113results about How to "Reduce wave resistance" patented technology

The present invention discloses a front water diversion propulsion ship and aims at providing a regular water diversion type ship which can eliminate wave making completely or reduce the wave making and eliminate wave making resistance and can also reduce the friction resistance and motivate the hydrodynamic propulsion to improve the comprehensive performance of the ship such as speed, stability and efficiency. The front water diversion propulsion ship is realized by a technical proposal as follows: a forward water inlet is arranged under the water line at the front part of the ship; and a backward water outlet or a thruster inlet are arranged and matched at the forward water inlet with a flow passage which runs through the forward water inlet and a stern or arranged at two lateral parts. Or a forward-backward thruster is arranged under the water line, or a watercourse is matched and arranged in the front of the water line, two lateral water outlets which are propelled by two sides of the front of the ship or propelled by a stern impeller are arranged, or the back ship body of the thruster is arranged as a streamline after run to motivate the hydrodynamic propulsion. The technology of the front water diversion propulsion ship can fit for designing and manufacturing a powered regular drainage ship and improving the existing ship and is especially fit for designing, manufacturing and improving the economical, large and jumbo ships.

The invention provides a low resistance and low sonic boom layout supersonic aircraft, and relates to the technical field of supersonic aircraft design. According to the low resistance and low sonic boom layout supersonic aircraft, the canard configuration and the large slenderness ratio aircraft body are used, the aircraft head completely droops, the lower edge of the tip portion upturns, the front undercarriage is forward received into the front undercarriage cabin of the aircraft head, the front portion of the middle-front aircraft body is provided with a full-motion trapezoidal canard having a middle sweepback, the back portion of the middle-front aircraft body and the position in front of the wing are the gas inlet channel of the power system, the middle-rear aircraft body adopts the wasp waist design so as to connect the root portions of the upper wing and the lower wing of the aircraft wings, two jet engines are vertically arranged on the rear aircraft body in a side-by-side manner, the trapezoidal vertical tail having a large sweepback is arranged on the upper portion of the rear aircraft body, and the tip portions of the upper wing and the lower wing of the aircraft wings are connected through the end plate. According to the low resistance and low sonic boom layout supersonic aircraft of the present invention, the shock wave generated due to the wing attack angle is weakened, the sonic boom influence of the shock wave on the ground is reduced, the stability is strong, and safety and reliability are provided.

The invention provides a high-speed catamaran which comprises two sheet bodies arranged in parallel and a main cabin connected onto the tops of the sheet bodies. The high-speed catamaran further comprises two bulbnoses, an air suction device and a plurality of micro-bubble generating devices, wherein the two bulbnoses are connected to the bottom of the main cabin through struts and are vertically arranged on a bow and a stern of the catamaran, the air suction device is mounted on the top of the main cabin and is communicated with air pipes arranged inside the high-speed catamaran in a built-in mode, and the plurality of micro-bubble generating devices are arranged on the surfaces of the bulbnoses and the sheet bodies and is communicated with the air pipes. Hydrofoils are symmetrically arranged on both sides of each of the bulbnoses. The seakeeping performance of the catamaran is enhanced by arranging the bulbnoses with the hydrofoils on the bow and the stern to reduce wave-making resistance. The micro-bubble generating devices arranged at the bottom of the catamaran can generate thin bubble films at the bottom of the catamaran to reduce the frictional resistance of the catamaran. The air suction device arranged on the top of the cabin and air suction rotors can further improve the air suction efficiency of the air suction device, enhance the resistance reduction effect of the micro-bubble generating devices, and greatly reduce the energy consumption for generating micro bubbles.

The invention relates to a low-resistance hull under a designed waterline, belongs to the field of hull shape design, and mainly relates to the design of hulls under the designed waterline. A propeller is arranged on a ship bow, a shell bossing is designed to be in a spindly shape similar to a cone, the two sides of a transition position between the shell bossing and the hull above the shell bossing are respectively provided with an arc flow guide water groove, the bow waterline above the shell bossing is designed to be in a V shape with the big end up, and the V-shaped bow waterline has a flow guide effect. An area which has a small included angle between the surface normal of the bow and the navigation direction is designed to be close to one fourth to three fourths of ship width, two inclined flow guide water grooves are formed in the two sides of a main engine space located on the lower portion of the ship bow, a symmetric ship bow or an asymmetric ship bow is used, and the stern of the hull is designed to be a streamline reducing body. The bow and the stern are respectively provided with a flow channel which penetrates through the larboard and the starboard, and a spraying propelling unit is arranged in the hull to meet the steering requirement of the hull. Through linear bow and stern design and the propeller arranged on the bow, the head and wake flow fields of the hull are improved, adverse effects of water on ship navigation are weakened, and ship resistance is reduced.

