An enhanced ion propulsion vessel platform

Abstract

The application discloses an enhanced ion propulsion ship platform, which comprises a ship body, a rudder, an enhanced ion thruster and a high-pressure generating module. A plurality of enhanced ion thrusters are coaxially connected in series through connecting rods in a propulsion direction and are installed on a tail deck of the ship body. The enhanced ion thruster comprises an acceleration duct, two groups of supports are installed in the acceleration duct, each group of supports comprises two electrode supports, first electrodes in the form of sheets are uniformly arranged on the electrode supports close to the connecting rods, and second electrodes in the form of sharp shapes are uniformly arranged on the electrode supports on the other side. The number of the enhanced ion thrusters to be connected and the electrode voltage required are controlled to meet the required thrust of the ship at different speeds. The particle swarm algorithm is used to determine the minimum ship resistance, and the best longitudinal inflow angle and outflow angle are obtained to realize the efficient operation of the low-speed ship platform. The application has the advantages of simple structure, economy, lightness, easy popularization and suitability for various water surface low-speed operation systems.

Description

Technical Field

[0001] This invention relates to the field of ships and marine structures, and more specifically to an enhanced ion propulsion ship platform. Background Technology

[0002] The development and application of various new types of ship platforms are indispensable for water navigation. Due to relatively harsh and complex hydrological conditions, the performance requirements for ship platforms are high. For low-speed vessels that are frequently used in shallow waters, traditional underwater propellers face various external limitations, while air propellers generate significant vibration and noise. Therefore, developing a navigation platform with low resistance and low noise levels for low-speed operation in shallow waters is a necessary application solution. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides an enhanced ion-propelled ship platform that exhibits low drag and extremely low noise levels when navigating at low speeds in shallow waters.

[0004] The present invention achieves the above-mentioned technical objectives through the following technical means.

[0005] An enhanced ion-propelled ship platform includes:

[0006] hull;

[0007] The rudder is located at the lower end of the stern of the hull.

[0008] Multiple enhanced ion thrusters are connected in series coaxially along the thrust direction and installed on the stern deck of the hull;

[0009] The high-voltage generation module provides high-voltage electricity to the enhanced ion thruster.

[0010] In the above technical solution, the enhanced ion thruster includes an acceleration conduit, and two sets of supports are installed inside the acceleration conduit. Each set of supports includes two electrode supports. The first electrode is evenly arranged on the electrode support on one side along the forward direction of the ship platform, and the second electrode is evenly arranged on the electrode support on the other side.

[0011] In the above technical solution, the first electrode is sheet-shaped and the second electrode is pointed.

[0012] In the above technical solution, the acceleration conduit is an annular tube of the NACA wing section.

[0013] In the above technical solution, the multiple enhanced ion thrusters are connected in series by connecting rods, which are evenly distributed along the circumferential direction.

[0014] In the above technical solution, the number of enhanced ion thrusters activated and the required electrode voltage are determined in the following way:

[0015] Experiments were conducted to determine the ship's thrust at different speeds, and the enhanced ion thruster was tested and calibrated to determine the thrust corresponding to different voltages.

[0016] For a specific ship speed, first activate and increase the voltage between the electrodes of the first-stage enhanced ion thruster at the stern. If the thrust is insufficient, activate the second-stage enhanced ion thruster and adjust the voltage between the electrodes according to the test calibration data until the thrust meets the requirements at that speed.

[0017] In the above technical solution, the hull shape has longitudinal streamline characteristics.

[0018] In the above technical solution, the method for determining the minimum ship resistance of the hull with longitudinal flow characteristics is as follows:

[0019] Within the feasible engineering domain, combinations of longitudinal inflow and outflow angles are selected, and hydrodynamic calculations are performed to obtain the resistance of the ship platform at the required speed for each set of longitudinal inflow and outflow angles. The minimum ship resistance is determined using a particle swarm optimization algorithm, thus yielding the optimal longitudinal inflow and outflow angles.

[0020] Select the maximum and minimum values ​​of the number of iterations, learning factor, inertia weight, position, and velocity;

[0021] Initialize the swarm particle positions and velocities, the optimal particle position P and optimal value Pbest, and the global optimal position G and optimal value of the swarm.

[0022] The dynamic inertia weight is iteratively calculated, the position and velocity are updated, and the optimal position P and optimal value Pbest of the selected particle and the global optimal position G and optimal value Gbest of the particle swarm are determined. Finally, the optimal position of the optimized particle is the best longitudinal inflow angle and outflow angle of the ship, and the corresponding optimal fitness is the minimum ship resistance value. Thus, the longitudinal inflow angle and outflow angle of the hull are determined.

[0023] In the above technical solution, the cross section of the middle part of the hull is a trapezoidal section with a rounded transition at the bottom.

