Method for optimizing propulsion propellers on both sides of composite thrust configuration helicopter

Abstract

The invention discloses a method for optimizing propulsion propellers on both sides of a composite thrust configuration helicopter. The method comprises: the preset propeller geometric parameters areinputted, a aerodynamic model of the propellers on both sides is established, by introducing a pointer algorithm, the required power of the propellers in hover state, cruise state and maximum speed forward flight state is calculated respectively, and then the parameter points satisfying the two constraints are searched by changing the geometric parameters within a reasonable range, after the preset calculation steps are completed, the geometric parameters at the minimum power point of the collection point are output. The method and a system can conveniently solve the problem that the working efficiency of the propellers on both sides of the composite thrust configuration helicopter is low under different flight states, thereby further improving the flight performance.

Description

technical field [0001] The invention relates to the field of helicopters, in particular to a method for optimizing propellers on both sides of a helicopter with a compound thrust configuration. Background technique [0002] Rotor / wing compound thrust configuration helicopters, such as figure 1 shown. [0003] During vertical take-off and landing, hovering and mobile flight, the rotor is driven by the engine as the main lift surface and attitude control surface. During forward flight transition flight, as the flight speed increases, the wing gradually generates lift to unload the rotor, and at the same time lower the rotor When the collective pitch and angle of attack of the propeller disk reach a certain speed, the rotor speed will decrease until it reaches the set value in the high-speed forward flight mode. [0004] It has two sets of lift systems of rotor and fixed wing and corresponding control mechanism. In the state of vertical take-off and landing, hovering and low...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method and system capable of solving the problem of low working efficiency of the propulsion propellers on both sides of the compound thrust configuration helicopter, so as to improve the working efficiency of the propulsion propellers on both sides of the helicopter with this configuration, thereby further improving its flight performance

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