Experimental and computational investigation of flow structure of buoyancy induced flow in heated rotating cavities

Fazeli, Seyed Mostafa, Kanjirakkad, Vasudevan and Long, Christopher (2020) Experimental and computational investigation of flow structure of buoyancy induced flow in heated rotating cavities. GPPS Chania20, Online conference, 7-9 September 2020. Published in: Proceedings of Global Power and Propulsion Society. 1-14. GPPS ISSN 2504-4400

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Abstract

This paper presents Laser-Doppler Anemometry (LDA) measurements obtained from the Sussex Multiple Cavity test facility. This facility comprises a number of heated disc cavities with a cool bore flow and is intended to emulate the secondary air system flow in an H.P compressor. Measurements were made of the axial and tangential components of velocity over the respective range of Rossby, Rotational and Axial Reynolds numbers, (Ro, Reθ and Rez), 0.32 < Ro < 1.28, Reθ = 7.1 × 105, 1.2 × 104 < Rez < 4.8 × 104 and for the values of the buoyancy parameter (βΔT) : 0.50 < βΔT < 0.58. The frequency spectra analysis of the tangential velocity indicates the existence of pairs of vortices inside the cavities. The swirl number, Xk, calculated from these measurements show that the cavity fluid approaches solid body rotation near the shroud region. The paper also presents results from Unsteady Reynolds-Averaged Navier-Stokes (URANS) calculations for the test case where Ro = 0.64. The time-averaged LDA data and numerical results show encouraging agreement.

Item Type: Conference Proceedings
Keywords: Rotating Cavity, Compressor Disc, Buoyancy, LDA
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Research Centres and Groups: Thermo-Fluid Mechanics Research Centre
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ0266 Turbines. Turbomachines (General)
Depositing User: Vasudevan Kanjirakkad
Date Deposited: 28 Sep 2020 12:17
Last Modified: 30 Oct 2020 15:19
URI: http://sro.sussex.ac.uk/id/eprint/93980

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