CN101005986A - Flow control device of discharge water for ship refrigeration - Google Patents
Flow control device of discharge water for ship refrigeration Download PDFInfo
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- CN101005986A CN101005986A CNA2006800005704A CN200680000570A CN101005986A CN 101005986 A CN101005986 A CN 101005986A CN A2006800005704 A CNA2006800005704 A CN A2006800005704A CN 200680000570 A CN200680000570 A CN 200680000570A CN 101005986 A CN101005986 A CN 101005986A
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- cooling water
- control device
- dynamic control
- water outlet
- hull
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/16—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in recesses; with stationary water-guiding elements; Means to prevent fouling of the propeller, e.g. guards, cages or screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
- B63B1/32—Other means for varying the inherent hydrodynamic characteristics of hulls
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
The invention provides a device for controlling buttock flow field shuffled by cooling water discharged from cooling water outlet of ship. The device is mounted in range from the cooling water outlet to a position having distance as three times of the outlet diameter, the setting angle of the device is 16-30 degree relative to hull horizon plane, width in hull height direction is 0.2-0.6 times of the outlet diameter, width in hull length direction is 0.5-1.3 times of the outlet diameter. According to the invention, restoring cocurrent distribution of the airscrew to axial symmetry relative to the hull cenreal shaft can reduce generation of cavern, thereby raise vibration proof of ship and increase propulsive efficiency.
Description
Technical field
The present invention relates to a kind of flow control apparatus, confuse in the flow field that is used to prevent the discharge orifice rear that produced by the cooling water expansion tank of discharging by the cooling water outlet on the machinery room portion larboard side that is arranged on the LNG carrier that uses steam engine, thus the vibration that alleviates hull.
Background technology
Existing LNG carrier is owing to the liquefied natural gas gasifying in the cargo hold produces BOG (Boil offGas).Because this BOG is liquefied once more needs high cost, therefore utilize the BOG that in using the cargo hold of steam turbine (Steam Turbine), is produced to act as a fuel as the LNG carrier of main wheel machine.Turbo-machine uses steam, but as the device that is used to make this steam cooling, must need condenser etc.System as making this condenser cooling adopts the catcher type of cooling (catcher cooling system) or the pump type of cooling (pump cooling system).In this system, the inlet portion (cooling water expansion tank sucking hole) and the export department's (cooling water outlet) that receive seawater are separately positioned on the hull surface.Catcher type of cooling middle outlet portion gives prominence to with being the lip shape, and pump type of cooling middle outlet portion does not form the lip shape.
When just tail was watched behind the hull from the machinery room portion larboard side of LNG carrier, this cooling water outlet was positioned at the left side of tail behind the hull.In case cooling water expansion tank is discharged by above-mentioned cooling water outlet, then the flow field of tail will be disturbed behind the cooling water outlet, the axial flow acceleration on the screw propeller top that can feasiblely flow into screw propeller is confused in the flow field of tail behind the hull as described above, thereby makes the distribution of wake change with respect to the asymmetric shape of hull center shaft ground.When screw propeller being arranged on the rear side of model ship or true ship, on one side work in the fluid that screw propeller is disturbed by hull on one side, in general, the fluid around the hull becomes slow because of ship, with this mobile wake that is called that becomes slow.
When this fitfull wake was distributed in screw propeller work, the load that is applied on the screw propeller was inhomogeneous, periodically power and moment is applied on the screw propeller, becomes the cause of ship vibration.Compare with the occasion that does not have draining, produce very big propeller cavitation, increased about two-fold hull fluctuating pressure.So-called cavity (cavitation) is meant that at a certain temperature ambient pressure drops to below the vapor tension, becomes vaporous phenomenon from aqueous.
The increase of this hull pressure variation not only makes ship vibration increase, and the propulsion quality of hull is descended.
This cooling water expansion tank is disturbed the stern flow field, and the stern flow field after confusing makes wake distribute with respect to the asymmetric variation of the center shaft of hull, thereby the mechanics that increases ship vibration is unknown in the prior art.
