High-jet-diameter-ratio impulse water turbine and determination method

The invention discloses a high-jet-diameter-ratio impulse water turbine and a determination method, and belongs to the field of fluid machinery. The high-jet-diameter-ratio impulse water turbine is composed of a circular machine shell, direct flow spray pipes and a rotating wheel. According to the key technology, the jet diameter ratio is increased by increasing the number of the spray pipes, the diameter of the direct flow spray pipes and the size of each single water bucket are reduced, and the number of the water buckets is increased. The high-jet-diameter-ratio impulse water turbine has the advantages that under the condition that the unit output is not changed, the unit manufacturing cost is reduced, the rotating wheel incoming flow condition is improved, the rotating wheel section wind resistance is reduced, and the occurrence probability of the phenomena of water bucket cracks and bucket breakage is reduced. 本发明公开一种高射流直径比冲击式水轮机及确定方法，属于流体机械领域，高射流直径比冲击式水轮机由圆形机壳、直流喷管、转轮组成。本发明的关键技术是通过喷管数的增加提高射流直径比，减小直流喷管直径