CFDを用いた水平軸風車流入風推定用スピナー圧力計測の最適化

抄録

In the wind turbine performance test, a meteorological mast about the height of the hub is installed 2.5 times the rotor diameter upstream from the wind turbine. However, in recent years, wind turbines have become larger and the construction cost of Meteorological mast has increased. Therefore, we devised a technology to estimate the inflow wind speed by measuring the pressure with a pressure sensor mounted on the spinner of the wind turbine and converting it to the wind speed. This technology has the advantage that it can be performed at a lower cost than the existing inflow observation technology. The purpose of this paper is to clarify the pressure field on the surface of the spinner by CFD analysis and to propose an accurate inflow wind observation technique by proposing an appropriate sensor arrangement. The analysis target was a 3-blade upwind horizontal axis wind turbine with a rotor radius of 0.8 m, and the analysis software was OpenFOAMv1912. As a result, with the proposed sensor arrangement, the wind speed estimation error was less than 1% when the yaw angle was within 15 degrees. In addition, the wind speed estimation error was less than 2%, even considering the temporal pressure fluctuation due to the electrical noise of the sensor.