Helicopter combined model wind tunnel test device with independent tail rotor device

Abstract

The invention discloses a helicopter combined model wind tunnel test device with an independent tail rotor device. The device comprises a fuselage model, a fuselage model balance, a main rotor, a mainrotor driving system, a variable pitch mechanism, a main rotor balance, a torque balance, a tail rotor and a support system. The fuselage model is internally provided with a tail rotor balance, a tail rotor motor and a tail rotor transmission mechanism; a first rigid bottom plate and a base are arranged in the fuselage model, the tail rotor motor and the tail rotor transmission mechanism are connected with the floating end of the tail rotor balance through the base, and the tail rotor is fixedly installed on an output shaft of the tail rotor transmission mechanism and keeps the spatial position of the fuselage model unchanged all the time. The tail rotor motor and the tail rotor transmission mechanism are not in contact with other parts; the support system drives the fuselage model, the main rotor and the tail rotor to change positions and postures at the same time. By adopting the helicopter combined model wind tunnel test device with the independent tail rotor device, the positionsand the postures of the fuselage model, the main rotor and the tail rotor can be changed simultaneously in the test process.

Description

technical field [0001] The invention relates to a wind tunnel test device for a combined model of a helicopter with an independent tail rotor device, belonging to the technical field of wind tunnel tests. Background technique [0002] Helicopters have the characteristics of not relying on airport runways, can realize vertical take-off and landing, hover in the air, and fly back and forth, left and right, etc., and play an important role in national economic construction and national defense modernization. In particular, helicopters have outstanding features and advantages such as fast, maneuverable, ultra-low-altitude flight, and can reach any terrain area, and are more and more widely used in military, security and rescue applications. [0003] Compared with fixed-wing aircraft, technical issues such as aerodynamic characteristics, aeroelasticity and noise of helicopters are more complicated. The experience and lessons of developing helicopters in various countries show th...

AI Technical Summary

Problems solved by technology

In this patent, the four-dimensional moving frame will cause great interference to the surrounding flow field of the main rotor, fuselage model and tail rotor, thereby reducing the accuracy of the test, and the efficiency is low, and the high-speed rotation is changed through the independent four-dimensional moving frame The position and attitude of the tail rotor cannot guarantee that the relative position of the tail rotor and the fuselage model is fixed, which will also affect the accuracy of the test data

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