THE UBIQUITOUS COMPRESSOR: THE IMPELLER

摘要

The impeller is the key component of the compressor stage, even though expert attention must be given to all elements to derive a quality stage; but only the impeller imparts work to the flow, and hence, the total pressure of the fluid (and the total temperature) can only increase in the impeller. Several key considerations enter into the definition of a good impeller: Stage pressure ratio, specific speed, Mach number, range, head rise to surge, and life. Let's consider each of these.