Summary of the invention
For addressing the above problem the present invention is proposed.The purpose of this invention is to provide a kind of wash dynamic control device, confused by the caused stern of the cooling water expansion tank flow field of discharging from cooling water outlet by preventing, and ship vibration is alleviated, the propulsion quality of boats and ships improves.
For reaching above-mentioned technical purpose, the invention provides a kind of wash dynamic control device, it is a kind of device that is used to control by the stern flow field that cooling water expansion tank confused of discharging from the cooling water outlet of boats and ships, it is characterized in that, this device is arranged on from above-mentioned cooling water outlet in the distance range that is no more than 3 times of this outlet diameters, the setting angle of said apparatus is for to become 16～30 ° with respect to the hull horizontal surface, the width of the hull height direction of said apparatus is 0.2～0.6 times of outlet diameter, and the width of the ship length direction of said apparatus is 0.5～1.3 times of outlet diameter.Said apparatus not only is applicable to the catcher type of cooling but also be applicable to the pump type of cooling.Cause eddy current by the place ahead at cooling water outlet, so that the cooling water expansion tank of discharging does not arrive at the stern flow field, or by change the mobile route of cooling water expansion tank at the rear of cooling water outlet, so that the cooling water expansion tank of discharging does not arrive at the stern flow field.
Said apparatus is preferably 0.2～0.6 times of outlet diameter apart from the distance of ship hull plate.
For reaching above-mentioned technical purpose, the invention provides the wash dynamic control device, it is a kind of device that is used to control by the stern flow field that cooling water expansion tank confused of discharging from the cooling water outlet of boats and ships, it is characterized in that, said apparatus be positioned at along the streamline by above-mentioned cooling water outlet and apart from 1 station, above-mentioned cooling water outlet the place ahead (station) distance with the pyrometric cone shape of position, the bottom surface of above-mentioned pyrometric cone is an equicrural triangle, the length on the base of described equicrural triangle is 0.2～0.3 times of above-mentioned cooling water outlet diameter, the length of the altitude line of bottom surface is 1.5～1.7 times of outlet diameter, from the length of perpendicular of summit to the bottom surface of pyrometric cone is 0.6～0.8 times of outlet diameter, and the angle of above-mentioned bottom surface altitude line and streamline is 10～15 °.Said apparatus not only is applicable to the catcher type of cooling but also be applicable to the pump type of cooling.Cause eddy current by the place ahead, so that the cooling water expansion tank of discharging does not arrive at the stern flow field at cooling water outlet.
Above-mentioned wash dynamic control device be positioned at along the streamline by cooling water outlet and apart from above-mentioned cooling water outlet the place ahead 0.8 stop spacing from the position.
For reaching above-mentioned technical purpose, the invention provides the wash dynamic control device, it is a kind of device that is used to control by the stern flow field that cooling water expansion tank confused of discharging from the cooling water outlet of boats and ships, it is characterized in that, said apparatus is installed on the place ahead outer peripheral face of above-mentioned cooling water outlet, has the scalene shape that upper height and lower height with respect to hull surface do not wait.Said apparatus not only is applicable to the catcher type of cooling but also be applicable to the pump type of cooling.Cause eddy current by the place ahead, so that the cooling water expansion tank of discharging does not arrive at the stern flow field at cooling water outlet.
The upper height of above-mentioned wash dynamic control device is preferably 0.3～0.5 times of center-line-average of above-mentioned wash dynamic control device.The lower height of above-mentioned wash dynamic control device is preferably 1.5～1.7 times of center-line-average of above-mentioned wash dynamic control device.
Description of drawings
Fig. 1 is the block diagram of boats and ships that expression is equipped with the wash dynamic control device of one embodiment of the present invention.
Fig. 2 is the lateral plan of the embodiment of presentation graphs 1.
Fig. 3 is the wash dynamic control device of presentation graphs 1 embodiment when being installed in the rear of cooling water outlet, the view of watching screw propeller surface current speed to distribute from stern.
