Bow structure of a vessel

Abstract

The present disclosure refers to a bow (102) of a vessel (100) having a convex profile (104) flanked between a concave profile (106) on either side, the convex profile (104), and the concave profile (106) extends vertically along the corresponding profile of the bow (102).

Description

BOW STRUCTURE OF A VESSELTECHNICAL FIELD

[0001] The present invention generally relates to a structure of vessels such as ships. More specifically, the present invention relates to the structure of a bow having a convex and concave profile.BACKGROUND

[0002] Background description includes information that may be useful in understanding the present disclosure. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed disclosure, or that any publication specifically or implicitly referenced is prior art.

[0003] In maritime engineering, the design of a vessel's bow is critical for optimizing its hydrodynamic performance, stability, and efficiency, especially in challenging environments such as polar regions or rough seas. Traditional bow designs often face significant resistance when navigating through turbulent waters or breaking through ice, leading to reduced speed, increased fuel consumption, and a higher risk of structural damage. As a result, there has been growing interest in refining bow shapes to minimize hydrodynamic drag, enhance icebreaking capabilities, and improve overall operational efficiency.

[0004] Many conventional approaches to reducing drag resistance in vessels involve the use of specific bow structures. One such design is the bulbous bow, commonly employed on large vessels to alter wave patterns and reduce drag. By modifying the pressure distribution ahead of the bow, the bulbous bow creates destructive interference with the bow wave, which can effectively reduce drag within a specific range of speeds. However, the effectiveness of this design is limited to particular vessel shapes and speed ranges. The bulbous bow optimized for one vessel or speed may be counterproductive for another, making precise design and operational knowledge essential for achieving the desired performance.

[0005] The bulbous bow, while effective in reducing drag under full-laden conditions, exhibits increased drag resistance at reduced drafts, particularly at the ballast load line. This limitation results in suboptimal fuel efficiency and increased operational costs.

[0006] The present invention addresses the aforementioned limitations by incorporating a beak-shaped bow that adjusts to varying draft levels, thus optimizing drag reduction across all draft lines. By shaping the bow to facilitate natural airflow, this design allows a central water flow between the width of the beak bow to generate pressurized air bubbles, which create an ‘air carpet’ effect under the hull. This pressure difference aids in lowering hydrodynamic resistance

[0007] Despite their benefits, conventional bow designs like the bulbous bow are not well-suited for environments where turbulent water flow or ice interactions demand specialized structural adaptations. Traditional straight bow profiles, in particular, tend to experience significant resistance upon direct impact with ice, resulting in increased wear on the hull and a shorter operational lifespan for the vessel.

[0008] Therefore, there is a need for a simple, cost-effective solution that addresses above-mentioned shortcomings by improving the design of the bow of the vessel. The structure of the bow enhances the ability of the vessel to navigate efficiently through open waters by directing water flow more effectively and reducing the impact forces exerted by ice or turbulent water.OBJECTS OF THE INVENTION

[0009] An object of the present disclosure is to provide a bow structure that improves hydrodynamic efficiency and reduces resistance during operation

[0010] Another object of the present disclosure is to provide a bow structure that facilitates the movement of seawater toward the bottom of the hull while suppressing resistance caused by the vessel's interaction with the water.

[0011] Another object of the present disclosure is to provide a bow structure that enhances the performance of the vessel in various marine environments.

[0012] Another object of the present disclosure is to provide a bow structure that improves maneuverability and reduces the hydrodynamic drag.SUMMARY

[0013] An aspect of the present invention relates to the field of bow structure of a vessel such as ships. More specifically, the present invention relates to the structure of a bow having a convex and concave profile.

[0014] In an aspect, the bow of a vessel has a convex profile flanked between a concave profile on either side. The convex profile and the concave profile extend vertically along the corresponding profile of the bow. In addition, the vertical profile of the bow is defined as a beak-shaped structure.

[0015] In an aspect, the convex profile and the concave profile may be oriented horizontally relative to a center line of the bow.

[0016] In an aspect, the convex profile and the concave profile of the bow may facilitate the movement of flowing seawater to a bottom of the hull. Further, the concave profile of the bow may suppress resistance by the contact between the vessel and the seawater when the vessel operates.

[0017] Various objects, features, aspects, and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0019] FIG. 1 illustrates an exemplary front view of the bow structure of a vessel, in accordance with an embodiment of the present invention.

