Interaction of shrouded stator flow and main flow and its influence on performances of a three-stage high pressure compressor

Marty, Julien; Aupoix, B.

doi:10.1177/0957650911414322

Cited by 8 publications

(4 citation statements)

References 19 publications

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“…Figure 15b shows a close-up of the middle region of the cavity. These results are in agreement with the observations of Marty et al [25] who performed similar simulations using a fully structured grid. The evolution of the residuals is shown in Figs.…”

Section: Air-breathing and Pulse Detonation Propulsionsupporting

confidence: 83%

elsA-Hybrid: an all-in-one structured/unstructured solver for the simulation of internal and external flows. Application to turbomachinery

Plata

Couaillier

Pape

et al. 2013

Progress in Propulsion Physics

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This paper reports recent work on the extension of the multiblock structured solver elsA to deal with hybrid grids. The new hybrid-grid solver is called elsA-H (elsA-Hybrid), is based on the investigation of a new unstructured-grid module has been built within the original elsA CFD (computational §uid dynamics) system. The implementation bene¦ts from the §exibility of the object-oriented design. The aim of elsA-H is to take advantage of the full potential of structured solvers and unstructured mesh generation by allowing any type of grid to be used within the same simulation process. The main challenge lies in the numerical treatment of the hybrid-grid interfaces where blocks of di¨erent type meet. In particular, one must pay attention to the transfer of information across these boundaries, so that the accuracy of the numerical scheme is preserved and §ux conservation is guaranteed. In this paper, the numerical approach allowing to achieve this is presented. A comparison between the hybrid and the structured-grid methods is also carried out by considering a fully hexahedral multiblock mesh for which a few blocks have been transformed into unstructured. The performance of elsA-H for the simulation of internal §ows will be demonstrated on a number of turbomachinery con¦gurations.

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Section: Air-breathing and Pulse Detonation Propulsionsupporting

confidence: 83%

elsA-Hybrid: an all-in-one structured/unstructured solver for the simulation of internal and external flows. Application to turbomachinery

Plata

Couaillier

Pape

et al. 2013

Progress in Propulsion Physics

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show abstract

“…16 The primary interest of using ASM is to avoid the cost and difficulties in solving the RSM, and better results have been reported for turbomachinery case where the flow has strong secondary flow and curvature. 17 However, the general experience is that these benefits are hard to realize. First, ASM equations are coupled nonlinear equations and it is nontrivial to get the root economically.…”

Section: Governing Equation and Turbulence Modelingmentioning

confidence: 99%

Improved compressor corner separation prediction using the quadratic constitutive relation

Chen

Yuan

2017

Proceedings of the Institution of Mechanical Engineers, Part A:

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This work presents the implementation and study of the quadratic constitutive relation nonlinear eddy-viscosity model with representative compressor application, for which the corner separation has been poorly predicted with the widely used linear Boussinesq eddy-viscosity model. With the introduction of the Reynolds stress anisotropy, the secondary flow of the second kind and its effect on the corner flow can be well captured and this results in greatly improved prediction of pressure coefficient, total pressure loss coefficient and the corner separation size. Without the quadratic constitutive relation model, the separation size and loss are generally over-estimated. The mechanism of the improvement is studied using both the vortex dynamics and the momentum equation. It is proved that quadratic constitutive relation model consumes low CPU time and provides much improved compressor corner separation prediction without worsening the convergence property.

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“…On the total temperature distribution, all of the calculations overestimate the casing wall temperature. The purpose of this work is not to attempt to explain discrepancies between CFD and experiments, which is always a difficult task since discrepancies can be explained by many factors (unrealistic boundary conditions, geometrical details not taken into account [33], turbulence modelling, grid density, numerical errors, etc.) The important messages to deliver here are that, on this compressor configuration for the analyzed operating point, the following statements are true: 1) A very close agreement is obtained between the MFA and RC computations, in particular concerning the shapes and the levels of the radial distributions, which are well reproduced.…”

Section: Radial Distributionmentioning

confidence: 99%

Multiple-Frequency Phase-Lagged Unsteady Simulations of Experimental Axial Compressor

Castillon

Gourdain

Ottavy

2015

Journal of Propulsion and Power

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This paper presents an evaluation of the multiple-frequency phase-lagged approach, which enables the performance of unsteady Reynolds-averaged Navier-Stokes simulations on multistage turbomachinery configurations using a time-marching method. The major advantage of this approach is to reduce the computational domain to one single blade passage per row. The first part of the paper presents the method and discusses the associated assumptions and limitations. The method is then evaluated on the axial compressor configuration "Compresseur de Recherche pour l'Etude des effets Aérodynamiques et TEchnologiques" investigated experimentally at Laboratory of Fluid Mechanics and Acoustics. The computational fluid dynamics results are analyzed and compared both with experimental data and with a reference multipassage computation based on a sliding mesh approach. These comparisons enable the highlighting of the interests of this approach but also the underlining of its limits. The multiple-frequency phase-lagged approach enables the simulation of unsteady effects on a multistage turbomachinery and access to unsteady information that would not be available with a mixing-plane approach. However, if the method is capable of capturing unsteady effects linked to the adjacent upstream and downstream blade rows passing frequency, it fails modeling clocking effects, i.e., the relative influence between rows N and N 2.

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Interaction of shrouded stator flow and main flow and its influence on performances of a three-stage high pressure compressor

Cited by 8 publications

References 19 publications

elsA-Hybrid: an all-in-one structured/unstructured solver for the simulation of internal and external flows. Application to turbomachinery

elsA-Hybrid: an all-in-one structured/unstructured solver for the simulation of internal and external flows. Application to turbomachinery

Improved compressor corner separation prediction using the quadratic constitutive relation

Multiple-Frequency Phase-Lagged Unsteady Simulations of Experimental Axial Compressor

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