带有横向扩展出口的气膜冷却孔的紊流流场研究

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报道了用热线风速仪和流动可视化技术对带有横向扩展型孔的燃气轮机气膜冷却叶片紊流流场进行的研究.试验了三种射流/主流质量流量比,即%M%分别等于0.5, 0.89, 1.5的情况.测量了主流速度、紊流强度以及雷诺剪应力.通过分析沿主流方向和展向方向各紊流量的空间分布,可以得知横向扩展型孔对燃气轮机气膜冷却叶片紊流流场的改善状况.研制了发生干冰气雾的实验装置,并将其应用于观察射流与主流复杂的相互作用.流动可视化结果与热线风速仪测量结果相一致.
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