The invention discloses a high-performance small-waterline-area twin-body intelligent measurement ship. A ship body of the ship comprises a submerging body and a case. A power unit and a direction control unit are arranged on the submerging body, a remote control unit and a measuring unit are arranged on the case, and a solar cell panel is arranged on the upper surface of the casing. The submerging body is formed by two parallel and symmetric torpedo submersible diving chambers. Each submersible diving chamber comprises three watertight battery compartments. Storage batteries are arranged in the three battery compartments and are connected through wires. The storage batteries are connected with the solar cell panel, the power unit, the remote control unit and the measuring unit through wires respectively. By means of the measurement ship, new energy is fully used during measurement ship navigation and stored, and accordingly, the endurance of the ship and the intelligent equipment normal operation are guaranteed, and the survey is efficient, energy saving and environmentally friendly.

The invention discloses a lifting multi-beam acoustic equipment guide cover for examination ship, which comprises a fixed flow guide cover, a lifting guide cover and a lifting mechanism. The fixing guide cover is fixed to the bottom of the ship body and the transducer of the multi-beam acoustic equipment is fixed on the fixed guide cover. The angle between the main body part of the fixed guide cover and the current flow direction is an obtuse angle; the angle between the two side plates and the bottom of the hull is an acute angle; the lifting guide cover is connected with the lifting mechanism; the angle between the lifting guide cover and the flow direction of the water flow is an acute angle; the angle between the two side plates and the bottom of the hull is an obtuse angle; the lifting mechanism drives the lifting guide cover to rise; the lifting guide cover is placed on the groove of the bottom of the ship; the bottom of the lifting guide cover is arranged to be flush with the bottom of the fixed guide cover. The invention can reduce the resistance of the multi-beam transducer guide cover and ensure the detection effect of the multi-beam acoustic equipment.

The invention discloses a mixed-flow device of a ship diversion propelling system, aiming at solving the problem of jet flow of the ship diversion propelling system. The mixed-flow device mainly consists of a jet pipe, a wake flow pipe and a mixed-flow pipe, wherein a nozzle of the jet pipe and an outlet of the wake flow pipe are communicated with the mixed-flow device; an inlet of the wake flow pipe is arranged at the lateral side of the jet pipe; the cross section of the jet pipe is less than that of the mixed-flow pipe; and jet flow and wake flow are acted and mixed together in a mixed-flow cavity. By comparing water flow at the outlet of the mixed-flow pipe with the water flow at the nozzle of the jet pipe, the invention reduces the speed and increases the flow so as to improve the stern flow field of the ship, reduce the wave making resistance of the stern, or improve the flow field of a propeller or a pump impeller, improve the propelling efficiency and reduce damage of vacuole and water attach. The induced velocity generated by the water flow at the outer side of the inlet of the wake flow pipe and the induced pressure converted thereby can be further used for improving the stern flow field of the ship and reducing the wave making resistance of the stern.

The invention discloses a single-body semiplaning wave-piercing ship and belongs to the field of small speed boats. The single-body semiplaning wave-piercing ship comprises an improved mixing type inward-tilting wave-piercing bow, a semiplaning underwater main ship body, an inward-tilting wave-pressing freeboard and a totally-enclosed upper building, wherein the improved mixing type inward-tilting wave-piercing bow comprises a bow column, a totally-enclosed bow deck and a tow freeboard, the tow freeboard comprises an inward-tilting part and an outward-tilting part, the inward-tilting part and the outward-tilting part are connected to form a freeboard knuckle line, and the included angle gamma between the projection, on the longitudinal section in center plane, of the freeboard knuckle line and the waterline ranges from 1 degree to 3 degrees. According to the single-body semiplaning wave-piercing ship, the wave-piercing capacity, the hiding capacity, the rapidness, the wave making capacity, the stability and the loading capacity of the ship body are improved; compared with the prior art, flooding and wetting of the freeboard are further controlled, lifting force is provided by the freeboard to lift the ship body, and resistance is reduced.

The invention discloses an unmanned automatic search ship for garbage on water. The unmanned automatic search ship is characterized by comprising two electric ships, each electric ship is provided with two direct-current motors, the two electric ships are connected and fixed through a carbon fiber plate, and a net bag is fixed in the gap between the two electric ships; a tablet personal computer and a camera are fixed to the carbon fiber plate, a lighting device is installed on the camera, the camera is connected with the tablet personal computer, and an image recognition program is installed on the tablet personal computer; the tablet personal computer is connected with a single-chip microcomputer, the single-chip microcomputer is connected with two direct-current motor drivers, and finally the two direct-current motor drivers control the four direct-current motors of the two electric ships respectively. Therefore, the unmanned automatic search ship is suitable for a closed lake or water surface which a large clearing ship cannot enter and needs manual fishing of a boat and a great number of urban small and medium river channels closed by gates, the problems that garbage on water is searched for manually at present, and therefore clearing efficiency is low are solved, and the unmanned automatic search ship is beneficial for improving efficiency and saving oil consumption.

