Bulbous Bow Function, Advantages, Uses and Location

     Bulbous bow is a projecting globule situated at the bow of a ship just underneath the waterline. Bulbous bow  reduces the hull wave making resistance of a ship, which is the major residuary frictional resistance of the ship.

   When the water is cut by the bulbous bow, mainly two types of waves  are formed ; primary wave and secondary wave. The primary wave  formed by the bow, just in front of the bow  cuts the secondary wave formed by the ship hull, thereby reducing drag.


> Floors are fitted at every frame space in the bulb when bulb is large

> Transverse are fitted at about every fifth frame in long bulbs

> Smaller bulbs have centerline web 

> All bulbous bow horizontal diaphragms are fitted 

> Shell plating covering bulb has increased shell plating

> Increase propulsion efficiency
> Increase fuel efficiency
> Increase ship speed
> Increase stability
> Reduce dragging
> Reduce fuel consumption 
> Reduce pitching
> Act as BUMPER in collision. 

Image credit:- www.green4sea.com

Post a Comment

>> Your Comments are always appreciated...
>> Discussion is an exchange of knowledge It Make the Mariner Perfect.... Please Discuss below...

Previous Post Next Post