1714results about "Watercraft hull design" patented technology

The invention provides an energy-saving navigation method and system for a combined fleet under intelligent control, and relates to the technical field of data processing, and the method comprises the steps: collecting environment data and ship state data of fleet navigation in real time, carrying out the preprocessing, removing redundant data, obtaining a navigation data set, and obtaining a navigation data set according to the navigation data set; calculating a channel influence value, a sea condition influence value and a wake flow influence value, determining a resistance influence value of each ship according to the values, calculating the required power of each ship, obtaining a required power data set, calculating the compensation power of each ship, analyzing the limitation of the channel on the compensation power of the ships, balancing the distribution of the compensation power among the ships, and obtaining an energy-saving scheme. And the compensation power of each ship is adjusted in real time, the navigation efficiency of the fleet is monitored, execution data are obtained, whether the navigation efficiency reaches preset efficiency or not is analyzed, the resistance influence value of each ship is updated, and a power distribution scheme is adjusted. The propulsive power of the fleet can be intelligently controlled, and energy consumption is saved.

The invention relates to the technical field of ship construction, in particular to a container ship wind shield and a ship. The container ship wind shield is of a curved-plate-shaped structure surrounding a bow of a ship body, a container on the ship body is arranged behind the container ship wind shield, the container ship wind shield comprises a wind guiding part, the width of the wind guiding part is gradually increased from the front to the rear of the ship body, and the width of the wind guiding part is larger than that of the ship body. The air guide part gradually inclines towards the direction close to the ship body from bottom to top; the height size of the air guide part is firstly increased and then reduced from the middle to the two sides, so that the top of the air guide part forms a biconvex structure in the vertical direction; or the top of the air guide part is bent towards the direction away from the container and then bent towards the direction close to the container from the middle to the two sides, so that the top of the air guide part is a plane with an M-shaped structure. According to the wind shield, airflow is smoother and is attached to the container, the disturbance range is small, the purpose of reducing wind resistance is achieved, and energy consumption in the ship running process is effectively reduced.

The invention discloses a welding device and method for a corrugated plate of a MARKIII type enclosure system, and the welding device comprises a corrugated section clamp which is of an inverted U-shaped structure and comprises a horizontal plate and two vertical side plates, and the vertical side plates of the corrugated section clamp are provided with clamping grooves corresponding to corrugated sections in shape. And the connecting rod is connected with the corrugated section clamp horizontal plate and extends out of the corrugated section clamp horizontal plate. The cushion block is arranged at the tail end of the connecting rod. The rail is connected to the tail end of the cushion block and is perpendicular to the connecting rod. The welding device can move by 360 degrees in the horizontal direction and is matched with an automatic corrugated plate welding machine, a specific welding sequence is applied, and the purposes that all corrugated plates in all positions of a real ship can be welded through the automatic welding machine, and the production efficiency is improved are achieved.

The invention relates to the technical field of ships, in particular to a stern-direction icebreaking structure and a ship, the stern-direction icebreaking structure comprises two ice pressing appendages, the two ice pressing appendages are oppositely arranged in a spaced mode, the ice pressing appendages are fixedly arranged at the lower end of the stern, and inclined ice pressing structures are formed on the sides, away from the bow, of the ice pressing appendages; the inclined ice pressing structure is inclined downwards in the direction from the stern to the bow; the two rudder blades and the two ice pressing appendages are arranged in a one-to-one correspondence mode, and the rudder blades are rotationally arranged on the lower end faces of the ice pressing appendages. According to the invention, the stern sailing icebreaking capability of the ship can be obviously improved, and the power can be reduced.

The invention relates to the technical field of ship roll-on and roll-off equipment, and discloses a large automobile roll-on and roll-off transport ship movable ramp and a mounting method.The large automobile roll-on and roll-off transport ship movable ramp comprises a first hinge mount, a first ramp joint is rotatably arranged on the first hinge mount, and a second ramp joint is arranged at the end, away from the first hinge mount, of the first ramp joint; the end, away from the first ramp joint, of the second ramp joint is connected with a third ramp joint, a second hinge seat is arranged on the surface of the upper end of the hull structure and located on the inner side of the first hinge seat, a hinge shaft is arranged on the second hinge seat, and the second hinge seat is rotationally connected with the end of the third ramp joint through the hinge shaft. According to the movable ramp of the large automobile roll-on-roll-off transport ship, by arranging the supporting assembly and pulling out the positioning plug pin, when the third ramp section is lifted, the sliding block can slide along the rail base, then the positioning pin is clamped into the positioning hole, it is guaranteed that the position of the sliding block is fixed, then the supporting rod can effectively support the third ramp section, and the requirement for safe passing of automobiles is met.

