涡轮直列叶栅中二次流损失预测模型
SECONDARY FLOW LOSSES IN PLANE TURBINE CASCADES AND ITS MATHEMATICAL PREDICTION MODEL
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摘要: 本文根据已有的试验数据,提出了预测二次流损失分布的数学模型。用该模型计算得到的结果同试验数据比较,精度是满意的,且此其它已有的模型更接近实际情况。Abstract: The phenomenon and cause of the secondary flow in plane turbine cascades are discussed and a mathematical prediction model of losses is presented. It is stressed that the secondary flow in turbine cascades is a dynamic but not a kinematiceffect and thus should be studied from the viewpoint of dynamics. Based on the results of plane cascade tests, a model that predicts the secondary flow loss distribution is suggested. The effect of inlet boundary layer has been consideredin the model. Precision obtained from the proposed model conforms more satisfactorily with experimental results than those given in previous literatures.
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