The invention discloses a ship which can advance laterally and reduce the wave resistance. It includes ship body (1), the lateral position below the ship body (1) floating line is equipped with several tunnel (2) passing through the ship body (1), two ends of each tunnel (2) are equipped with propeller (3) respectively, the propeller (3) is connected with the drive device (K1) driving it work and the all-slewing equipment (K2) which can make the propeller (3) generate thrust towards any direction, it is also equipped with the lateral oscillating motion device(K3) which recalls and overhangs the propeller (3) into tunnel (2). The ship has simple structure, it can reduce the ship wave resistance effectively to pushing water navigation, as well as can make the propeller generate thrust towards any direction conveniently and recall or overhang the propeller into tunnel, it can effectively increase the cabin capacity of ship; it can realize turning conveniently and enhance the stability of ship course greatly.

The invention discloses a control method for an unmanned ship. The control method is applied to a control system for an unmanned ship. The system comprises a shore-based monitoring subsystem, a lowercomputer control subsystem, a propeller control subsystem, a steering engine control module, a propeller control module, an image acquisition module, a laser ranging module, a communication module anda temperature and humidity module; the unmanned ship comprises a ship body, a connecting structure, closed waterproof boxes and propeller sets; the ship body comprises a first ship body structure anda second ship body structure; the connecting structure is connected with the first ship body structure and the second ship body structure; the closed waterproof boxes are symmetrically arranged between the first ship body structure and the second ship body structure; the propeller sets comprise a first propeller set and a second propeller set; the first propeller set is located on the connectingstructure at one end of the ship body; the second propeller set is located on the connecting structure at the other end of the ship body; the propeller sets are symmetrically distributed along a center line; and the center line is a center line corresponding to the first ship body structure and the second ship body structure. The control method is suitable for the control and structural improvement of large unmanned ships.

The invention discloses a green energy small waterplane catamaran unmanned boat for marine environmental monitoring. Optimization design is performed on a line style aspect of the unmanned boat, a V-shaped small body is disposed on the head part of a box-type connection bridge, and an intelligent pod is disposed on the tail part to increase the maneuverability of the unmanned boat and reduce a head tilt phenomenon; and in order to meet requirements of meteorological monitoring, the unmanned boat is provided with an environmental sensing system at one third position of the boat bow, an environmental monitoring system, and an intelligent navigation system installed at the stern, wherein the intelligent navigation system includes two main propulsion devices arranged at rear portions of two floating bodies, a pod device arranged on the lower rear part of the connection bridge, and a solar sail device on the rear upper surface, a design of combination of a sail and solar energy can effectively increase the utilization rate of photovoltaic panels and provides more space for embarkation of meteorological monitoring equipment.

The invention belongs to the field of the ocean buoyance, and specifically relates to a self-guarding control method of a power-driven buoyance under random ocean wave interference. The method comprises the following steps: estimating an ocean wave direction when the power-driven buoyance is in self-guarding sailing; and planning the energy optimal seaway in consideration of a wave resistance increasing problem. The ocean wave direction estimation comprises online predicting a wave direction angle of the power-driven buoyance in the self-guarding region in real time, and then obtaining an encounter angle with the ocean wave in the self-guarding sailing of the power-driven buoyance; setting virtual nodes in a self-guarding region of the power-driven buoyance, and performing the energy optimal seaway planning on the power-driven buoyance by adopting an A* algorithm; taking the energy loss of the power-driven buoyance sailing on the planned seaway as a target function according to a function relation between the wave resistance increasing suffered by the power-driven buoyance and the encounter angle so that the energy loss of the power-driven buoyance sailing on the planned seaway islowest. The energy loss of the power-driven buoyance in self-guarding sailing under the wave resistance increasing interference can be effectively reduced, the sailing efficiency of the power-driven buoyance is improved, and the application prospect is extensive.

The invention relates to a ball bow middle- and high-speed ship, especially relates to a ball bow middle- and high-speed ship satisfying a dragging navigation condition of an icebreaker, and belongs to the technical field of a ball bow middle- and high-speed ship. The ball bow middle- and high-speed ship satisfying the dragging navigation condition of the icebreaker is characterized in that the X axis is in the length direction of a ship body, the Y axis is in the width direction, and the Z axis is in the vertical direction; the distance from the front end of a structural waterline to a ball bow end point is 2.5m, and the minimum distance between a ball bow while scantling draft and the tail part of an icebreaking dragging ship is 2m to 3.5m; 45%-65% of the length of the ball bow is disposed behind a bow vertical line, and the ball bow is guaranteed to have the sufficient effective length; transition between the upper part of the ball bow and the ship body is performed through a knuckle line, and an inclined angle between projection of the knuckle line in the X-axis direction and a line type of a cross section perpendicular to the X axis is 90 degrees to 150 degrees, so a transition line type is thin enough; and the front end point of a water line above the ball bow is in the shape of a sharp cutter point, the fact that a water surface is cut open is facilitated, and a wave breaking resisting force is reduced.

