The paper describes two methods for the design of blading systems of axial turbines for an Organic Rankine Cycle (ORC) cogeneration unit working with silica oil MDM. The algorithms are based on mathematical models of various levels of complexity – from 1D to 3D. Geometry of flow parts is described with the help of analytical methods of profiling using a limited number of parameters. The 3D turbulent flow model is realised in the software complex IPMFlow, which is developed based on the earlier codes FlowER and FlowERU, or in software complex ANSYS. Examples of developed turbines for a 500 kW machine are presented.