The invention discloses a manta ray-imitated underwater vehicle with pectoral fins capable of actively and passively deforming, and belongs to the technical field of bionic robots. Comprising a manta ray-imitated skeleton, a plurality of driving joints mounted on the manta ray-imitated skeleton and a skin covering the outer surface of the manta ray-imitated skeleton, and the driving joints are angle servo drivers; the manta ray imitating skeleton comprises a trunk skeleton and pectoral fin skeletons, and the two pectoral fin skeletons are symmetrically arranged on the two sides of the trunk skeleton and are coupled with the driving joints to form linkage pectoral fins; series-parallel control is carried out on the multiple driving joints through the control module, and deformation movement of the pectoral fin in the spanwise direction and deformation movement of the pectoral fin in the chordwise direction are achieved. And the manta ray imitating skeleton and the driving joint are packaged through the skin to form a bionic appearance. According to the bionic multi-joint pectoral fin, large deformation movement in the spanwise direction and fluctuation transmission in the chordwise direction of the bionic multi-joint pectoral fin are achieved, and the bionic pectoral fin shows complex flexible movement similar to that of a real manta ray pectoral fin in the movement process.

The invention relates to an underwater vehicle technology, in particular to an unmanned underwater vehicle. The whole unmanned underwater vehicle is designed to be in a bionic fish shape and comprises a head mechanism, a skeleton structure, a tail mechanism, an equipment box, a marching system and a shell, the head mechanism, the shell and the tail mechanism are sequentially connected, the skeleton structure is arranged in the shell and comprises a plurality of spine bodies and rib assemblies, and the rib assemblies are arranged in the shell. Silica gel is arranged between the spine bodies; the rib assembly and the spine body are in one-to-one correspondence and are connected, the rib structure comprises a bearing and two rib frames connected to the bearing, the two rib frames are connected to the bearing to generate relative rotation, the rib frames are used for supporting and arranging an equipment box, and the equipment box is used for arranging instruments and equipment; the problems that in the prior art, when an underwater vehicle advances underwater, generated resistance is large, advancing is not flexible enough, the space utilization rate is low, the impact resistance and deformation resistance are poor, and tearing and damage are prone to occurring are solved.

The invention relates to a preparation method of a'microstructure-liquid-like surface 'underwater drag-reduction, noise-reduction and antifouling multifunctional composite coating, and belongs to the field of underwater equipment. The multifunctional composite coating provided by the invention comprises an anti-drag microstructure arranged on the surface of a substrate and a liquid-like surface arranged on the surface of the anti-drag microstructure, and the liquid-like surface retains the original morphology of the anti-drag microstructure. According to the micro-structure, the distance between the wall face and a turbulent vortex can be increased, the frequency and strength of a flow vortex pair can be restrained, and resistance reduction is achieved; and on the liquid-like surface, resistance reduction can be achieved by enabling fluid to generate wall face slippage and reducing the speed gradient of the fluid on the boundary. The two mechanisms of action are different but do not interfere with each other, and a better drag reduction effect can be achieved through the synergistic effect. Meanwhile, the composite coating can achieve the noise reduction effect by reducing the turbulence intensity of the wall face. In addition, the liquid-like surface can resist adhesion of marine organisms, the integrity of the microstructure is guaranteed, and therefore the long-term drag reduction effect is achieved.

