Turbomachines are defined as all those devices in which energy is transferred to or froma continuously flowing fluid by the dynamic action of one or more moving blade rows. Theword “turbo” or “turbinis” is of Latin origin and implies that which spins or w...[繼續閱讀]

    Two main categories of turbomachines are identified: firstly, those absorb power toincrease the fluid pressure or head (fans, compressors, and pumps); secondly, those producepower by expanding fluid to a lower pressure or head (wind, hydraulic, steam, and...[繼續閱讀]

    Turbomachines are further categorized according to the nature of the flow paths throughthe passages of the rotor. When the path of the through-flow is wholly or mainly parallel to theaxis of rotation, the device is termed an axial flow turbomachine [e.g.,...[繼續閱讀]

    All turbomachines can be classified as either impulse or reaction machines according towhether pressure changes are absent or present in the flow through the rotor. In an impulsemachine all the pressure changes take place in one or more nozzles, the fluid...[繼續閱讀]

    1. Define turbomachines.2. Classify turbomachines according to power, flow path and pressure changes....[繼續閱讀]

    [1] S. L. Dixon and C. A. Hall. Fluid Mechanics and Thermodynamics of Turbomachinery[M]. 6th ed. Oxford: Butterworth-Heinemann, 2010....[繼續閱讀]

    absent 缺少的axial flow 軸流；軸向流動axis of rotation 旋轉軸；轉動軸blade row 葉柵；葉片排category 種類；分類centrifugal compressor 離心式壓縮機compressor 壓縮機diffuser 擴散器；導輪draft tube 尾水管dynamic action 動力作用；動態作用enthalpy 焓e...[繼續閱讀]

    Hydraulic machine is a device in which mechanical energy is transferred from the liquidflowing through the machine to its operating member (runner, piston and others) or from theoperating member of the machine to the liquid flowing through it. Hydraulic m...[繼續閱讀]

    The hydraulic turbine has a long period of development. Its oldest and simplest form isthe water wheel, which was firstly used in ancient Greece and subsequently adoptedthroughout medieval Europe for the grinding of grain, etc. It was a French engineer, B...[繼續閱讀]

    Tangential flow turbines: In this type of turbines, the water strikes the runner in thetangential direction to the wheel. Example: Pelton wheel turbine (Fig.1.2).Fig.1.2 A simplified Pelton turbineRadial flow turbines: In this type of turbines, the water ...[繼續閱讀]