[0020] FIG. 2 illustrates an exemplary side view of the bow structure of a vessel, in accordance with an embodiment of the present invention.

[0021] FIG. 3 illustrates an exemplary side view of the bow structure of a vessel, in accordance with a second embodiment of the present invention.DETAILED DESCRIPTION

[0022] Reference numeral100 - vessel102 - bow104 - convex profile106 - concave profile108 - centre line

[0023] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.

[0024] Embodiment of the present invention relates to the field of bow structure of a vessel such as ships. More specifically, the present invention relates to the structure of a bow having a convex and concave profile.

[0025] Referring to FIG. 1 and FIG. 2, an exemplary schematic diagram of a bow 102 structure of vessel 100 is disclosed. The bow 102 structure is characterized by a combination of profiles, featuring a convex profile 104 centrally positioned and flanked between a concave profile 106 on either side of the bow 102. The arrangement is configured to enhance the hydrodynamic performance of the vessel 100. The convex profile 104 and the concaveprofile 106 extend vertically along the corresponding sections of the bow 102, creating a distinct beak shape that is pivotal to the functionality of the bow 102. The beak-shaped configuration of the bow 102 is configured to cut through water more efficiently, reducing drag and improving the overall hydrodynamic efficiency. The beak-shape projection of the bow 102 aids in directing the flow of water along the intended path, enhancing the speed and stability of the vessel 100. Further, the vertical extension of the convex 104 and concave profiles 106 to maintain the structural integrity of the bow 102 while accommodating the varying pressures exerted by water at different depths. The integration of the convex 104 and concave profiles 106 ensures that the bow 102 can withstand the dynamic forces encountered during structural fatigue and damage.

[0026] In one embodiment, the convex profile 104 and the concave profile 106 are oriented horizontally relative to the center line 108 of the bow 102. This orientation ensures that the profiles are symmetrically aligned concerning the vessel's central line 108, promoting balanced flow dynamics on both sides of the bow 102 as the vessel 100 moves through the water.

[0027] In an embodiment, the convex profile 104 located at the central portion of the bow 102, serves as the primary contact point with oncoming water, effectively reducing resistance and improving overall speed and fuel efficiency. The gradual curvature of the convex section allows for a smoother flow of water, minimizing turbulence and optimizing the distribution of hydrodynamic forces along the bow 102. Further, the concave profile 106 is positioned on either side of the convex profile 104 to stabilize the vessel 100 during navigation. The concave sections work in tandem with the central convex profile 104, redirecting water flow and providing additional lift. The configuration of the concave profile 106 reduces the likelihood of water ingress over the bow 102, particularly in rough seas, thereby enhancing the operational safety of the vessel 100.

[0028] In an embodiment, the convex profile 104 of the bow 102 may be configured to facilitate the movement of seawater toward the bottom of the bow 102, as the vessel 100 advances, the convex profile 104 ensures that the water is smoothly directed downward, minimizing turbulence and reducing the resistance encountered by the bow 102. The downward flow of water enhances the stability of the vessel 100 and allows for more efficientpropulsion. The concave profile 106 of the bow 102 may be configured to suppress resistance caused by the contact between the vessel 100 and seawater during operation. The concave shape reduces the surface area of the bow 102 in contact with the water, thereby diminishing frictional drag and improving the maneuverability of the vessel 100.

[0029] In another embodiment, the convex 104 and concave profiles 106 are positioned at a lower portion of the bow 102 to optimize the interaction between the bow 102 and the water, particularly in the submerged regions of the vessel 100. The profiles of the bow 102 at the lower portion reduce resistance significantly.

[0030] The concave portion near the upper bow assists in resistance reduction by absorbing waves and directing them towards the bottom of the vessel. This assists in creating an air-cushion effect that minimizes drag even in laden conditions.

[0031] In another embodiment, the vessel 100 may include the bow 102 structure described in the preceding embodiments. The bow 102 can be integrated into the vessel 100 to reduce the hydrodynamic drag. Whether used in commercial shipping, naval operations, or specialized maritime applications, the vessel 100 with the bow 102 design is poised to achieve superior performance in a variety of operational conditions.

[0032] In an alternate embodiment as illustrated in FIG. 3, the bow 102 structure of the vessel 100 can be elongated based on operational requirements, providing increased hydrodynamic efficiency and improved stability, particularly in varying load conditions. In this configuration, the length of the bow 102 is extended forward, creating a more prominent and streamlined beak-shaped projection. The elongation of the bow 102 not only reduces drag by providing a smoother entry into the water but also enhances the vessel's ability to cut through waves, resulting in greater stability and speed.