The ship bottom structure comprises a ship body, a ship body auxiliary stabilizing mechanism is arranged at the bottom of the ship body and used for assisting the ship body to be stabilized when the ship body moves, the tail of the ship body is provided with a spray pump installation containing cavity for installing a spray pump assembly, and the spray pump installation containing cavity is located on the center line of the tail of the ship body; the ship body auxiliary stabilizing mechanism comprises stabilizing edge strips and stabilizing spokes, the stabilizing edge strips are arranged at the position of a lower cornice of the edge of the ship body and surround the ship body by one circle, and the stabilizing spokes are arranged on the bottom face of the ship body in the length direction of the ship body. The ship body auxiliary stabilizing mechanism is suitable for recreational facilities, and the ship body auxiliary stabilizing mechanism is installed at the bottom of the ship body, so that in the using process of the ship body, the ship body auxiliary stabilizing mechanism can form a flow guide structure at the bottom of the ship body, the stability of the ship body is higher, and the ship body is particularly suitable for fresh water or seawater environments with the water depth not smaller than 1 m. The stability of the ship body is more applicable.

Disclosed is a method of reducing drag on the hull of the vessel by creating a Coanda flow on the hull by jetting a fluid onto the hull or surface continuous with hull at a location above the waterline in the vessel. The Coanda flow extends below the waterline, entraining air below the waterline and adjacent to the hull. The Coanda flows generated by the free jets impacting targets embedded in wear plates can be created in any direction relative to the vessel forward direction. An air cavity is also created by the jetted fluid. A system for reducing drag is also disclosed, wherein the system includes a pump in fluid communication with a source of fluid, power source connected to the pump and at least one nozzle positioned above the waterline of the vessel and oriented towards the hull of the vessel so as to jet the fluid thereon.

The invention relates to the technical field of metal material surface treatment, in particular to an antifouling and anti-drag coating for titanium alloy pipeline binding force and a preparation method and application of the antifouling and anti-drag coating. The preparation method comprises the following steps: carrying out micro-arc oxidation treatment on a titanium alloy to form a ceramic film on the surface of the titanium alloy; the titanium alloy subjected to micro-arc oxidation treatment is subjected to a hydrothermal reaction, and a nanoscale porous thorn microstructure and hydroxyl are introduced to the surface of a ceramic membrane; coating the pre-polymerization liquid on the titanium alloy subjected to hydrothermal treatment, and performing irradiation reaction under ultraviolet light to obtain first network gel; the first network gel is soaked in a beta-sodium glycerophosphate solution, and the ion-covalent double network p (SBMA-co-AAc) / CS-beta-GP DN hydrogel is formed. The stability and durability of the coating prepared by the preparation method provided by the invention are improved, and the coating has long-term stable anti-fouling performance, is strongly combined with a titanium alloy substrate, and has excellent anti-fouling effect and anti-drag effect when being applied to the titanium alloy substrate.

This invention introduces a unique two-piece nozzle used to provide air to the hull bottom of a ship, reducing the drag of water friction while in motion. The unique base assembly will mount flush in the bottom portion of a hull of a ship, creating no additional drag when closed. The unique interchangeable and modular nozzle design will allow for maintenance and or development of various designs in the water, without requiring a drydock visit. A flap portion of the nozzle insert will open when air is supplied, releasing small air bubbles to a ship's hull. The flap portion of the nozzle insert may incorporate various materials and passive closing schemes to adjust the air plastron. The present invention creates and maintains an air curtain, called plastron, delivering air underneath a ship hull through an array of nozzles.

The invention discloses a self-cleaning active resistance reducing agent and a preparation method thereof, and belongs to the technical field of oilfield chemistry. The resistance reducing agent is prepared from the following components in mass concentration: 30-50% of a composite copolymer, 1-15% of a desorption promoting agent, 0.02-0.4% of a suspension main agent, 0.15-0.6% of a suspension activating agent and the balance of a solvent, the preparation method comprises the following steps: firstly, dissolving polyvinyl alcohol and carboxymethyl hydroxypropyl guanidine gum in water to form an aqueous solution, and adding acrylamide, sodium acrylate, a rigid monomer containing a benzene ring, a reinforcing agent and urea into the aqueous solution to obtain a composite reaction solution; adding an initiator to carry out polymerization reaction to obtain polymer colloid; and cutting, crushing and drying the polymer colloid to obtain composite copolymer powder. The resistance reducing agent disclosed by the invention has a thickening effect, strengthens the characteristics of low adsorption and low residue of a polymer on the basis of having variable viscosity and strong sand-carrying capacity, also has the effects of promoting the dissociation of adsorbed gas into free gas and dredging and cleaning a stratum, and effectively improves the oil and gas recovery ratio and the stable production capacity.

