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Examples of geometry optimisations carried out on fluid-flow machines: (a) optimisation of the geometry of the blades of a gas microturbine [45]; (b) optimisation of the rotor of an air-breathing radial outflow turbine [46]; (c) optimisation of the guide vanes of an ORC microturbine [47]; (d) optimisation of the disc of a radial-axial turbine [37].
