三维冰形激光测量技术在结冰风洞中的应用

Application of 3D ice shape laser measurement technology in icing wind tunnel

介绍了ROMER绝对关节臂测量仪在结冰风洞中测量冰形三维结构的原理,提出了一种模型-冰形快速重构方法,通过风洞试验获得了典型的霜冰、粗糙冰和羊角冰,使用ROMER绝对关节臂测量仪对积冰三维形貌进行了测量,获得了模型表面的积冰三维数据。结果表明:霜冰三维结果与实际冰形结果高度一致,可以准确地测量出积冰细节特征;三维扫描可以测量出热刀法无法获取的粗糙冰结果;与热刀法获取的羊角冰二维轮廓相比,三维冰形结果在同一剖面的冰形轮廓的结冰范围和冰角高度基本一致,平均冰形厚度偏差约2.5 mm。

The principle of measuring 3D structure for ice accretion in icing wind tunnel with ROMER measuring instrument was introduced,and a fast reconstruction method for model with ice shape was proposed.Typical rime ice,rough ice and horned ice were obtained by wind tunnel test.The 3D morphology of ice accretion was measured by ROMER instrument,and the 3D data of ice accretion on the surface of the model were obtained.The results showed that 3D results of rime ice were highly consistent with the actual ice shape,and the detailed characteristics of ice accumulation can be accurately measured.3D scanning technology can measure the rough ice results which can not be obtained by hot knife method.Compared with the ice trajectory of the shorn ice obtained by the hot knife method,the ice trajectory of the 3D ice shape in the same section had the same icing range and icing level,with the average thickness deviation of ice up to 2.5 mm.