Large Eddy Simulations of Strongly Non-Ideal Compressible Flows through a Transonic Cascade

Transonic flows of a molecularly complex organic fluid through stator cascade were investigated by means large eddy simulations (LESs). The selected configuration was considered as representative the high-pressure stages high-temperature Organic Rankine Cycle (ORC) axial turbines, which may exhibit significant non-ideal gas effects. A heavy fluorocarbon, perhydrophenanthrene (PP11), working to exacerbate deviations from ideal flow behavior. LESs carried out at various operating conditions (pressure ratio and total inlet), their influence on compressibility viscous effects is discussed. thermodynamic behavior generates highly shock systems blade trailing edge. These are shown undergo interactions with transitional boundary layers wakes, an impact loss mechanisms predicted coefficients compared lower-fidelity models relying Reynolds-averaged Navier–Stokes (RANS) equations.