Pulse synergistic jet control device and method for significantly improving rotor aerodynamic characteristics

Abstract

The invention provides a pulse coordinated jet control device and method for significantly improving the aerodynamic characteristics of a rotor. The device includes: setting a jet port in a low-pressure area of ​​the leading edge of the airfoil, and setting an air inlet in the high-pressure area of ​​the trailing edge of the airfoil; A semi-circular groove is arranged on the cover plate near the air jet; a semi-cylinder with the same radius is installed in the semi-circular groove; the radius of the semi-cylinder is equal to the maximum height of the air jet; wherein: the The maximum height of the jet port is: the height of the jet port along the normal direction of the upper surface of the airfoil when the jet port is in a fully opened state. The semi-cylinder is driven by a driving motor to rotate clockwise or counterclockwise, thereby realizing a sinusoidal half-wave pulse jet. The invention has the following advantages: the present invention can significantly improve the effective lift-drag ratio of the rotor airfoil, thereby improving the aerodynamic characteristics of the rotor. It also has the advantages of simple structure, high reliability and convenient processing.

Description

technical field [0001] The invention belongs to the technical field of active flow control, and in particular relates to a pulse cooperative jet control device and method for significantly improving the aerodynamic characteristics of a rotor. Background technique [0002] The rotor is the main lift and control part of the helicopter, and its aerodynamic characteristics directly affect the flight quality of the helicopter. Among them, the hovering performance of the helicopter is closely related to the maximum lift that the rotor can generate, and the forward flight performance is limited by the high-speed and high-lift performance of the forward blade and the stall performance of the backward blade at low speed and large angle of attack. The airfoil is the basic element of the helicopter rotor. Therefore, how to improve the high lift-to-drag ratio and high angle-of-attack stall characteristics of the rotor airfoil, and then improve the aerodynamic characteristics and flow ch...

AI Technical Summary

Problems solved by technology

This method consumes a lot of energy, and with low energy consumption, the effect of suppressing flow separation and increasing lift and reducing drag is not good, thus reducing the maximum lift coefficient of the synergetic jet airfoil

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