Fig. 4 is the wash dynamic control device of presentation graphs 1 embodiment when being installed in the rear of cooling water outlet, the view of hull fluctuating pressure.
Fig. 5 is the block diagram of boats and ships that expression is equipped with the wash dynamic control device of the present invention's the 2nd embodiment.
Fig. 6 is the block diagram of the embodiment of presentation graphs 5.
Fig. 7 is illustrated in when not discharging cooling water expansion tank, watches the view of screw propeller surface current speed distribution from stern.
Fig. 8 is illustrated in when discharging cooling water expansion tank, watches the view of screw propeller surface current speed distribution from stern.
Fig. 9 is when being illustrated in the wash dynamic control device that Fig. 5 embodiment is installed, and watches the view of screw propeller surface current speed distribution from stern.
Figure 10 is that expression corresponds respectively to when discharging cooling water expansion tank, when not discharging cooling water expansion tank and when the wash dynamic control device of embodiment shown in Figure 5 is installed, the view of the unit volume in cavity.
Figure 11 is the block diagram of boats and ships that expression is equipped with the wash dynamic control device of the present invention's the 3rd embodiment.
Figure 12 is the block diagram of the embodiment of expression Figure 11.
Figure 13 is when being illustrated in the wash dynamic control device that Figure 11 embodiment is installed, and watches the view of screw propeller surface current speed distribution from stern.
Figure 14 is that expression corresponds respectively to when discharging cooling water expansion tank, when not discharging cooling water expansion tank and when the wash dynamic control device of embodiment shown in Figure 11 is installed, the view of the unit volume in cavity.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the present invention are elaborated.
The flow control apparatus of cooling discharge water of the present invention, according to the diameter of boats and ships size and cooling water outlet, the size of this flow control apparatus, thickness, installation site etc. change.The boats and ships length that the wash dynamic control device of present embodiment is installed is 270 meters, and the diameter of cooling water outlet that is formed on the quarter of a ship of above-mentioned boats and ships is 1.8 meters.This moment, so-called length was exactly the distance (LBP) between fore vertical line and the after perpendicular.The fore vertical line be meant by the fwd intersection point of design vertical line and fore material and with design the vertical line of vertical line.After perpendicular is meant in the boats and ships with clear and definite rudder post (rudder post), by the inside of rudder post and the perpendicular line of the intersection point of design vertical line, in the boats and ships that do not have clear and definite rudder post, be meant by the line of centers of rudder stock (rudder stock) and the perpendicular line of the intersection point of design vertical line.
(the 1st embodiment)
Fig. 1 is the block diagram of boats and ships that expression is equipped with the wash dynamic control device of an embodiment of the present invention.Fig. 2 is the lateral plan of the embodiment of presentation graphs 1.As shown in Figure 1, will be used to make the screw propeller 200 of propulsion of ship to be arranged on the rear side of quarter of a ship.Cooling water outlet 202 is arranged on the front side of above-mentioned screw propeller, on the semicircle position, front side of etcetera 204 with the lip shape attached to above-mentioned cooling water outlet 202.
The wash dynamic control device 206 of present embodiment is positioned at from above-mentioned cooling water outlet 202 to the distance range L1 that is no more than 3 times of above-mentioned cooling water outlet 202 diameters, is preferably placed at the rear of above-mentioned cooling water outlet 202.The wash dynamic control device 206 of present embodiment is installed on the outside plate of hull by methods such as welding.
The wash dynamic control device 206 of present embodiment is made up of rectangular thin plate.The wash dynamic control device 206 of present embodiment is to become 16～30 ° angle attached on the ship hull plate with respect to hull horizontal surface or floating line.The wash dynamic control device 206 of present embodiment is in the width H3 of hull height direction is defined as 0.2～0.6 times of scope at discharge orifice 202 diameters.The wash dynamic control device 206 of present embodiment is in the width L2 of ship length direction is defined as 0.5～1.3 times of scope at discharge orifice 202 diameters.The wash dynamic control device 206 of present embodiment is defined as in 0.2～0.6 times of scope of above-mentioned cooling water outlet 202 diameters apart from the distance L 3 of ship hull plate.
