轴流前弯叶轮叶顶流场特征分析Characteristic of Tip Flow Field of Axial Fan with Forward-skewed Rotor Blade
卢纪富;魏新利;李杨;
摘要(Abstract)：
针对不同化工用前弯叶片的轴流通风机,在额定工况处数值模拟了三维粘性流场以及利用粒子图像测速仪PIV试验测量了叶顶流场。在数值结果与测量结果相吻合的前提下,分析了叶轮近上端壁面极限流线、叶顶轴向速度大小分布以及不同前弯角度叶片对叶顶泄漏流在发展阶段的影响。结果展示了叶顶流场的基本特征-叶顶泄漏涡的初始段和发展段;揭示了叶顶泄漏涡是叶顶流动阻塞的最主要原因之一;叶片前弯角度与叶顶泄漏涡稳定度之间的非线性变化;在泄漏涡发展阶段,涡度随叶片前弯角度之间"先增强后减弱"的变化规律。
关键词(KeyWords)： 轴流通风机;前弯叶片;叶顶流场;涡量
基金项目(Foundation):
作者(Author): 卢纪富;魏新利;李杨;
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参考文献(References)：
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