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Article

Reynolds Sensitivity of the Wake Passing Effect on a LPT Cascade Using Spectral/hp Element Methods †

1
Department of Aeronautics, Imperial College London, London SW7 2AZ, UK
2
School of Aeronautical and Space Engineering, Universidad Politécnica de Madrid, 28040 Madrid, Spain
3
Rolls-Royce Deutschland, 15827 Dahlewitz, Germany
4
Rolls-Royce plc., Derby DE24 8ZF, UK
*
Author to whom correspondence should be addressed.
This paper is an extended version of our paper published in Proceedings of the European Turbomachinery Conference ETC14 2021, Paper No. 606, Gdansk, Poland, 12–16 April 2021.
Academic Editor: Tony Arts
Int. J. Turbomach. Propuls. Power 2022, 7(1), 8; https://doi.org/10.3390/ijtpp7010008
Received: 20 June 2021 / Revised: 19 September 2021 / Accepted: 7 February 2022 / Published: 22 February 2022
Reynolds-Averaged Navier–Stokes (RANS) methods continue to be the backbone of CFD-based design; however, the recent development of high-order unstructured solvers and meshing algorithms, combined with the lowering cost of HPC infrastructures, has the potential to allow for the introduction of high-fidelity simulations in the design loop, taking the role of a virtual wind tunnel. Extensive validation and verification is required over a broad design space. This is challenging for a number of reasons, including the range of operating conditions, the complexity of industrial geometries and their relative motion. A representative industrial low pressure turbine (LPT) cascade subject to wake passing interactions is analysed, adopting the incompressible Navier–Stokes solver implemented in the spectral/hp element framework Nektar++. The bar passing effect is modelled by leveraging a spectral-element/Fourier Smoothed Profile Method. The Reynolds sensitivity is analysed, focusing in detail on the dynamics of the separation bubble on the suction surface as well as the mean flow properties, wake profiles and loss estimations. The main findings are compared with experimental data, showing agreement in the prediction of wake traverses and losses across the entire range of flow regimes, the latter within 5% of the experimental measurements. View Full-Text
Keywords: wake-passing effect; reynolds sensitivity; spectral/hp element method; high-order; smoothed profile method wake-passing effect; reynolds sensitivity; spectral/hp element method; high-order; smoothed profile method
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MDPI and ACS Style

Cassinelli, A.; Mateo Gabín, A.; Montomoli, F.; Adami, P.; Vázquez Díaz, R.; Sherwin, S.J. Reynolds Sensitivity of the Wake Passing Effect on a LPT Cascade Using Spectral/hp Element Methods. Int. J. Turbomach. Propuls. Power 2022, 7, 8. https://doi.org/10.3390/ijtpp7010008

AMA Style

Cassinelli A, Mateo Gabín A, Montomoli F, Adami P, Vázquez Díaz R, Sherwin SJ. Reynolds Sensitivity of the Wake Passing Effect on a LPT Cascade Using Spectral/hp Element Methods. International Journal of Turbomachinery, Propulsion and Power. 2022; 7(1):8. https://doi.org/10.3390/ijtpp7010008

Chicago/Turabian Style

Cassinelli, Andrea, Andrés Mateo Gabín, Francesco Montomoli, Paolo Adami, Raul Vázquez Díaz, and Spencer J. Sherwin. 2022. "Reynolds Sensitivity of the Wake Passing Effect on a LPT Cascade Using Spectral/hp Element Methods" International Journal of Turbomachinery, Propulsion and Power 7, no. 1: 8. https://doi.org/10.3390/ijtpp7010008

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