1. M. Dittmann, T. Geis, V. Schramm, S. Kim and S. Wittig, Discharge coefficient of a preswirl system in secondary air systems, Journal of Turbomachinery, 124 (2002) 119–124.
2. C. Bricaude, T. Geis, K. Dullenkopf and H. J. Bauer, Measurement and analysis of aerodynamic and thermodynamic losses in pre-swirl system arrangements, ASME-TurboExpo (2007) GT2007–27191.
3. Y. Yan, M. F. Gord, G. D. Lock, M. Wilson and J. M. Owen, Fluid dynamics of a pre-swirl rotor-stator system, Journal of Turbomachinery, 125 (2003) 641–647.
4. A. Alexiou and K. Mathioudakis, Secondary air system component modelling for engine performance simulations, ASME-TurboExpo (2008) GT2008–50771.
5. M. Dittmann, K. Dullenkopf and S. Wittig, Discharge coefficients of rotating short orifices with radiused and chamfered inlets, ASME-TurboExpo (2003) GT2003–38314.