Rotor type determination method and system

Abstract

The invention relates to a rotor type determination method and system. The method comprises the steps of under the current iteration number, according to the rotor type under the last iteration number, obtaining the calculation pressure coefficient of each point on the rotor wing blade section under the current iteration number; based on the target pressure coefficient of each point on the profile of the rotor blade and the calculated pressure coefficient of each point on the profile of the rotor blade under the current number of iterations, obtaining a rotor type under the current number of iterations; calculating an equivalent attack angle under the current iteration number according to the rotor type under the current iteration number; judging whether the absolute value of the difference value between the equivalent attack angle under the current iteration number and the equivalent attack angle under the last iteration number is within a set range; if yes, determining the rotor wing type under the current iteration number to be the final rotor type; and if not, updating the number of iterations and carrying out next iteration. The rotor obtained through the method has the good airfoil aerodynamic characteristic.

Description

technical field [0001] The invention relates to the field of rotorcraft, in particular to a method and system for determining a rotor airfoil. Background technique [0002] Helicopters have unique flight characteristics of vertical take-off and landing and hovering, which can effectively reduce the requirements on the environment of the take-off and landing sites, and thus have been widely used. In terms of civilian use, helicopters are often used in areas with narrow spaces and complex terrain such as disaster relief and patrol; in military terms, helicopters are often used in special fields such as special transportation, ground attack, and shipboard early warning. Therefore, the development of advanced helicopter technology research is an important guarantee for the wide application of helicopters. Among them, the rotor is the key lift and control component of the helicopter. As an important aerodynamic component of the helicopter, it provides the helicopter with the pul...

AI Technical Summary

Problems solved by technology

[0003] Aerodynamic characteristics of the rotor airfoil In the three-dimensional environment, the rotor blade section airfoil is affected by downwash flow, span flow, and paddle / vortex interference, and its equivalent angle of attack will change greatly. The existing design rotor airfoil The equivalent angle of attack was not considered, resulting in a less than ideal rotor design

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