A kind of hull
Technical field
The present invention relates to a kind of hull, particularly a kind of hull that is suitable for navigation in ice region.
Background technology
Boats and ships are in navigation in ice region, and resistance is obviously much bigger than general waters, in order to be used for navigation in ice region, need satisfy the requirement of Finland-Sweden ice level standard, and the required tractive power of the required more non-navigation in ice region of tractive power of its main frame is much bigger; The boats and ships that tonnage is high more, its required tractive power is also big must be many more.For example for the oil tanker of 50000 load-carryings tonne, the required tractive power of conventional non-navigation in ice region satisfies Finland-required then about 20000kW of tractive power of Sweden's ice level standard between 10000-11000kW.And generally speaking, boats and ships need in the time of navigation in ice region much larger than it in the time of non-navigation in ice region to need, and make that like this boats and ships economy in the time of most non-navigation in ice region that satisfies Finland-Sweden's ice level code requirement is very poor.
Summary of the invention
The objective of the invention is to overcome above-mentioned shortcoming, a kind of navigation in ice region resistance that reduces be provided, can satisfy the requirement of Finland-Sweden ice level standard, can reduce again marine main engine tractive power, improve the hull of the economy of ship's navigation.
Hull of the present invention, the size at the influent stream angle at and arranged on left and right sides 1/4th wide places of all waterlines between its least draft waterline and the draft extreme waterline is spent between 26 degree between 20.
Because boats and ships are when navigation in ice region, it is its open circuit that there is icebreaker in its place ahead, therefore, the main resistance of its navigation comes from the trash ice that icebreaker open circuit back forms, when boats and ships navigate by water forward, these trash ices mainly act on and arranged on left and right sides waterline 1/4th wide to 1/2nd wide positions of hull, can be good at reducing the suffered resistance of hull as long as reduce the size of hull and arranged on left and right sides waterline four/the influent stream angle at wide place so, thereby reduce the required tractive power of marine main engine.Yet the influent stream angle can not be too little, if too little, then its displacement influence to hull is bigger, thereby the influent stream angle is controlled at 20 degree between 26 degree, so both guaranteed the displacement of hull, and greatly reduced boats and ships again and satisfy Finland-required tractive power of Sweden's standard.Show that through simulated experiment when satisfying boats and ships that Finland-Sweden's standard adopts hull of the present invention in navigation in ice region, its main frame tractive power is about the 55%-60% of the marine main engine tractive power that adopts general hull.
Description of drawings
Fig. 1 is the scheme drawing of profile;
Fig. 2 is the scheme drawing at hull waterline influent stream angle.
The specific embodiment
Embodiment 1, described hull, and the size at the influent stream angle 3 at and arranged on left and right sides 1/4th width places of all waterlines is between 20 degree are spent to 26 between its least draft waterline 2 and the draft extreme waterline 1.
Embodiment 2, described hull, each is unequal for the size at the influent stream angle 3 at and arranged on left and right sides 1/4th wide places of all waterlines between its least draft waterline 2 and the draft extreme waterline 1, the size at the influent stream angle 3 at 1/4th places of the width of least draft waterline 2 is 26 degree, and the size at the influent stream angle 3 at 1/4th places of draft extreme waterline 1 width is 20 degree.
Embodiment 3, described hull, and the size at the influent stream angle 3 at 1/4th places of least draft waterline 2 and arranged on left and right sides width is 26 degree, the size at the influent stream angle 3 at 1/4th places of draft extreme waterline 1 and arranged on left and right sides width is 20 degree.
Embodiment 4, described hull, and the size at the influent stream angle 3 at and arranged on left and right sides 1/4th wide places of all waterlines between its least draft waterline 2 and the draft extreme waterline 1 is between 20.5 degree are spent to 23.5.
Embodiment 5, described hull, and the size at the influent stream angle 3 at 1/4th places of its least draft waterline 2 and arranged on left and right sides width is 23.5 degree, the size at the influent stream angle 3 at 1/4th places of draft extreme waterline 1 and arranged on left and right sides width is 20.5 degree.
Embodiment 6, described hull, each is unequal for the size at the influent stream angle 3 at and arranged on left and right sides 1/4th wide places of all waterlines between its least draft waterline 2 and the draft extreme waterline 1, the size at the influent stream angle 3 at 1/4th places of the width of least draft waterline 2 is 23.5 degree, and the size at the influent stream angle 3 at 1/4th places of draft extreme waterline 1 width is 20.5 degree.
Embodiment 7, and the size at the influent stream angle 3 at 1/4th places of the width of least draft waterline 2 and arranged on left and right sides is 25.5 degree, and the size at the influent stream angle 3 at 1/4th places of draft extreme waterline 1 and arranged on left and right sides width is 25.5 degree.
Embodiment 8, and described hull, the equal and opposite in direction at the influent stream angle 3 at and arranged on left and right sides 1/4th wide places of all waterlines between its least draft waterline 2 and the draft extreme waterline 1 are 25.5 degree.