[0024] In the above technical solution, the rudder is a balanced rudder.

[0025] The beneficial effects of this invention are as follows:

[0026] (1) The ship platform of this invention employs an enhanced ion thruster. The exterior of the enhanced ion thruster is an acceleration duct, and two sets of supports are installed inside the acceleration duct. Each set of supports includes two electrode supports. The second electrode is evenly arranged on the electrode support on the side near the connecting rod, and the first electrode is evenly arranged on the electrode support on the other side. The high-voltage generating module applies a high voltage to the electrodes, generating a high-intensity electric field. Air molecules in the electric field are ionized and move between the electrodes. The air in the entire electric field moves backward, generating forward thrust. The air velocity difference inside and outside the acceleration duct forms an additional thrust on the duct, causing the ship to move forward. The enhanced ion thruster of this invention has greater thrust than ordinary ion thrusters and extremely low noise compared to traditional air propellers, making it suitable for shallow water navigation.

[0027] (2) The navigation capability of the ship platform of the present invention is greatly improved compared with the existing ship platform. The adapted ship type has lower resistance at low speed and the larger internal volume is beneficial to the loading capacity of the ship platform.

[0028] (3) This invention uses particle swarm optimization to determine the minimum ship resistance, thereby obtaining the optimal longitudinal inflow angle and outflow angle, quickly obtaining the optimal ship parameters, reducing the design cycle of traditional design methods and the dependence on the experience of ship designers.

[0029] (4) The present invention controls the number of enhanced ion thrusters connected and the required electrode voltage by the high voltage generation module to meet the thrust required by different ship speeds, and prioritizes the connection and increases the inter-electrode voltage of the first stage enhanced ion thruster at the stern to improve propulsion efficiency. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the enhanced ion propulsion ship platform structure described in this invention;

[0032] Figure 2(a) is a side view of the longitudinally streamlined hull of the present invention;

[0033] Figure 2(b) is a cross-sectional view of the longitudinally streamlined hull of the present invention;

[0034] Figure 3(a) is a cross-sectional view of the enhanced ion thruster of the present invention;

[0035] Figure 3(b) is a side view of the enhanced ion thruster of the present invention;

[0036] Figure 4 This is a schematic diagram of the enhanced ion thruster principle described in this invention;

[0037] In the diagram: 1-hull, 2-rudder, 3-enhanced ion thruster, 4-high voltage generator module, 5-power unit, 6-control unit, 31-acceleration conduit, 32-electrode support, 33-first electrode, 34-second electrode, 35-connecting rod. Detailed Implementation

[0038] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. These embodiments are intended to provide a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the invention should not be limited to the embodiments set forth herein.

[0039] like Figure 1 As shown, the present invention discloses an enhanced ion propulsion ship platform, comprising a hull 1, a rudder 2, an enhanced ion thruster 3, a high-voltage generation module 4, a power unit 5, and a control unit 6. The rudder 2, the high-voltage generation module 4, and the power unit 5 are all capable of receiving signals from the control unit 6.

[0040] As shown in Figures 2(a) and (b), the hull 1 has a hull shape with longitudinal flow characteristics, which enables it to navigate at low speed and with low resistance. As shown in Figure 2(b), the cross section of the middle part of the hull 1 is a trapezoidal section with a rounded transition at the bottom, which gives the hull 1 a large internal volume. As shown in Figure 2(a), the bow of the hull 1 is provided with a small angle of entry into the water.

[0041] As shown in Figure 2(a), in order to adapt to the characteristics of low-speed and low-resistance navigation, the longitudinal inflow angle a2 and outflow angle a1, which have an important influence on the ship's resistance, are selected in a series of combinations within the engineering feasible region to carry out ship hydrodynamic calculations, so as to obtain the resistance of the ship platform under the required speed under each set of a1 and a2, and the minimum ship resistance is determined by the particle swarm algorithm.

[0042] The combination of longitudinal inflow and outflow angles is used as particles, and the number of such combinations is the population size m. The corresponding resistance is the historical best fitness of each particle. Based on engineering characteristics, the number of iterations T = 200, the learning factors C1 = C2 = 1.6, the inertia weights are set to a maximum value Wmax = 0.8 and a minimum value Wmin = 0.4, the position maximum value Xmax = 3 and the position minimum Xmin = -3, and the velocity maximum value Vmax = 1 and the velocity minimum Vmin = -1. The population particle positions X and velocities V, the optimal particle positions P and Pbest, and the global optimal particle positions G and Gbest are initialized. The dynamic inertia weight W is iteratively calculated, the positions X and velocities V are updated, and the optimal particle positions P and Pbest, as well as the global optimal particle positions G and Gbest, are selected. Finally, the optimized particle positions are the best longitudinal inflow and outflow angles of the ship, and the corresponding optimal fitness is the minimum ship resistance value.

