Numerical study on the effects of inlet swirling direction on the turbine guide vane full film cooling effectiveness
To obtain film cooling characteristics for a turbine guide vane under inlet swirling conditions,the effects of clockwise and counterclockwise inlet swirling on the gas turbine first-stage guide vane full film cooling effectiveness were analyzed by numerical simulation.The variation rules of cooling effectiveness of the leading edge,pressure side and suction side were summarized respectively.The results show that the swirling direction of the inlet has an obvious influence on the film cooling effectiveness of the guide vane,and the cooling effectiveness in different regions is affected by the swirling direction differently.The coolant on the vane surface is deflected by swirling flow.On the whole,the film cooling effectiveness of the pressure side of the guide vane is higher when the swirling direction is counterclockwise.The film cooling effectiveness of the leading edge and suction side is higher when the direction of swirl is clockwise.
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