12 results about "Magnus effect" patented technology

Methods and systems are provided for nautical stationkeeping of free-floating objects. In one example, a method includes adjusting translational motion of a body freely floating in water by rotating the body. The translational motion may be adjusted, for instance, to maintain the body within a geographic area. In certain examples, the adjustment of the translational motion may be realized via a Magnus effect induced by rotating the body. The body may be configured as, for example, a free-floating object such as a wave engine.

To efficiently obtain thrust through the Magnus effect. [Solution] The wind power propulsion device of the embodiment is a wind power propulsion device installed on a ship that generates propulsion force by receiving wind, and comprises a wind turbine sail body that is rotatable about an axis extending vertically from the hull, and a cylindrical lower cylindrical part provided between the hull and the wind turbine sail body, connected to the lower part of the wind turbine sail body, and rotating integrally with the wind turbine sail body.

The invention discloses a method and system for measuring thrust of a wind power boosting rotor, and the method employs a pressure sensor to measure the dynamic pressure of the surface of the rotor, and directly reflects the Magnus effect. Meanwhile, the high-speed wireless communication technology is used for collecting and transmitting data, vibration influence is avoided, the signal noise is low, and the measurement precision is high. Compared with a traditional pressure measuring device, the pressure sensor is directly installed on the surface of the rotor, the pressure does not need to be conducted to the pressure sensing unit through an air pipe, and the problems of pressure loss, pipeline blockage and the like are avoided. Pressure measurement points are arrayed on the surface of the rotor, pressure scanning is conducted in the circumferential direction, and pressure distribution on the surface of the whole rotor is fed back. Finally, wiring is conducted around the main shaft, parts are integrated on the rotating main shaft, and compared with a complex cable data transmission mode, wireless data collection and transmission under the rotating working condition are achieved; a conductive slip ring does not need to be added to the main shaft, the influence of the rotation state is avoided, and the cable winding problem under the rotation working condition is avoided.

The application discloses a hovercraft posture stabilizing device based on Magnus effect, which comprises a pipe beam support fixed behind a duct air propeller, a transverse roller assembly and a longitudinal roller assembly which are perpendicular to each other and rotatable are installed on the pipe beam support, the transverse roller assembly comprises left and right rollers which are horizontally installed on the pipe beam support, the longitudinal roller assembly comprises upper and lower rollers which are vertically installed on the pipe beam support, and a motor which drives the left and right rollers and the upper and lower rollers to rotate. When air flow passes through the rollers, a Magnus force which points to the side of the accelerated air flow is generated on the side of the accelerated air flow. When the hovercraft is lowered, the left and right rollers roll clockwise at the same speed, and a downward force is provided to form a counterclockwise pitching moment together with gravity. When the hovercraft is leftwardly deviated, the left and right rollers roll reversely at the same speed, and a rightward rolling moment is provided to restore a good balance state. When the upper and lower rollers rotate at a high speed, the hovercraft is turned.

The application discloses a kind of wind force boost rotor thrust measurement method and system, adopt pressure sensor measurement rotor surface dynamic pressure, directly react magnus effect.Meanwhile, using high-speed wireless communication technology acquisition transmission data, not by vibration, signal noise is low, measurement precision is high.Compared with traditional pressure measurement equipment, the application directly installs pressure sensor on rotor surface, without using air pipe to conduct pressure to pressure sensing unit, without pressure loss, pipeline blockage and other problems.The application is in rotor surface array pressure measurement point, along the circumferential direction pressure scanning, feedback entire rotor surface pressure distribution.Finally, wiring is carried out around main shaft, by integrating parts on rotating main shaft, compared with complex cable data transmission mode, wireless acquisition and transmission of data under rotating working condition are realized;And without increasing conductive slip ring on main shaft, not by rotating state, avoid cable winding problem under rotating working condition.

The invention provides a rotating cylinder sail and a ship, and relates to the technical field of ships, the rotating cylinder sail comprises a rotating cylinder installed on a ship body, a plurality of blades are arranged on the periphery of the rotating cylinder in the circumferential direction at intervals, the spanwise direction of each blade is parallel to the radial direction of the rotating cylinder, the rotating cylinder rotates in the axial direction and drives the blades to rotate synchronously, and an orthogonal bevel gear assembly is installed in the rotating cylinder; the orthogonal bevel gear assembly is in transmission connection with the blades and used for driving the blades to synchronously rotate in the spanwise direction so as to reduce an airflow channel on the downwind side of the rotary cylinder and increase an airflow channel on the upwind side of the rotary cylinder, and therefore the air speed and pressure on the downwind side of the rotary cylinder are increased, and the air speed and pressure on the upwind side of the rotary cylinder are reduced. The near-wall flow on the surface of the rotating cylinder is effectively shaped, separation is delayed, attachment is more stable, the circular rector generated by the Magnus effect is remarkably increased, a higher lift coefficient and a better lift-drag ratio are obtained under the same incoming flow condition, and the continuity and predictability of propelling force output are improved.