[0043] The rudder 2 is located at the lower end of the stern of the hull 1 and is a balanced rudder. The rudder stock of the rudder 2 is located at the longitudinal center of the rudder blade, resulting in a smaller torque when steering.

[0044] The enhanced ion thrusters 3 are installed on the stern deck of the hull 1. The enhanced ion thrusters 3 are configured in multiple groups, and the connecting rods 35 between two adjacent enhanced ion thrusters 3 are evenly distributed in the circumferential direction, so that the thrusters are coaxially connected in series in the thrust direction. This ensures that the thrust of multiple groups of enhanced ion thrusters 3 is in the same direction, and ensures that there is a suitable gap distance between two groups of enhanced ion thrusters 3, which is conducive to the introduction of external air into the acceleration duct 31.

[0045] Referring to Figures 3(a) and (b), the exterior of the enhanced ion thruster 3 is an acceleration conduit 31, which is an annular tube with the cross-section of a NACA wing. Inside the acceleration conduit 31, two sets of supports are installed. Each set of supports includes two electrode supports 32. The second electrode 33 is evenly arranged on the electrode support 32 on the side near the connecting rod 35, and the first electrode 31 is evenly arranged on the electrode support 32 on the other side. The first electrode 31 is plate-shaped, and the second electrode 33 is pointed.

[0046] Both the high-voltage generating module 4 and the power unit 5 are installed inside the stern of the hull 2. The high-voltage generating module 4 can generate a high voltage of over 50kV; the power unit 5 provides power to the high-voltage generating module 4, and the high-voltage generating module 4 provides high-voltage electricity to the enhanced ion thruster 3. Specifically, the power unit 5 and the high-voltage generating module 4 are connected by wires, and the high-voltage generating module 4 is connected to the electrodes of the enhanced ion thruster 3 by wires.

[0047] Figure 4The diagram shows the principle of the enhanced ion thruster 3. After the high voltage generating module 4 applies a high voltage to the first electrode 33 and the second electrode 34 to generate a high-intensity electric field, the air molecules in the electric field are ionized and move between the electrodes, thereby generating an initial air velocity V0. Under the action of the aerodynamic shape of the acceleration duct 31, the air velocity entering the acceleration duct 31 is accelerated to V1, and the air velocity outside the duct is V2, and V1>V0>V2. The air in the entire electric field moves backward to generate forward thrust. The air velocity difference inside and outside the acceleration duct 31 forms an additional thrust on the duct, thereby enhancing the thrust of the ion thruster as a whole.

[0048] The control unit 6, installed inside the hull, controls the rudder angle and the thrust of the enhanced ion thrusters to meet the ship's speed and steering requirements. For specific heading requirements, the control unit 6 controls the rudder 2 to achieve the desired rudder angle. For specific ship speeds, the required electrode voltage and the number of enhanced ion thrusters activated are selected based on the thrust data from the enhanced ion thruster test calibration. Due to the high propulsion efficiency of single-stage enhanced ion thrusters, it is advisable to activate fewer enhanced ion thrusters. Priority is given to activating and increasing the inter-electrode voltage of the first-stage enhanced ion thruster at the stern. If the thrust is insufficient, a second-stage enhanced ion thruster is activated, and the inter-electrode voltage is adjusted (increased or decreased) according to the calibration data until the thrust meets the requirements for that speed. The control unit 6 controls the high-voltage generation module 4 to generate the corresponding voltage and activate the corresponding number of enhanced ion thruster stages. The ship's thrust at different speeds is determined experimentally and stored in the control unit 6. The control unit 6 also stores the thrust corresponding to different voltages calibrated by the enhanced ion thrusters 3 during testing.

[0049] The working principle of the enhanced ion propulsion ship platform of this invention is as follows: The power unit 5 and the high-voltage generation module 4 are activated. The high-voltage generation module 4 applies a high voltage to the electrodes, generating a high-intensity electric field. Air molecules within the electric field are ionized and move between the electrodes. The air in the entire electric field moves backward, generating forward thrust. The speed difference between the air inside and outside the acceleration duct 31 forms an aerodynamic force F1 on the duct. The axial component F11 obtained after orthogonal decomposition of this force is the additional propulsion force. The enhanced propulsion force causes the hull 1 to move forward. See [link to relevant documentation]. Figure 4 .

[0050] Best practice:

[0051] Based on data from a specific waterway, and considering speed requirements and hydrodynamic calculations, the particle swarm optimization algorithm was used to determine the longitudinal inflow angle α2 and outflow angle α1 of the enhanced ion propulsion ship platform to be 46 degrees and 29 degrees, respectively. Table 1 shows the cross-sectional area of ​​the hull, and Table 2 shows the cross-sectional values ​​of the acceleration duct of the enhanced ion propulsion unit.

