5. Conclusion
The mechanical equation for flow in the fixed parts of turbomachinery is based on the kinetic energy theorem of general mechanics, which states that the increase in energy of a particle is equal to the work of the forces acting on it. Bernoulli's equation for incompressible fluids and Barré de Saint-Venant's equation for compressible fluids are the mechanical equations of flow in fixed components, i.e. in a Galilean frame of reference or frame of inertia.
A reference system fixed on the wheel of a turbomachine is not a frame of reference of inertia. In other words, Newton's second relation, established under Galileo's assumptions, can no longer be applied. From the general theorems of mechanics on relative motion, we know that we can nevertheless apply the same equations as in absolute motion, provided we add two fictitious forces to the forces acting on the system....
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Conclusion
Glossary
Bibliography
Websites
Profluid :
French association for pumps, mixers, compressors and valves
Standards
AFNOR standards : https://www.boutique.afnor.org/norme/
- Centrifugal pumps with axial suction PN10 with support under pump casing – Nominal operating point, main dimensions, designation system. - NF EN 733 - août 1995
- Technical specifications for centrifugal pumps – Class II. - NF EN ISO 5199 - mai 2002
- Pompes...
Laboratories – Design offices – Schools – Research centers (non-exhaustive list)
CNAM (Conservatoire National des Arts et Métiers) Turbomachinery Chair
Appendix: Overview of unsteady effects in a turbomachine
1. Centrifugal pumps
Consider a pump impeller feeding directly into a volute casing. In order to neglect three-dimensional effects, the flow is assumed to be plane, i.e. the thickness of the flow in figure 1...
Bibliography specific to Appendix A
[a] BOULBIN (F.), KERMAREC (J.), PLUVIOSE (M.): Turbine blade forces due to partial admission, Recent advances in compressor and turbine aerothermodynamics, SFM (1992).
[b] PLUVIOSE (M.), PÉRILHON (C.), TOUSSAINT (M.): Machines à fluides, Ellipses (2002).
[c] ZACCARIA (M.), LAKSHMINARAYANA (B.): Unsteady flow field due to nozzle wake interaction with...
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