绊线对H型风轮启动特性的影响

In order to improve startup capacity of H-type wind rotor, the tripwire mounted in the rotor blade is used for flow control. A certain 3-bladed H-type wind rotor has been investigated experimentally. The static torque distribution at different phase angles and the rotation speed curve during startup are obtained. The effect of tripwire on startup characteristics at different wind velocities is detailed analyzed and the rang of wind velocity for tripwire contributing to startup is determined. The experiment results indicate, the static torques at most of phase positions increase on account of tripwire, though the static torques at particular phase positions decrease. In terms of rotation speed curve during startup, at 10-12 m/s, tripwire benefits shortening startup time and increasing no load rotation speed. At 13-14 m/s, tripwire slightly shortens startup time and almost little impact on no load rotation speed. At 15 m/s-18 m/s, the rotation speed curves in the linear speed-up stage between original rotor and rotor equipped with tripwire almost coincide, however, tripwire prolongs the startup time and results in the faster no load rotation speed. Therefore, tripwire is an effective flow control means for improving startup performance and output power.