依透视投影法的冲击式水轮机水斗形状可视化  

Numerical Visualization of Rotating Buckets of Impulse Water Turbine by Perspective Projection

作　　者：韩凤琴[1] 丁二喜[1] 沈娜[1] 李龙祥[1] 久保田乔[1] 胡宇锭 

机构地区：[1]华南理工大学电力学院,广东广州510640 [2]罗定水轮机厂,广东罗定527200

出　　处：《水电能源科学》2008年第4期157-159,156,共4页Water Resources and Power

基　　金：国家自然科学基金资助项目(50679027)

摘　　要：针对三维非正交曲线坐标系下对冲击式水轮机用平行投影法进行可视化投影缺乏现实性、旋转水斗内自由水膜随时空变化非定常的问题,为得到可视化流动解析结果并保持现实感,采用透视投影法最具有现实感。论述了透视投影法的理论依据,并根据转动坐标系和静止坐标系下不同视点和投影图心得到相应的投影结果,与文献摄影结果进行了比较分析,确认了有效性。Since the Pelton buckets have the complicated 3D-free surface defined in the non-orthogonal curve-linear coordinate system, their numerical visualization with the parallel projection method is not appropriated. Moreover, the flow pattern in the rotating Pelton buckets is so variable in space and time unsteadily, the numerical visualization in real-feel is indispensable to understand the flow analysis results. This paper presents the theoretical procedure how to visualize the real-feel pictures of buckets by introducing the eye-position vector and the centroid-position vector for the perspective projection plane in the rotating and stationary coordinate systems respectively.

关 键 词：视点矢量 图心矢量 透视投影法 可视化画像 水斗 冲击式水轮机 

分 类 号：TK739[交通运输工程—轮机工程]