The invention discloses a hydrofoil ship and a hydrofoil ship control method.The hydrofoil ship comprises a ship body, a hydrofoil mechanism and a propelling mechanism, the propelling mechanism is used for providing power for the ship body, the hydrofoil mechanism further comprises a supporting column, a telescopic driving part arranged above the supporting column, a main wing and a flap, and the main wing and the flap are arranged below the supporting column; the main wing is fixedly connected with the supporting column and symmetrically extends out of the two sides of the supporting column, the telescopic driving part is in transmission connection with the flap, one side of the flap is hinged to the main wing, and the telescopic driving part can drive the flap to swing around the main wing so as to change the posture and / or position of the ship body. The hydrofoil ship control method is used for controlling the hydrofoil ship. By means of the method, the ship posture can be rapidly adjusted, and the ship body can be rapidly balanced.

The invention discloses a pneumatic control type marine stern shaft sealing device which comprises a stern shaft body, a stern shaft sleeve body, a sealing ring sleeve, an annular sealing piece and a pneumatic control type assembly. When the sealing effect of the periphery of the inner side of the inner ring sleeve and the periphery of the stern shaft sleeve body is reduced, the ventilation ring can be driven by the power unit to move to the periphery of the outer ring sleeve, then airflow is input into the ventilation pipe, the airflow passes through the ventilation ring, and the ventilation ring inputs the airflow into the annular ventilation cavity through the ventilation holes of the outer ring sleeve; through the abutting force of airflow, the outer side of the periphery of the inner side ring sleeve is evenly controlled by air pressure in an abutting mode, so that the periphery of the inner side of the inner side ring sleeve is tightly attached to the outer side of the periphery of the stern shaft sleeve body in an abutting mode, the sealing effect can be improved, and extrusion deformation caused by rigid connection to the inner side ring sleeve is avoided through the airflow abutting mode; meanwhile, the ventilation ring is driven by the power unit to move, the position of input airflow can be flexibly controlled, and use is more flexible.

An electrically driven control method for a fin stabilizer. The control method comprises the following steps: performing signal isolation processing on a ship attitude signal detected by a sensor, then inputting the ship attitude signal into a PLC, subjecting the ship attitude signal to filtering processing followed by a fractional-order PID operation, then passing the ship attitude signal through a speed adjustment program and a wave-level adjustment program, finally sending a generated anti-rolling fin rotation angle signal to an electric motor drive to control a fin stabilizer to rotate, detecting position information of the rotated fin stabilizer by means of the sensor, generating a mechanical fin rotation angle signal, and feeding the mechanical fin rotation angle signal back to the PLC, so as to further control the fin stabilizer to rotate. The control method further comprises: processing a rolling signal generated inside the PLC, passing the rolling signal through the speed adjustment program, then generating a rolling fin rotation angle signal, and inputting the rolling fin rotation angle signal into the electric motor drive to control the fin stabilizer to rotate.

The invention provides a method for installing and positioning a front-propeller hydrodynamic energy-saving device, which comprises the following steps of: respectively defining two ends of a guide pipe of the energy-saving device as a head end and a tail end according to the head-tail direction of a ship, and selecting at least three positioning points at the edge of the tail end of the guide pipe; the energy-saving device is hoisted to the rear portion of the designed position of the stern; a total station is installed behind the ship, the coordinate origin of the tail shaft outlet is found through the total station, and the coordinate origin is the center point of the tail shaft outlet; monitoring the coordinate position of each positioning point by using a total station, and adjusting the position of the energy-saving device; the energy-saving device is moved in the axis direction of the ship stern shaft, so that the energy-saving device translates towards the ship, and the interference allowance of the energy-saving device and the ship is cut off; and welding is conducted after the energy-saving device is adjusted in place. According to the scheme, one total station is used for positioning the three positioning points, operation is easy, accurate construction can be conveniently achieved, the construction period is shortened, and then the dock occupation time is shortened.