The setting angle of the wash dynamic control device 206 of present embodiment less than 16 ° or the width H3 of hull height direction less than 0.2 times of discharge orifice 202 diameters or at the width L2 of ship length direction less than 0.5 times of discharge orifice 202 diameters or apart from the distance L 3 of ship hull plate during less than 0.2 times of discharge orifice 202 diameters, stern FLOW CONTROL effect will descend.The setting angle of the wash dynamic control device 206 of present embodiment greater than 30 ° or the width H3 of hull height direction greater than 0.6 times of discharge orifice 202 diameters or at the width L2 of ship length direction greater than 1.3 times of discharge orifice 202 diameters or apart from the distance L 3 of ship hull plate during greater than 0.6 times of discharge orifice 202 diameters, will increase by the wash dynamic control device 206 caused additional resistances of present embodiment.
When the wash dynamic control device 206 of present embodiment is installed in the place ahead of cooling water outlet 202, the wash dynamic control device 206 of present embodiment will cause eddy current in the place ahead of above-mentioned cooling water outlet 202.Above-mentioned eddy current makes above-mentioned cooling water expansion tank break away from from the mobile route of the wash dynamic control device 206 above-mentioned cooling water expansion tank before of installation present embodiment.Just, the wash dynamic control device 206 of present embodiment makes the distribution of the wake that flows into screw propeller change symmetrically with respect to the hull center shaft, thereby makes cooling water expansion tank not arrive the wash field.
When the wash dynamic control device 206 of present embodiment is installed in the rear of cooling water outlet 202, the wash dynamic control device 206 of present embodiment changes the mobile route of cooling water expansion tank, the distribution of the wake that flows into screw propeller is changed symmetrically with respect to the hull center shaft, thereby make cooling water expansion tank not arrive the wash field.
Fig. 3 is the wash dynamic control device that is illustrated in Fig. 1 embodiment when being installed in the rear of cooling water outlet, the view of watching screw propeller surface current speed to distribute from stern.At this moment, the distribution of the wake of inflow screw propeller returns to respect to hull center shaft symmetry.Fig. 4 is the wash dynamic control device that is illustrated in Fig. 1 embodiment when being installed in the rear of cooling water outlet, the view of hull fluctuating pressure.The left side figure of Fig. 4 is illustrated in when not having cooling water expansion tank to discharge and the hull fluctuating pressure when having cooling water expansion tank to discharge, and can find out clearly that when discharging cooling water expansion tank, the hull fluctuating pressure is bigger.The right figure of Fig. 4 is illustrated in when not having cooling water expansion tank to discharge and the hull fluctuating pressure when being installed in the rear of cooling water outlet when having cooling water expansion tank to discharge and with the wash dynamic control device of present embodiment, as can be seen clearly, compare with not discharging the cooling water expansion tank situation, the hull fluctuating pressure when discharging cooling water expansion tank and the wash dynamic control device of present embodiment is installed in the rear of cooling water outlet is littler.
The wash dynamic control device of present embodiment is the oblong thin plate, but in other embodiments, its shape also can become triangular sheets etc.
(the 2nd embodiment)
Only present embodiment and the 1st embodiment difference are described below.
Fig. 5 is the block diagram of boats and ships that expression is equipped with the wash dynamic control device of the present invention's the 2nd embodiment.
The wash dynamic control device 306 of present embodiment is installed in the place ahead of above-mentioned cooling water outlet 202, is positioned at along streamline 208 apart from above-mentioned cooling water outlet 202 the only distance at 0.8 station.So-called station is meant border between these intervals after being divided into above-mentioned LBP between 20 same zone.Begin to be numbered from stern, the 1st station be numbered 0, at last the station is numbered 20.In the present embodiment, the distance between standing is 13.5 meters, so 0.8 station is exactly 10.8 meters (13.5 * 0.8).The wash dynamic control device 306 of present embodiment is installed in the place ahead of cooling water outlet 202 by methods such as welding.
