High head turbine: In this type of turbines, the net head varies from 150m to 2000m oreven more, and these turbines require a small quantity of water. Example: Pelton wheelturbine.Medium head turbine: The net head varies from 30m to 150m, and these turbin...[继续阅读]

    Turbine shaft can be either vertical or horizontal. In modern practice, Pelton turbinesusually have horizontal shafts whereas the rest, especially the large units, have vertical shafts....[继续阅读]

    The specific speed of a turbine is defined as the rotating speed of a geometrically similarturbine that will develop unit power when it works under a unit head (1m head). It isprescribed by the relation Low specific speed turbine: The specific speed is le...[继续阅读]

    Based on the pressure change of liquid when it flows through the runner, turbines can begrouped into two types. One type is the impulse turbine, which utilizes the kinetic energy of ahigh-velocity jet of water to transform the water energy into mechanical...[继续阅读]

    The differences between Impulse and Reaction Turbines are listed in Table 1.1.Table 1.1 Differences between Impulse and Reaction TurbinesContinue...[继续阅读]

    1. Explain the classification of turbines.2. Classify the turbines based on head, specific speed and hydraulic actions. Giveexamples for each.3. List the differences between impulse turbines and reaction turbines....[继续阅读]

    [1] S. Sarkar, Gautam Biswas, S.K. Som and IIT Kanpur. Lecture 4 Turbines, Classification,Radial flow turbines, Axial flow turbines [DB/OL]. (2009-12-31) [2006-06-16].http://nptel.ac.in/courses/105107059/module6/lecture4/lecture4.pdf....[继续阅读]

    accelerate 加速 adjustable-blade 调节叶片 airtight 密封的 atmospheric pressure 大气压 axial direction 轴向 axial flow turbine 轴流式水轮机 axial line 轴线 axis 轴 band 下环 Benoit Fourneyron 贝努瓦·富聂隆 blade axis 叶片轴 blade 叶片 bucket 斗叶；叶...[继续阅读]

    Water is brought to the hydroelectric plant site through large penstocks, at the end ofwhich there is an injector, which converts the pressure energy completely into kinetic energy,as shown in Fig.2.1. This will convert the liquid flow into a high-speed j...[继续阅读]

    This has to be provided for movement of the spear. If the servomotor is outside thenozzle, a bend has to precede the straight portion of the nozzle to allow the spear stem to bebrought out. In this type, the symmetry of the flow is only in one plane and t...[继续阅读]