[0052] Table 1. Cross-sectional area of ​​the hull

[0053]

[0054] In the table, x represents the longitudinal direction of the ship, Lwl represents the length of the ship, Ax represents the cross-sectional area of ​​the entire hull along the longitudinal direction, and Am represents the cross-sectional area of ​​the middle section.

[0055] Table 2 Acceleration Catheter Profile Values

[0056]

[0057] In the table, l represents the length of the acceleration catheter, Yi represents the vertical curve value of the lower part of the acceleration catheter, and Yu represents the vertical curve value of the upper part of the acceleration catheter.

[0058] Based on the data in Table 1, calculation and analysis revealed that, compared with existing low-drag ship hull design methods, the particle swarm optimization algorithm of this invention can obtain the optimal ship parameters more quickly, reducing the design cycle of traditional design methods and the reliance on the experience of ship designers.

[0059] Based on the data in Table 2, calculations and analysis show that, compared with existing ion thrusters, the enhanced ion thruster of this invention can better enhance its propulsion force and can be well matched with suitable low-speed, low-drag ship types.

[0060] The embodiments described above are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Any obvious improvements, substitutions or modifications that can be made by those skilled in the art without departing from the essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A design method for an enhanced ion propulsion ship platform, characterized in that, include: hull(1); A rudder (2) is arranged at the lower end of the stern of the hull (1); Multiple enhanced ion thrusters (3) are connected in series coaxially along the thrust direction and installed on the stern deck of the hull (1); The high-voltage generation module (4) provides high-voltage electricity to the enhanced ion thruster (3); The enhanced ion thruster (3) includes an acceleration conduit (31), which has two sets of supports installed inside. Each set of supports includes two electrode supports (32). The first electrode (33) is evenly arranged on the electrode support (32) on one side along the forward direction of the ship platform, and the second electrode (34) is evenly arranged on the electrode support (32) on the other side. The plurality of enhanced ion thrusters (3) are connected in series by connecting rods (35), which are evenly distributed along the circumferential direction; The number of enhanced ion thrusters (3) turned on and the required electrode voltage are determined in the following manner: Experiments determined the ship thrust at different speeds, and the enhanced ion thruster (3) was used to test and calibrate the thrust corresponding to different voltages; For a specific ship speed, first turn on and increase the voltage between the electrodes of the first-stage enhanced ion thruster (3) at the stern. If the thrust is insufficient, turn on the second-stage enhanced ion thruster (3) and adjust the voltage between the electrodes according to the test calibration data until the thrust meets the requirements at that speed.

2. The design method for the enhanced ion propulsion ship platform according to claim 1, characterized in that, The first electrode (33) is sheet-shaped, and the second electrode (34) is pointed.

3. The design method for the enhanced ion propulsion ship platform according to claim 1, characterized in that, The acceleration duct (31) is an annular tube of the NACA wing section.

4. The design method for the enhanced ion propulsion ship platform according to claim 1, characterized in that, The hull (1) has longitudinal streamline characteristics.

5. The design method for the enhanced ion propulsion ship platform according to claim 4, characterized in that, The method for determining the minimum ship resistance of a hull with longitudinal flow characteristics is as follows: Within the feasible engineering domain, a combination of longitudinal inflow and outflow angles of the hull (1) is selected, and hydrodynamic calculations of the ship are performed to obtain the resistance of the ship platform at the required speed under each set of longitudinal inflow and outflow angles. The minimum ship resistance is determined by particle swarm optimization, and then the optimal longitudinal inflow and outflow angles are obtained: Select the maximum and minimum values ​​of the number of iterations, learning factor, inertia weight, position, and velocity; Initialize the swarm particle positions and velocities, the optimal particle position P and optimal value Pbest, and the global optimal position G and optimal value of the swarm. The dynamic inertial weight is iteratively calculated, the position and velocity are updated, the optimal position P and optimal value Pbest of the selected particle and the global optimal position G and optimal value Gbest of the particle swarm are determined, and the optimal position of the particle is finally optimized as the best longitudinal inflow angle and outflow angle of the ship. The corresponding optimal fitness is the minimum ship resistance value, thereby determining the longitudinal inflow angle and outflow angle of the hull (1).

6. The design method for the enhanced ion propulsion ship platform according to claim 1, characterized in that, The cross section of the middle part of the hull (1) is a trapezoidal section with a rounded transition at the bottom.

7. The design method for the enhanced ion propulsion ship platform according to claim 1, characterized in that, The rudder (2) is a balance rudder.

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