The invention provides a gas anti-drag jet device and a ship. The gas anti-drag jet device comprises a gas supply assembly. One end of the flow guide pipe is connected with the air supply assembly, and the other end of the flow guide pipe is configured to be communicated with a through hole in a ship bottom flat plate; and the flow guide cover is configured to cover the through hole from the side, away from the flow guide pipe, of the ship bottom flat plate, so that a narrow slit is formed by the flow guide cover and the ship bottom flat plate, and the narrow slit is used for allowing gas to be sprayed out and enabling the gas to flow along the ship bottom flat plate. The gas anti-drag air injection device occupies a small area of a flat plate at the bottom of the ship, is easy to arrange, and can reduce the adverse effect of the gas anti-drag air injection device on the performance and structure of the ship body.

The invention discloses a water-air cross-medium unmanned platform mode conversion aircraft. The water-air cross-medium unmanned platform mode conversion aircraft comprises a shell structure, a mode conversion mechanism and a bionic front fin structure. The mode switching mechanism switches different working modes when the aircraft is in an underwater navigation mode and a flight mode, when the aircraft is in the underwater navigation mode, the separable shell and the bionic shell are attached to each other to ensure the streamline appearance of the aircraft in the underwater mode, and when the aircraft is in the flight mode, the separable shell and the bionic shell are attached to each other to ensure the streamline appearance of the aircraft in the flight mode. A separable shell and a bionic shell in the shell structure are separated from each other, the position of the separable shell is located over the position of an underwater mode, and during mode conversion, the separable shell is controlled by a lifting push rod on the lower portion to ascend and descend. Different propulsion modes are selected according to the navigation modes of the aircraft in different media, and the mutual influence between the two propulsion modes is reduced to the minimum through reasonable arrangement of a variant scheme.

The invention relates to the technical field of ship manufacturing, in particular to a ship stern post welding device which comprises a main plate body, a moving mechanism is arranged at the top end of the main plate body, the moving mechanism comprises two first lifting plates, the two first lifting plates are provided with through grooves, and the two first lifting plates are arranged on the left side and the right side of the top end of the main plate body correspondingly; according to the ship sternpost welding device, a fifth motor is started to enable a second fixing rod to rotate, arc-shaped grinding is conducted on the non-welded positions of the sternposts through grinding pieces, the welding efficiency is improved, the welding quality is improved, and the welding quality of the sternposts is improved. And the outer side walls of the clamping blocks make contact with the slotting positions of the outer side walls of the stern columns, so that the outer side walls of the stern columns are clamped and fixed through the clamping blocks in the grinding process, the welding quality is improved, it is guaranteed that the welding positions of the two sets of stern columns are completely attached, and the connecting strength of the two sets of stern columns after welding is improved.

A ship bow wind guiding device comprises a supporting structure, a wind guiding structure and a wind guiding structure, the wind scooper is installed on the supporting structure, covers a bow and is in a curved surface shape extending backwards, a downward concave part is arranged in the middle of the top of the wind scooper, a notch is formed in the middle of the wind scooper when the wind scooper is seen in the front-back direction of the ship, and the highest point of the wind scooper is located below the highest point of a first row of containers on a deck of the ship. And the bottom of the concave part is positioned below the lowest requirement of the operation observation sight line of the ship. The downward concave part is arranged in the middle of the top of the wind scooper, the highest point of the wind scooper is located below the highest point of the first row of containers on the deck of the ship, the bottom of the downward concave part is located below the lowest requirement of the control observation sight line of the ship, and therefore the wind scooper can be prevented from blocking the control observation sight line; and the requirement of manipulating observation sight is met.