The invention discloses a novel icebreaker bow structure and an ice breaking method. The bow structure comprises a bow upper part, a bow middle part and a bow lower part, the bow upper part is a straight bow body and is perpendicular to a horizontal plane, and the inclination angle is 90 degrees; the bow middle part adopts an ice-breaking blade inclining downwards, and the inclination angle of theice-breaking blade is 15-40 degrees; the bow lower part adopts a bulbous bow, the lower edge line of the bulbous bow is provided with an ice-breaking blade, and the inclination angle of the ice-breaking blade is 35-50 degrees; the upper edge line of the bulbous bow is provided with an ice-breaking blade with the inclination angle of 15-30 degrees. The bow structure can have good ice breaking performance under ice conditions at different degrees in polar regions and have good resistance performance in open water areas at the same time.

The invention discloses a green energy, small waterplane and improved catamaran unmanned boat for marine environmental monitoring. The unmanned boat includes a superstructure, a small waterplane improved double-sheet body main boat body, a boat body monitoring and motion intelligent control system, a navigation planning and decision-making system, and an environmental monitoring system. The unmanned boat adopts a small waterplane catamaran as a carrier, optimal calculation is performed in boat type parameters of the small waterplane catamaran by comprehensive optimization software, a scheme with best navigation performance for a main function of marine meteorological monitoring is obtained, wave-making and interference resistance between sheet bodies are effectively reduced, through combination of the advantages of small wave-making resistance, large deck area, good wave resistance, small navigation resistance and good stability of the small waterplane catamaran itself, a stable working environment can be provided for various monitoring equipment, and its better navigation performance can meet working requirements of the unmanned boat in offshore and distant sea water areas.

The invention discloses a high-speed ship additionally provided with stern wave suppression plates and a control method of the high-speed ship. The high-speed ship additionally provided with the sternwave suppression plate is characterized in that a fixed duck tongue type hydrofoil is arranged on ship bow and the active controllable stern wave suppression plates are arranged at stern; the duck tongue type hydrofoil is fixedly connected with the lower part of the ship bow; the stern wave suppression plates are symmetrically arranged on two sides of a hull center line, wherein the two plates are the same and are both rectangular solid plates; the two ends of the stern wave suppression plates are hinged with support frames; and the support frames are fixedly mounted on a stern transom plate,and play the function of stabilizing the stern wave suppression plates. The angles of the stern wave suppression plates are adjusted to rotate within the range of 0 degree to 10 degrees; the duck tongue type hydrofoil and the stern wave suppression plates can increase vertical motion damping and obtain torque for suppressing pitch; the stern wave suppression plates can also improve a tail flow field and reduce ship resistance; and the seaworthiness, seakeeping and rapidity of the ship can be improved by combining the duck tongue type hydrofoil with the stern wave suppression plates.

The invention discloses an unattended ship stabilizing device, and belongs to the technical field of ship stabilizing. The unattended ship stabilizing device comprises a ship body. A flow breaking body is arranged at a stem position of the ship body and is in a conical shape. The rear end of the flow breaking body is connected with a connecting rod. The connecting rod is connected with the ship body through a damper. One end of the flow breaking body is connected with a rope body. The rope body is connected with a winding and unwinding mechanism on the ship body. The unattended ship stabilizing device has wave breaking, stabilizing and power generating functions and enhances the storing and balancing capacity and monitoring data precision of an unattended ship.

The invention discloses a variable wing leading edge combining subsonic aerodynamic performance and supersonic aerodynamic performance, and belongs to the technical field of aerodynamic design of aircrafts. The variable wing leading edge is formed by mounting two movable leading edge baffles on the upper and lower sides of the wing leading edge through connecting rods respectively, and the two movable leading edge baffles make contact to form a sharp wing leading edge during supersonic flight; during subsonic flight, the two movable leading edge baffles translate forwards and rotate respectively to expose the wing leading edge, and an open slot structure is formed between each movable leading edge baffle and the wing leading edge. By means of the variable wing leading edge, the shape of the wing leading edge can be changed reasonably by the two movable leading edge baffles according to different environments in a flight process of an aircraft, the aircraft can obtain higher lift-drag ratio in supersonic and subsonic flight states, and use cost can be reduced.