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This paper deals with power up method of a cross flow type wind turbine having excellent safety. The wind turbine is set vertically within a pair of guide vanes whose horizontal cross sections are 1/4 cylindrical. On wind tunnel tests, some setting condition of guide vanes led to higher power coefficient of the wind turbine than without guide vanes. When this system was set to optimum direction for wind direction, the output of the wind turbine was about 2 times of the one without guide vanes. Mechanism of performance improvement due to two guide vanes was to be apparent by two kind of experiments ; investigating torque of one blade within 12-blades of the rotating turbine and flow around the turbine with/without guide vanes. Furthermore, effect of the guide vanes was confirmed by the field test.

Performance Improvement of a Cross Flow Wind Turbine by Guide Vanes Considered Primary Wind Direction