ABSTRACT
The word turbomachine is derived from the Latin word turbo, which means whirl or something that spins. Such a term includes various types of machines involving pressure head, such as compressors, pumps, blowers, turbines, and so forth. The common feature of all these machines is that they all have a rotating shaft on which are mounted a number of vanes, which move because the working fluid comes into contact with them. Such contact produces a change of momentum, and this change in momentum for the working fluid results in motion of the vanes. A turbomachine can be defined as a device in which energy transfer occurs between a fluid in motion and a rotating shaft due to dynamic action, which results in changes in pressure and fluid momentum. These are different from positive-displacement machines such as a reciprocating piston cylinder, because in such machines the work input or output is primarily due to moving boundaries.
