contributor author | Pitz, Diogo B. | |
contributor author | Chew, John W. | |
contributor author | Marxen, Olaf | |
contributor author | Hills, Nicholas J. | |
date accessioned | 2017-11-25T07:15:56Z | |
date available | 2017-11-25T07:15:56Z | |
date copyright | 2017/14/2 | |
date issued | 2017 | |
identifier issn | 0742-4795 | |
identifier other | gtp_139_07_072602.pdf | |
identifier uri | http://138.201.223.254:8080/yetl1/handle/yetl/4233744 | |
description abstract | A high-order numerical method is employed to investigate flow in a rotor/stator cavity without heat transfer and buoyant flow in a rotor/rotor cavity. The numerical tool used employs a spectral element discretization in two dimensions and a Fourier expansion in the remaining direction, which is periodic and corresponds to the azimuthal coordinate in cylindrical coordinates. The spectral element approximation uses a Galerkin method to discretize the governing equations, but employs high-order polynomials within each element to obtain spectral accuracy. A second-order, semi-implicit, stiffly stable algorithm is used for the time discretization. Numerical results obtained for the rotor/stator cavity compare favorably with experimental results for Reynolds numbers up to Re1 = 106 in terms of velocities and Reynolds stresses. The buoyancy-driven flow is simulated using the Boussinesq approximation. Predictions are compared with previous computational and experimental results. Analysis of the present results shows close correspondence to natural convection in a gravitational field and consistency with experimentally observed flow structures in a water-filled rotating annulus. Predicted mean heat transfer levels are higher than the available measurements for an air-filled rotating annulus, but in agreement with correlations for natural convection under gravity. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Direct Numerical Simulation of Rotating Cavity Flows Using a Spectral Element-Fourier Method | |
type | Journal Paper | |
journal volume | 139 | |
journal issue | 7 | |
journal title | Journal of Engineering for Gas Turbines and Power | |
identifier doi | 10.1115/1.4035593 | |
journal fristpage | 72602 | |
journal lastpage | 072602-10 | |
tree | Journal of Engineering for Gas Turbines and Power:;2017:;volume( 139 ):;issue: 007 | |
contenttype | Fulltext | |