Testing system and testing method for propeller ground test in near space

Abstract

The invention discloses a testing system and a testing method for the propeller ground test in the near space. The system comprises an incoming flow simulation system, a propeller rotating speed control system, a data measurement system and a support. The data measurement system comprises a two-component balance and a data acquisition and control module. The forward velocity and the rotating speed of a propeller are respectively and precisely controlled by a trailer and a motor. The propeller rotating speed control system comprises a motor, wherein the motor is fixed inside the two-component balance. The end portion of the output shaft of the motor extends out of the two-component balance. The propeller is fixed at the end portion of the output shaft of the motor and is driven by the motor to rotate. The support is of a cantilever beam structure, and the rear end of the cantilever beam structure is fixed at the front end of the head part of the trailer and is extending forwardly. The two-component balance is fixed at the front end of the support. According to the technical scheme of the invention, the test state is simulated by utilizing a track trailer. The forward velocity of the trailer is relatively low and the velocity control precision of the trailer is relatively high. Therefore, a stable incoming-flow environment is provided for the propeller.

Description

technical field [0001] The invention relates to a ground test system and a test method for a propeller mounted on a high-precision rail trailer, which is used for the ground test test of the aerodynamic performance of a propeller in a near space at different flight heights, and belongs to the technical field of aerodynamics. Background technique [0002] With the development of energy storage battery technology and brushless motor technology, more and more people pay attention to electric aircraft. Conventional electric aircraft has the characteristics of small size, light weight, low cost, convenient manipulation, flexible maneuvering, low noise, good concealment, etc., and has high military and civilian value. The flying platform powered by solar energy can stay in the air for an infinite period of time, which has become an important direction for the development of modern drones. At present, a notable common feature of electric aircraft is that they all use propeller ele...

AI Technical Summary

Problems solved by technology

However, in domestic low-speed wind tunnels, when the wind speed is lower than 8m / s, it is difficult to guarantee the quality of the flow field, and the simulation is not accurate, which greatly affects the experimental results.

Conventional ground vehicle tests are susceptible to interference from factors such as external wind and ground road conditions, which will have a certain impact on the test results

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