[0033] The elongated bow 102 is configured such that the pointed end 110 of the bow 102 is designed to remain consistently above the waterline, regardless of whether the vessel 100 is in a laden condition (fully loaded) or in an unladen (lightweight) state. This ensures that the bow 102 maintains optimal hydrodynamic performance across various operational conditions. In a laden condition, the vessel 100 naturally sits deeper in the water; however,the elongated bow 102 is positioned and angled in such a way that the pointed end 110 remains above the water, preventing excessive water contact and minimizing wave slamming on the bow. In an unladen condition, the vessel 100 sits higher in the water, but the bow's shape and length continue to ensure that the pointed end 110 stays above the water, reducing air resistance and maintaining the vessel’s hydrodynamic balance.

[0034] The convex profile aligns near the full-laden draft, optimizing resistance reduction at deeper drafts, while the concave profile, positioned near the ballast draft, facilitates wave absorption and air bubble generation to enhance the vessel's hydrodynamic efficiency.

[0035] In addition to the extension, the profiles of the bow 102 — featuring the central convex profile 104 and the flanking concave profiles 106 — are optimized to accommodate the longer structure. The curvature of the convex profile 104 is adjusted to enhance water flow around the elongated bow 102, ensuring minimal turbulence and efficient water displacement. Meanwhile, the concave profiles 106 further assist in stabilizing the vessel 100 during navigation by redirecting water flow away from the vessel’s hull, reducing resistance, and improving fuel efficiency.

[0036] The elongated bow 102, with its raised pointed end 110, provides significant operational advantages, particularly in rough sea conditions. By keeping the bow's pointed end above the waterline, the vessel 100 experiences reduced water ingress over the bow 102, thus enhancing safety and maneuverability in harsh maritime environments. This design allows for better handling and performance, whether the vessel 100 is engaged in commercial, naval, or specialized maritime activities.

[0037] The present invention provides a significant improvement over traditional bow designs by offering a specialized configuration that enhances the vessel's 100 ability to navigate challenging marine environments. The integration of convex 104 and concave profile 106 in the bow 102 not only improves the hydrodynamic performance of the vessel 100 but also extends its operational lifespan by reducing the impact forces and resistance encountered during navigation. The bow 102 can apply to a wide range of vessels 100.

[0038] While the foregoing describes various embodiments of the disclosure, other and further embodiments of the disclosure may be devised without departing from the basic scope thereof. The scope of the disclosure is determined by the claims that follow. The disclosure is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the disclosure when combined with information and knowledge available to the person having ordinary skill in the art.

Claims

CLAIMS1. A bow (102) of a vessel (100) having; a convex profile (104) flanked between a concave profile (106) on either side, the convex profile (104) and the concave profile (106) extending vertically along the corresponding profile of the bow (102).

2. The bow (102) as claimed in claim 1, wherein the convex profile (104) and the concave profile (106) are oriented horizontally relative to a center line (108) of the bow (102).

3. The bow (102) as claimed in claim 1, wherein the vertical profile of the bow (102) is defined as a beak-shaped structure.

4. The bow (102) as claimed in claim 1, wherein the convex profile (104) is positioned at a height of ±5% of laden draft line of the vessel,5. The bow (102) as claimed in claim 1, wherein the concave profile (106) is positioned above a ballast draft line of the vessel.

6. The bow (102) as claimed in claim 1, wherein the concave profile (106) of the bow (102) suppresses resistance by the contact between the vessel (100) and the seawater when the vessel (100) operates.

7. The bow (102) as claimed in claim 1, wherein the concave profile (106) has a trapezoidal shape with a slope angle ranging between 30 and 60 degrees.

8. The bow (102) as claimed in claim 1, wherein the width of the convex (104) and concave profiles (106) ranges from 5% to 30% of breadth of the vessel.

9. The bow (102) as claimed in claim 1, wherein the convex (104) and concave profiles (106) are positioned at a lower portion of the bow (102).

10. A vessel (100) comprising the bow (102) as claimed in claim 1-7.

1. The vessel as claimed in claim 7, wherein the bow structure is arranged such that the pointed end of the bow remains consistently above the waterline in both laden and unladen conditions.

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