RANS Simulations of Flows with Shock Wave-Boundary Layer Interaction

Vieira, Rafael Fogarolli; Azevedo, João Luiz F.

doi:10.2514/6.2013-985

Cited by 5 publications

(2 citation statements)

References 13 publications

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“…Still, the complexity of the optimized geometry and the associated flow field raise some questions on the validity of the optimized solution. In particular, as demonstrated in Vieira and Azevedo [142], who compared four different turbulent closures, in presence of a strong shock boundary layer interaction RANS may not predict the flow correctly at the foot of the shock. Michelassi [82] showed that, while the shock strength and position may be captured correctly, the separation at the foot of a strong shock in presence of a downstream adverse pressure gradient was not captured accurately.…”

Section: High-pressure Compressormentioning

confidence: 97%

The Current State of High-Fidelity Simulations for Main Gas Path Turbomachinery Components and Their Industrial Impact

Sandberg

Michelassi²

2019

Flow Turbulence Combust

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Over the past two decades high-fidelity simulations have become feasible for most main gas path turbomachinery components. This paper introduces the key challenges of simulating and modelling turbomachinery flows and presents an overview of possible simulation strategies. A comprehensive overview is given of which particular design challenges have to date been addressed by high-fidelity simulations, with a particular focus on high-pressure and centrifugal compressors, and high-pressure and low-pressure turbines. Recommendations are provided for how quality and accuracy can be ensured for high-fidelity simulations, using direct numerical simulations of a low-pressure turbine as a case study. It is argued that industrial impact from high-fidelity simulations can be achieved in two ways, either by conducting design-of-experiment-like studies that can provide designers with insight into certain physical mechanisms and phenomena, or by helping mature and improve lower-order models. The latter is discussed with particular emphasis on recent advances in machine learning for model assessment and improvement, and the potential of one selected data-driven approach is demonstrated on predictions of wake mixing for low-pressure and high-pressure turbines.

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Section: High-pressure Compressormentioning

confidence: 97%

The Current State of High-Fidelity Simulations for Main Gas Path Turbomachinery Components and Their Industrial Impact

Sandberg

Michelassi²

2019

Flow Turbulence Combust

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“…Meshes composed mainly of hexahedral elements were developed in previous work 6 for the various test cases. A half domain mesh is used, which is justifiable by the hypothesis that a symmetric flow takes place.…”

Section: Iia Test Cases and Computational Gridsmentioning

confidence: 99%

Turbulence Model Assessment for Simulation of Shock Wave-Boundary Layer Interaction Flows

Vieira

Azevedo

2013

31st AIAA Applied Aerodynamics Conference

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Flows with strong shock wave-boundary layer interactions (SBLI) are present in many engineering applications. However, the accurate simulation of this type of flows is not a simple task. Work has been performed in this field, most of it employing the Reynoldsaveraged Navier-Stokes (RANS) equations, and turbulence modeling has been pointed out as one of the major issues. In this context, the present paper assess the improvements that can be achieved by the use of Reynolds-stress models (RSM) in the simulation of SBLI flows. The experimental data employed for comparison purposes are those released by the 2010 AIAA SBLI Workshop for some 3-D SBLI flows. The present computational simulations use different turbulence models, but the current focus is on the study of the modified Craft-Launder Reynolds stress model.

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An Investigation of the Role of an Upstream Burst Diaphragm on Flow Quality within a Ludwieg Tube using RANS

Lindörfer

Anusonti-Inthra

Combs

et al. 2016

46th AIAA Fluid Dynamics Conference

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RANS Simulations of Flows with Shock Wave-Boundary Layer Interaction

Cited by 5 publications

References 13 publications

The Current State of High-Fidelity Simulations for Main Gas Path Turbomachinery Components and Their Industrial Impact

The Current State of High-Fidelity Simulations for Main Gas Path Turbomachinery Components and Their Industrial Impact

Turbulence Model Assessment for Simulation of Shock Wave-Boundary Layer Interaction Flows

An Investigation of the Role of an Upstream Burst Diaphragm on Flow Quality within a Ludwieg Tube using RANS

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