The invention discloses a functional gradient buffer structure suitable for a high-speed water entry process of a cross-medium navigation body, and aims to effectively improve the structural safety and integrity of the navigation body when the navigation body bears a high impact load. The structure mainly comprises a pointed arch-cylinder combined housing, a functional gradient buffer layer and a locking device. Wherein the functional gradient buffer layer is formed by sequentially and tightly attaching high-density (200kg / m < 3 >) rigid polyurethane foam, medium-density (100kg / m < 3 >) rigid polyurethane foam and low-density (50kg / m < 3 >) rigid polyurethane foam, a filling structure with gradually-decreased density is formed in the axial direction, the functional gradient buffer layer is arranged in a cavity between the housing and the navigation body, and the low-density layer is close to the head of the navigation body. The locking device achieves axial limiting and anti-falling fixing of the housing through an annular structure. Under the condition of 100 m / s vertical entry water impact, numerical simulation analysis shows that the structure can reduce the peak value of the impact load coefficient borne by the navigation body to 0.88, and compared with a single-layer buffer structure with the same volume density (100 kg / m < 3 >), the impact load coefficient of the structure is reduced by 27.3%.

The invention discloses a method for installing a tail-sliding small boat roller at a dock stage, which is characterized in that the tail-sliding small boat roller originally installed at a mooring test stage is advanced to the dock stage to be installed, and the original water-facing operation is changed into ground operation, so that the safety risk caused by the water-facing effect is effectively solved, and the service life of the tail-sliding small boat is prolonged. Ground operation is carried out in the dock stage, a simulated small boat does not need to be manufactured, the risk of toppling of the simulated small boat does not exist, only one bilge auxiliary installation tool needs to be manufactured to install the bilge inclined roller, the horizontal roller can be installed according to the marking position of the center line of the tail gate, the installation period can be greatly shortened, the period length is fixed and controllable, and the installation efficiency is improved. And meanwhile, the labor intensity is also reduced.

Disclosed is a method of reducing drag on the hull of the vessel by creating a Coanda flow on the hull by jetting a fluid onto the hull or surface continuous with hull. The fluid is jetted onto the hull or surface continuous with the hull at a location above or below the waterline of the vessel. The fluid is jetted from within a habitat positioned at least partially below the waterline, the habitat being vented to atmosphere. The habitat has an open end below the waterline. The Coanda flow extends entrains air below the waterline and adjacent to the hull. An air cavity or sheet is created by the jetted fluid. A system for reducing drag is also disclosed.

The invention relates to the technical field of ship construction, in particular to a ship superstructure combined type bulkhead structure and a manufacturing method. By combining the straight bulkhead and the groove-shaped bulkhead, on one hand, the groove-shaped joints on the groove-shaped bulkhead can reduce welding heat input deformation, reduce the original construction object quantity and the structural light weight, and ensure the rigidity of the bulkhead structure in the height direction; and on the other hand, the outfitting open hole is formed in the flat and straight bulkhead, so that the opening precision of the outfitting open hole is conveniently controlled, and effective connection of the penetration piece and the bulkhead structure is realized. And meanwhile, the stiffener is arranged, so that the bulkhead structure is reinforced in the through direction of the outfitting opening. The center line and the folding line of the groove-shaped node are surveyed on the wall plate of the combined type bulkhead structure in advance, so that the subsequent precision inspection of the combined type bulkhead structure is facilitated, the operation is simpler, and the inspection result is clear at a glance.

A system and method for enhancing marine vessel efficiency through integrated hull optimizations is disclosed. The system includes automated bow thruster covers that reduce hull drag and condition water flow, coupled with strategically positioned air lubrication nozzles that create and maintain an air layer under the vessel. The bow thruster covers may be configured as circular doors or parallel panels, optionally incorporating air discharge ports or working in conjunction with dedicated air jets. An intelligent control system optimizes the integrated components using real-time sensor data and computational fluid dynamic analysis. The system modulates air distribution and cover positions based on sea conditions and vessel speed, maintaining optimal efficiency during operation. External surfaces may incorporate superaerophilic structures to enhance air retention and reduce drag. The comprehensive integration of these components provides improved hydrodynamic efficiency while maintaining full bow thruster functionality when required.