This application provides a rotary sail and a ship, relating to the field of marine technology. It includes a rotary sail installed on the hull, with several blades spaced circumferentially around its outer periphery. The spanwise direction of each blade is parallel to the radial direction of the rotary sail. The rotary sail rotates axially, driving the blades to rotate synchronously. An orthogonal bevel gear assembly is installed inside the rotary sail, and is connected to the blades for transmission. This assembly drives the blades to rotate synchronously along the spanwise direction, reducing the airflow channel on the downwind side of the rotary sail and increasing the airflow channel on the upwind side. This results in increased wind speed and decreased pressure on the downwind side of the rotary sail, and decreased wind speed and increased pressure on the upwind side. The near-wall flow on the rotary sail surface is effectively shaped, separation is delayed, adhesion is more stable, and the circulation generated by the Magnus effect is significantly increased. Under the same incoming flow conditions, a higher lift coefficient and a better lift-to-drag ratio are obtained, improving the continuity and predictability of propulsion output.

The invention provides a single-point mooring floating type fan active yaw control method based on the Magnus effect, and belongs to the technical field of offshore wind power. A wind direction angle is obtained in real time through a wind direction sensor, and the deviation between the wind direction angle and the azimuth angle of a platform main shaft is judged by combining the wind direction angle with the azimuth angle; the system calculates the average wind direction in a set time window so as to suppress the influence of high-frequency wind direction disturbance; the controller dynamically calls a model predictive control (MPC) algorithm according to wind direction deviation, outputs target rotating speeds of the two yaw control devices, and generates stable lift force perpendicular to the incoming flow direction to drive the platform to rotate around a single-point mooring point, so that active wind facing is achieved; the method is matched with a yaw control device, accurate and rapid attitude control can be achieved, and the wind facing capacity and the structural stability of the draught fan are remarkably improved; and the water ballast tank and the variable pitch system can be linked, the adaptability of the platform under the extreme sea condition is enhanced, and the platform has good robustness and engineering feasibility.

To efficiently obtain thrust through the Magnus effect. [Solution] The wind power propulsion device of the embodiment is a wind power propulsion device installed on a ship that generates propulsion force by receiving wind, and comprises a wind turbine sail body that is rotatable about an axis extending vertically from the hull, and a cylindrical lower cylindrical part provided between the hull and the wind turbine sail body, connected to the lower part of the wind turbine sail body, and rotating integrally with the wind turbine sail body.

The present application relates to a method for quickly solving the circulation of airfoils controlled by Magnus and Coanda effect, comprising: determining the circulation of the airfoil without control; studying the increased circulation of the airfoil when the rotation of the rotating body at the tail of the airfoil produces the Magnus effect, and determining it through CFD; studying the increased circulation of the airfoil when the Coanda effect is produced by blowing alone, and determining it through CFD; studying the gain circulation of the airfoil when the rotation of the rotating body at the tail of the airfoil and blowing simultaneously act, and determining it through CFD; determining the total circulation Γ according to the sum of the circulation, the increased circulation, the increased circulation and the gain circulation 总 According to the Joukowski lift formula, the predicted lift is obtained. The present method uses CFD data, combines classical potential flow theory and traditional physical principles, simplifies the relationship between variables, and can greatly improve the prediction efficiency of the controlled flow field, and has strong engineering application value.

Methods and systems are provided for nautical stationkeeping of free-floating objects. In one example, a method includes adjusting translational motion of a body freely floating in water by rotating the body. The translational motion may be adjusted, for instance, to maintain the body within a geographic area. In certain examples, the adjustment of the translational motion may be realized via a Magnus effect induced by rotating the body. The body may be configured as, for example, a free-floating object such as a wave engine.

A system takes advantage of the Magnus effect to increase the efficiency of a moving structure by increasing the forces generated by a fluid moving relative to the structure, e.g., to improve lift, drag, etc. The system includes a structure having a first side and a second side opposite the first side. An object coupled to the structure, e.g., a cylinder, is exposed to a fluid such as air. The object is journaled for rotation relative to the structure so as to disrupt the fluid around the object. A drive source causes the object to rotate relative to the structure so as to cause a select one of an upward lift, or a downward drag.