Fig. 6 is the block diagram of the embodiment of presentation graphs 5.
The wash dynamic control device 306 of present embodiment is the shape of pyrometric cone.The bottom surface of above-mentioned pyrometric cone is an equicrural triangle, and the length of the base L of above-mentioned bottom surface is 0.46 meter, and the length of the altitude line H1 of above-mentioned bottom surface is 2.87 meters.The length of vertical line from the summit of the pyrometric cone relative with above-mentioned bottom surface (below be called " summit of pyrometric cone ") to the bottom surface (below be called " altitude line of pyrometric cone ") H2 is 1.26 meters.The wash dynamic control device 306 of present embodiment is arranged to make limit S cutting streamline, and above-mentioned limit S connects the summit relative with equicrural triangle base L and the summit of above-mentioned pyrometric cone.That is to say that the summit relative with the base L of equicrural triangle is positioned at bow portion side, above-mentioned base L is positioned at the quarter of a ship side.The bottom surface altitude line H1 of above-mentioned pyrometric cone and the angle of above-mentioned streamline are 14 °.
The wash dynamic control device 306 of present embodiment causes eddy current in the place ahead of above-mentioned cooling water outlet 202.Above-mentioned eddy current makes above-mentioned cooling water expansion tank break away from from the mobile route of the wash dynamic control device 306 above-mentioned cooling water expansion tank before of installation present embodiment.Just, the wash dynamic control device 306 of present embodiment makes the distribution of the wake that flows into screw propeller change symmetrically with respect to the hull center shaft, thereby makes cooling water expansion tank not arrive the wash field.
Fig. 7 is illustrated in when not discharging cooling water expansion tank, watches the view of screw propeller surface current speed distribution from stern.It is apparent that the distribution of the wake of inflow screw propeller is with respect to hull center shaft symmetry this moment.Fig. 8 is illustrated in when discharging cooling water expansion tank, watches the view of screw propeller surface current speed distribution from stern.It is apparent that the distribution of the wake of inflow screw propeller is asymmetric with respect to the hull center shaft this moment.Fig. 9 is when being illustrated in the wash dynamic control device that embodiment shown in Figure 5 is installed, and watches the view of screw propeller surface current speed distribution from stern.It is apparent that the distribution that flows into the wake of screw propeller returns to respect to hull center shaft symmetry this moment.
Figure 10 is that expression corresponds respectively to when discharging cooling water expansion tank, when not discharging cooling water expansion tank and when the wash dynamic control device of embodiment shown in Figure 5 is installed, the view of the unit volume in cavity.As shown in figure 10, compare with the situation that above-mentioned wash dynamic control device 306 is not installed, the unit volume in cavity is maximum to reduce 30%.
In the present embodiment, above-mentioned wash dynamic control device 306 adopts the catcher type of cooling, is installed in the quarter of a ship of boats and ships, but in other embodiments, also can adopts the pump type of cooling, is installed in the quarter of a ship of boats and ships.
In the present embodiment, above-mentioned wash dynamic control device 306 be positioned at apart from cooling water outlet 202 only 0.8 stop spacing from the place ahead, but in other embodiments, wash dynamic control device 306 is positioned at apart from cooling water outlet 202 less than 0.8 station or greater than 0.8 station and less than the position at 1.0 stations.When the position that is positioned at greater than 1.0 stations, the control effect that stern is flowed descends.
In the present embodiment, the length of base, the bottom surface L of wash dynamic control device 306 is 0.46 meter, the length of the altitude line H1 of bottom surface is 2.87 meters, the length of the altitude line H2 of pyrometric cone is 1.26 meters, the altitude line H1 of above-mentioned bottom surface and the angle of streamline are 14 °, but in other embodiments, the length on base, bottom surface can change in 0.2～0.3 times of scope of above-mentioned cooling water outlet diameter, the length of bottom surface altitude line can change in 1.5～1.7 times of scopes of outlet diameter, the length of the altitude line H2 of pyrometric cone can change in 0.6～0.8 times of scope of outlet diameter, and the altitude line H1 of above-mentioned bottom surface and the angle of above-mentioned streamline can change in 10～15 ° of scopes.