The invention provides a gas drag reduction ship. The gas drag reduction ship comprises a ship bottom flat plate; the at least one group of gas anti-drag air injection mechanisms are arranged at the incident flow end of the inner side of the ship bottom flat plate, the number of the gas anti-drag air injection mechanisms in each group is at least one, when the number of the gas anti-drag air injection mechanisms is one, the gas anti-drag air injection mechanisms are arranged on the middle longitudinal section line of the ship bottom flat plate, and when the number of the gas anti-drag air injection mechanisms is multiple, the gas anti-drag air injection mechanisms are arranged on the middle longitudinal section line of the ship bottom flat plate. The multiple gas resistance-reducing air injection mechanisms are symmetrically arranged relative to the middle longitudinal section line of the ship bottom flat plate, and the gas resistance-reducing air injection mechanisms inject air through the through holes in the ship bottom flat plate; each gas resistance-reducing gas injection mechanism at least corresponds to one flow guide cover, the flow guide covers are arranged in the through holes of the ship bottom flat plate and located on the outer side, a narrow slit is formed by the flow guide covers and the ship bottom flat plate, and the narrow slit is used for allowing gas to be injected out and enabling the gas to flow along the ship bottom flat plate. According to the gas resistance reduction ship, the projection of the gas resistance reduction air injection device in the ship width direction does not need to cover the whole ship width, and the whole ship width coverage of a gas layer can be achieved.

The marine gas resistance reduction device is characterized in that the marine gas resistance reduction device comprises gas supply equipment, an air pipeline arranged in the length direction of the ship and a plurality of flow guide structures, and the flow guide structures are obliquely arranged on a ship bottom shell plate at intervals; the included angle between the arrangement direction of each flow guide structure and the water flow direction is smaller than 90 degrees, and the air pipeline communicates with air supply equipment and an air separation cavity between each flow guide structure and the hull bottom shell plate. The ship comprises the drag reduction device. The gas separation cavity is formed between the flow guide structures which are continuously arranged and the ship bottom shell plate, the generation range and the generation effect of the gas film layer are expanded, gas in the gas separation cavity is blocked by the flow guide structures which are arranged front and back in the dissipation process, the gas loss speed is reduced, and through the design that the flow guide structures are not perpendicular to the water flow direction, the gas film layer generation effect is improved. The resistance borne by the flow guide structure is reduced, and the resistance reduction effect of the marine gas resistance reduction device is improved on the whole.

The invention provides a ship outer plate invisible pneumatic air intake and exhaust device which comprises an air intake and exhaust box body, an invisible air intake and exhaust cover, a driving shaft and at least one linkage arm, and the air intake and exhaust box body is provided with an internal space; the hidden air inlet and outlet cover opens an opening in one side of the air inlet and outlet box body through opening and closing. The driving shaft is arranged in the internal space, and one end of the driving shaft rotatably extends out of the intake and exhaust box body; one end of at least one linkage arm enables a movable column on the invisible air inlet and exhaust cover to move along a long hole through the long hole, and the other end of the linkage arm is rotatably connected to the driving shaft. The rotating device is connected with the driving shaft so that the driving shaft can rotate along the axis. Opening and closing of the invisible air intake and exhaust cover are achieved through rotation of the driving shaft, and the technical problem that in the prior art, a ship outer plate invisible pneumatic air intake and exhaust device meeting invisibility and corrosion resistance is lacked is solved.

The turbulence friction resistance reduction device based on array type corona micro-blowing comprises a corona discharge cavity plate (1) and a discharge electrode (2). A plurality of cylindrical inclined micro holes are formed in the front face of the corona discharge cavity plate (1) and serve as corona discharge anodes, the cylindrical inclined micro holes are distributed in the front face of the corona discharge cavity plate (1) in an array mode, and the inclined directions of the cylindrical inclined micro holes are changed in a staggered mode. The high-voltage direct-current power supply (4) generates direct-current high voltage and applies the direct-current high voltage to the discharge electrode (2), plasma (6) is generated between the discharge electrode (2) and the corona discharge cavity plate (1), two oblique jet flows of each discharge group are coupled to form spirally-rising jet flows, a normal blowing effect is generated in a flow field, and turbulent friction resistance reduction is achieved. The invention further provides a turbulence friction resistance reduction device and method based on array type corona discharge. The sensor is arranged in a flow field to collect flow field data, the flow field state is sensed in real time, the corona discharge mode is controlled, the optimal resistance reduction effect is kept in the rapidly-changed flow field state, and the resistance reduction adaptability is further improved.