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RISAdaptation of Phase Lagged Boundary Conditions to Large Eddy Simulation in Turbomachinery Configurations
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: With the increase in computing power, large eddy simulation (LES) emerges as a promising technique to improve both knowledge of complex physics and reliability of turbomachinery flow predictions. However, these simulations ...
Numerical Simulation of Aerodynamic Instabilities in a Multistage High Speed High Pressure Compressor on Its Test Rig—Part I: Rotating Stall
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Aerodynamic instabilities such as stall and surge may lead to mechanical failures. They can be avoided by better understanding and accurate prediction of the associated flow phenomena. Numerical simulations of rotating ...
Numerical Simulation of Aerodynamic Instabilities in a Multistage High Speed High Pressure Compressor on Its Test Rig—Part II: Deep Surge
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Aerodynamic instabilities such as stall and surge may occur in compressors, possibly leading to mechanical failures so their avoidance is crucial. A better understanding of those phenomena and an accurate prediction are ...
Delineating Loss Sources Within a Linear Cascade With Upstream Cavity and Purge Flow
Publisher: American Society of Mechanical Engineers (ASME)
Abstract: Purge air is injected in cavities at the hub of axial turbines to prevent hot mainstream gas ingestion into interstage gaps. This process induces additional losses for the turbine due to an interaction between the purge ...
Description of the Flow in a Two-Stage Low-Pressure Turbine With Hub Cavities
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In gas turbine, multi-stage row blading and technological effects can exhibit significant differences for the flow compared with isolated smooth blade rows. Upstream stages promote a non-uniform flow field at the inlet of ...
Steady/Unsteady Reynolds Averaged Navier–Stokes and Large Eddy Simulations of a Turbine Blade at High Subsonic Outlet Mach Number
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Reynoldsaveraged Navier–Stokes (RANS), unsteady RANS (URANS), and large eddy simulation (LES) numerical approaches are clear candidates for the understanding of turbine blade flows. For such blades, the flow unsteady ...
Tonal Noise Prediction of a Modern Turbofan Engine With Large Upstream and Downstream Distortion
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Ultra-high bypass ratio (UHBR) engines are designed as compact as possible and are characterized by a short asymmetric air inlet and heterogeneous outlet guide vanes (OGVs). The flow close to the fan is therefore ...