| Popis: |
It is well-known that experts estimate that traditional energy sources, such as oil, gas and coal, may be depleted in the near future. This raises the question of finding alternative sources. In addition to the use of atomic energy, recent attention has been given to developments in the use of solar and wind energy. In this paper, attention is paid to the design features of the blades of the wind turbine with the vertical axis of rotation. Such wind turbines have a significant advantage over structures with a horizontal axis of rotation, since they do not need to be oriented in the wind direction. The main feature of the design of the considered wind turbines is their blades, which, most often, are compartments of non-expandable helicoidal surfaces, which complicates their manufacture, especially for individual use. In view of all the above, it seems relevant to construct an approximate sweep of the blade, which can be performed using the triangulation method. This method makes it possible, from an engineering point of view, to erroneously construct the contours of the sweep and to determine the approximate area of the blade, and thus to determine the cost of the required material. The paper deals with the method of triangulation for construction of the residential vertical turbine blade sweep, which can be used in a private house. To do this, split the blade height into several equal parts. The second step is to break a certain strip with concentric cylinders. Joining the points of intersection of the edges of the strip with segments, we obtain curvilinear triangles, which after the necessary calculations are transformed into planes. Thus, we create an approximate sweep of one strip across the entire surface. By copying this sweep as many times as we need, we get an approximate sweep for the entire blade. For an approximate calculation of the area of the helical surface, it suffices to find the area of planar triangles with which we have replaced the corresponding curvilinear ones. |
