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RISCorrelated Pressure–Velocity Instability in a Transonic High-Pressure Turbine Blade
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The present work describes the coupled pressure–velocity instability in the suction side boundary layer of a transonic high-pressure turbine blade. The application case is the VKI LS89 turbine blade MUR237. Modal decomposition ...
The Impact of Inflow Unsteadiness on Loss Prediction
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Stagnation pressure loss coefficient is still the most commonly used loss metric for performance evaluation and is routinely used to validate simulations. This is because it is easy to measure and readily available from ...
Analysis of the Loss Production Mechanism Due to Cavity–Main Flow Interaction in a Low-Pressure Turbine Stage
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In the present work, URANS simulations are presented to describe the unsteady interaction process between the flow ingested/ejected from a cavity system and the main flow evolving into a low-pressure turbine stage. Particular ...
The Role of Turbulence Transport in Mechanical Energy Budgets
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this article, we study the role of turbulence transport on loss prediction using high fidelity scale-resolving simulations. For this purpose, we use eight high-fidelity simulation datasets and compute flux of entropy ...
On Turbulence Measurements and Analyses in a Two-Stage Two-Spool Turbine Rig
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Since the experiment in turbulence research is of very high importance for evaluating turbulence hypothesis, turbulence measurements were carried out in a two-stage two-spool transonic turbine test rig at the Institute for ...
Development of a Turning Mid Turbine Frame With Embedded Design—Part I: Design and Steady Measurements
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The paper presents a new setup for the twostage twospool facility located at the Institute for Thermal Turbomachinery and Machine Dynamics (ITTM) of Graz University of Technology. The rig was designed in order to simulate ...
Development of a Turning Mid Turbine Frame With Embedded Design—Part II: Unsteady Measurements
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper, the second of two parts, presents a new setup for the twostage twospool facility located at the Institute for Thermal Turbomachinery and Machine Dynamics (ITTM) of Graz University of Technology. The rig was ...
Free-Stream Turbulence-Induced Boundary-Layer Transition in Low-Pressure Turbines
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The aerodynamic efficiency of turbomachinery blades is profoundly affected by the occurrence of laminar-turbulent transition in the boundary layer since skin friction and losses rise for the turbulent state. Depending on ...
Effects of Upstream Wakes on the Boundary Layer Over a Low-Pressure Turbine Blade
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In the present work, the evolution of the boundary layer over a low-pressure turbine blade is studied using direct numerical simulations, with the aim of investigating the unsteady flow field induced by the rotor-stator ...