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Centrifugal compressor
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=== Diffuser === [[File:NASA CC3 impeller and wedge diffuser.jpg|thumb|upright= 1.35|Figure 1.3 - NASA CC3 impeller and wedge diffuser]] The next component, downstream of the impeller within a simple centrifugal compressor may the diffuser.<ref name="Japikse&Baines"> {{cite book|author=Japikse, David |author2=Baines, N.C. |title=Diffuser Design Technology |year=1998 |publisher=Concepts ETI . |isbn=978-0-933283-01-5}}</ref><ref name="Aungier"/> The diffuser converts the flow's kinetic energy (high velocity) into increased potential energy (static pressure) by gradually slowing (diffusing) the gas velocity. Diffusers can be vaneless, vaned, or an alternating combination. High-efficiency vaned diffusers are also designed over a wide range of solidities from less than 1 to over 4. Hybrid versions of vaned diffusers include wedge (see Figure 1.3), channel, and pipe diffusers. Some turbochargers have no diffuser. Generally accepted nomenclature might refer to the diffuser's lead edge as station 3 and the trailing edge as station 4. Bernoulli's fluid dynamic principle plays an important role in understanding diffuser performance. In engineering situations assuming adiabatic flow, this equation can be written in the form: Equation-1.3 :<math>\left(\left(\frac {v^2}{2}\right)+\left(\frac {\gamma}{\gamma-1}\right)\frac {p}{\rho}\right)_2 = \left(\left(\frac {v^2}{2}\right)+\left(\frac {\gamma}{\gamma-1}\right)\frac {p}{\rho}\right)_4</math> where: *{{mvar|2}} is the inlet of the diffuser, station 2 *{{mvar|4}} is the discharge of the diffuser, station 4 *(see inlet above.)
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