The angle that surpasses 0.3 times of above-mentioned cooling water outlet diameter, the length of bottom surface altitude line H1 surpasses 0.8 times of outlet diameter or bottom surface less than 1.5 times of outlet diameter, the length of the altitude line H2 of pyrometric cone altitude line H1 and streamline when the length of base, bottom surface L is during above 15 °, and the pressure drag (pressure drag) that then is applied on the above-mentioned wash dynamic control device 206 is very big.And when the length of base, bottom surface L less than 0.2 times of outlet diameter, the length of the altitude line H2 of pyrometric cone less than the angle of the altitude line H1 of 0.6 times of outlet diameter or bottom surface and streamline during less than 10 °, can not fully form eddy current, therefore reduce stern FLOW CONTROL effect.When the length of bottom surface altitude line surpassed 1.7 times of outlet diameter, the surface of wash dynamic control device 306 and the area of contact of fluid increased, and the friction impedance becomes big.
In the present embodiment, though wash dynamic control device 306 be shaped as the pyrometric cone shape, in other embodiments, also can be other shapes such as quadrangular pyramid or circular cone.
(the 3rd embodiment)
Figure 11 is the block diagram of boats and ships that expression is equipped with the wash dynamic control device of the present invention's the 3rd embodiment.Figure 12 is the block diagram of expression Figure 11 embodiment.
The wash dynamic control device 406 of present embodiment is positioned on the place ahead circumference of cooling water outlet 202, forms the scalene structure that upper height L4 and lower height L5 do not wait.Upper height L4 determines that in 0.3～0.5 times of scope of the center-line-average of the wash dynamic control device 406 of present embodiment, lower height L5 determines in 1.5～1.7 times of scopes of the center-line-average of the wash dynamic control device 406 of present embodiment.
Greater than 0.5 times or lower height L5 during, become big at the upper height L4 of the wash dynamic control device 406 of present embodiment by the wash dynamic control device 406 caused additional resistances of present embodiment greater than 1.7 times.And at the upper height L4 of present embodiment less than 0.3 times or lower height L5 during less than 1.5 times, stern FLOW CONTROL effect will descend.
The wash dynamic control device 406 of present embodiment causes eddy current in the place ahead of above-mentioned cooling water outlet 202.Above-mentioned eddy current makes above-mentioned cooling water expansion tank break away from from the mobile route of the wash dynamic control device 406 above-mentioned cooling water expansion tank before of installation present embodiment.Just, the wash dynamic control device 406 of present embodiment makes the distribution of the wake that flows into screw propeller change symmetrically with respect to the hull center shaft, thereby makes cooling water expansion tank not arrive the wash field.
Figure 13 is when being illustrated in the wash dynamic control device of the embodiment that Figure 11 is installed, and watches the view of screw propeller surface current speed distribution from stern.It is apparent that the distribution that flows into the wake of screw propeller returns to respect to hull center shaft symmetry this moment.
Figure 14 is that expression corresponds respectively to when discharging cooling water expansion tank, when not discharging cooling water expansion tank and when the wash dynamic control device of embodiment shown in Figure 11 is installed, the view of the unit volume in cavity.As shown in figure 14, compare with the situation of the wash dynamic control device 406 that present embodiment is not installed, the unit volume in cavity is maximum to reduce 13%.
Industrial applicibility
According to the present invention, the distribution of the wake that flows into screw is returned to respect to hull central shaft pair Claim, to reduce the generation in cavity. Thereby, improve the vibration proof performance of boats and ships, and improve propulsive efficiency.
