The diffuser is necessary because the existing Mach number on Verdichteraustritt 〖Ma〗_2≈0.5 on a contractual Mach number for the combustion chamber of 〖Ma〗_3 <0.15 has to be reduced. Very often, it is included into the compressor diffuser with, as this is the case in Figure 2.16. The Verlusterfassung can then be done byThe polytrope Verdichterwirkungsgrad η_tV also includes the Diffusorverluste.
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