Airfoil-shaped dynamic aerodynamic characteristic test bench for horizontal-axis wind turbine

Abstract

The objective of the invention lies in providing an airfoil-shaped dynamic aerodynamic characteristic test bench for a horizontal-axis wind turbine, and the test bench comprises a variable propeller module, a moment measurement module, and a tower module. In the variable propeller module, an encoder and a servo motor are respectively connected with vane shafts at the upper and lower ends of a vane, and are fixed on a supporting arm. The supporting arm is hinged to a main shaft through a bearing seat, and is also fixedly connected with the main shaft through a force sensor and a sensing fixing shaft in the moment measurement module. According to the invention, the variable propeller module employs a servo control device, and the servo control device can achieve the dynamic change of an attack angle of the vane. The sensor in the moment measurement module is hinged to a connecting plate, so as to eliminate a moment effect between the sensor and the connecting plate, and guarantee the measurement accuracy of a moment. Four different test bench placing modes are set for an aerodynamic force measurement test, and the test bench carries out the differential processing of multiple groups of test data, thereby achieving the measurement of a vane life force, resistance and a pitching moment, and obtaining the airfoil-shaped dynamic aerodynamic characteristics of the vane.

Description

technical field [0001] This experiment concerns a measuring device whose purpose is to measure the dynamic aerodynamic characteristics of an airfoil. The test bench can realize the dynamic change of the angle of attack and simultaneously measure the lift force, drag force and pitching moment on the blade. Background technique [0002] Wind power can effectively mitigate climate change and improve energy security. In recent years, wind power has gradually become an important part of many countries' sustainable development strategies. Wind turbines are mainly divided into horizontal axis wind turbines and vertical axis wind turbines. With the increasing requirements for wind energy utilization, the vertical axis wind turbine has gradually become an important direction of wind turbine research due to its unique advantages. Compared with the horizontal axis wind turbine, the vertical axis wind turbine has the following advantages: low wind speed and high utilization rate of w...

AI Technical Summary

Problems solved by technology

In the patent document with the application number 201410109066.4, a continuous wind tunnel airfoil dynamic characteristic experiment mechanism is proposed. This mechanism mainly studies the dynamic stall of helicopter blades, and cannot apply the dynamic aerodynamic characteristics of the airfoil of the vertical axis wind turbine.

Although there are many mechanisms or devices for vertical axis wind turbines, there are still few experimental devices that can realize dynamic changes in the angle of attack and simultaneously measure the dynamic aerodynamic characteristics of the airfoil.

Images