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Acknowledgements
The following companies kindly provided figures.
For fans: ebm-papst; Fläkt Woods; TLT-Turbo.
For pumps: ANDRITZ; Flygt (a Xylem company); Grundfos; Johnson Pump
(SPX Flow Technology); Klaus Union; Sulzer; Sundyne; Wilo.
For steam turbines: Alstom; MAN Diesel &Turbo; Siemens Energy.
For hydraulic turbines: ANDRITZ HYDRO.
For wind turbines: ENERCON; Vestas.
For power gas turbines: Mitsubishi-Hitachi Power Systems; Siemens Energy.
For aero gas turbines: GE Aviation; Rolls-Royce.
For radial compressors, radial turbines and turbochargers: ABB Turbo Systems;
Dresser-Rand; KBB Kompressorenbau Bannewitz; MAN Diesel &Turbo.
The following publishers gave permission to reprint figures.
ASME; SAGE Publications; Springer Verlag; Vogel Buchverlag.