Claims (7)
1, a kind of wash dynamic control device, it is a kind of device that is used to control by the stern flow field that cooling water expansion tank confused of discharging from the cooling water outlet of boats and ships, it is characterized in that:
Described device is arranged in the scope from described cooling water outlet to 3 times of distances of this outlet diameter, described Unit Installation angle is for to become 16～30 ° with respect to the hull horizontal surface, the width of the hull height direction of described device is 0.2～0.6 times of outlet diameter, and the width of the ship length direction of described device is 0.5～1.3 times of outlet diameter.
2, wash dynamic control device according to claim 1 is characterized in that: described device is 0.2～0.6 times of described cooling water outlet diameter apart from the distance of ship hull plate.
3, a kind of wash dynamic control device, it is a kind of device that is used to control by the stern flow field that cooling water expansion tank confused of discharging from the cooling water outlet of boats and ships, it is characterized in that:
Described device for be positioned at along streamline by described cooling water outlet apart from described cooling water outlet the place ahead 1 stop spacing from the pyrometric cone shape of position, the bottom surface of described pyrometric cone is an equicrural triangle, the length on the base of described equicrural triangle is 0.2～0.3 times of described cooling water outlet diameter, the length of the altitude line of bottom surface is 1.5～1.7 times of described outlet diameter, from the length of the vertical line of summit to the bottom surface of pyrometric cone is 0.6～0.8 times of described outlet diameter, and the angle of described bottom surface altitude line and streamline is 10～15 °.
4, wash dynamic control device according to claim 3 is characterized in that: described device along the streamline by cooling water outlet be positioned at apart from described cooling water outlet the place ahead 0.8 stop spacing from the position.
5, a kind of wash dynamic control device, it is a kind of device that is used to control by the stern flow field that cooling water expansion tank confused of discharging from the cooling water outlet of boats and ships, it is characterized in that:
Described device is installed on the place ahead outer peripheral face of described cooling water outlet, has the scalene shape that upper height and lower height with respect to hull surface do not wait.
6, wash dynamic control device according to claim 5 is characterized in that: the upper height of described wash dynamic control device is 0.3～0.5 times of center-line-average of described wash dynamic control device.
7, wash dynamic control device according to claim 5 is characterized in that: the lower height of described wash dynamic control device is 1.5～1.7 times of center-line-average of described wash dynamic control device.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20-2005-0017619U KR200399867Y1 (en) | 2005-06-20 | 2005-06-20 | Flow control device of cooling water for ship |
| KR2020050017619 | 2005-06-20 | ||
| KR2020050018065 | 2005-06-22 | ||
| KR2020050018064 | 2005-06-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101005986A true CN101005986A (en) | 2007-07-25 |
| CN100486864C CN100486864C (en) | 2009-05-13 |
Family
ID=38704565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006800005704A Active CN100486864C (en) | 2005-06-20 | 2006-01-18 | Flow control device of discharge water for ship refrigeration |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR200399867Y1 (en) |
| CN (1) | CN100486864C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109606602A (en) * | 2018-10-31 | 2019-04-12 | 沪东中华造船(集团)有限公司 | A kind of stern flow field peculiar to vessel fairing and its localization method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100807410B1 (en) | 2007-01-10 | 2008-02-25 | 대우조선해양 주식회사 | Drain structure for cooling water considering frictional resistance and wake of vessel |
| KR101390826B1 (en) * | 2012-09-14 | 2014-05-08 | 삼성중공업 주식회사 | Resistance reducing apparatus of ship, and ship having the same |
-
2005
- 2005-06-20 KR KR20-2005-0017619U patent/KR200399867Y1/en not_active IP Right Cessation
-
2006
- 2006-01-18 CN CNB2006800005704A patent/CN100486864C/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109606602A (en) * | 2018-10-31 | 2019-04-12 | 沪东中华造船(集团)有限公司 | A kind of stern flow field peculiar to vessel fairing and its localization method |
Also Published As
| Publication number | Publication date |
|---|---|
| KR200399867Y1 (en) | 2005-10-31 |
| CN100486864C (en) | 2009-05-13 |
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