation.Make a general analysis to the bulbous bow,and match three kinds of different sizes SV-type bulbous bow for the involved hull form to research,we get a quantified comparative result and optimization type through the model test.After matching three kinds of bulbous bow,resistance is reduced by 4.4%~10.4% in upright state and by 15.7%~16.0% in trim state when design speed Fn=0.325.For this fishing vessel is usually trim,after applying the bulbous bow forward to further resistance reduction of about 16%,and PE/Δ reduced to 0.429 kW/t,so it achieves the desired objective of reduce resistance and save energy.This research results have reference value for fishing vessel or other type of ships.