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绕轴旋转物体结冰是一种常见的结冰现象,如风力机叶片和直升机旋翼结冰等。针对该旋转模型的结冰问题,以绕轴旋转圆柱为对象,进行了结冰风洞试验研究。试验在自行设计的利用自然低温的结冰风洞系统中完成。在对结冰风洞试验能力进行验证后,对具有不同直径、转速和结冰时间的旋转圆柱结冰进行了试验,建立了旋转圆柱的结冰分析与评价方法,分析了转速、圆柱直径、结冰时间等对圆柱结冰形状主要特征量的影响规律,包括结冰面积、无因次结冰面积、驻点厚度、无因次驻点厚度、驻点偏转角、无因次结冰上下极限等,获得了旋转圆柱的结冰特性。在此基础上,通过回归正交试验设计,构建了旋转圆柱结冰的预测模型,并进行了验证与分析。研究结果可为绕轴旋转物体结冰特性研究提供参考和借鉴。
Rotating objects around the axis icing is a common icing phenomenon, such as wind turbine blades and helicopter rotor icing and so on. In view of the icing problem of the rotating model, the experimental study of icing wind tunnel was carried out with the rotating cylinder around the axis as object. The experiment was done in a self-designed icing wind tunnel system using natural low temperatures. After verifying the experimental capability of icing wind tunnel, the rotating cylinder icing with different diameters, rotating speed and icing time was tested, and the icing analysis and evaluation method of the rotating cylinder was established. The effects of rotating speed, cylinder diameter, Freezing time, etc. on the main features of cylindrical icing shape, including icing area, dimensionless icing area, stagnation thickness, dimensionless station thickness, stagnation angle, and dimensionless icing up and down Limit, etc., obtained the rotating cylinder icing characteristics. On this basis, through the regression orthogonal experimental design, a prediction model of rotating cylindrical icing is constructed and verified and analyzed. The research results can provide references for the research on icing characteristics of objects rotating around the axis.