contributor author | Gao, Feng | |
contributor author | Chew, John W. | |
date accessioned | 2022-05-08T09:20:40Z | |
date available | 2022-05-08T09:20:40Z | |
date copyright | 2/21/2022 12:00:00 AM | |
date issued | 2022 | |
identifier issn | 0742-4795 | |
identifier other | gtp_144_05_051010.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4285020 | |
description abstract | This paper presents a systematic study of flow and heat transfer mechanisms in a compressor disk cavity with an axial throughflow under centrifugal buoyancy-driven convection, comparing with previously published experimental data. Wall-modeled large-eddy simulations (WMLES) are conducted for six operating conditions, covering a range of rotational Reynolds number (3.2×105−2.2×106), buoyancy parameter (0.11–0.26), and Rossby number (0.4–0.8). Numerical accuracy and computational efficiency of the simulations are considered. Wall heat transfer predictions are compared with measured data with a good level of agreement. A constant rothalpy core occurs at high Eckert number, appearing to reduce the driving buoyancy force. The flow in the cavity is turbulent with unsteady laminar Ekman layers observed on both disks except in the bore flow affected region on the downstream disk cob. The shroud heat transfer Nusselt number–Rayleigh number scaling agrees with that of natural convection under gravity for high Rayleigh numbers. Disk heat transfer is dominated by conduction across unsteady Ekman layers, except on the downstream disk cob. The disk bore heat transfer is close to a pipe flow forced convection correlation. The unsteady flow structure is investigated showing strong unsteadiness in the cavity that extends into the axial throughflow. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Flow and Heat Transfer Mechanisms in a Rotating Compressor Cavity Under Centrifugal Buoyancy-Driven Convection | |
type | Journal Paper | |
journal volume | 144 | |
journal issue | 5 | |
journal title | Journal of Engineering for Gas Turbines and Power | |
identifier doi | 10.1115/1.4052649 | |
journal fristpage | 51010-1 | |
journal lastpage | 51010-11 | |
page | 11 | |
tree | Journal of Engineering for Gas Turbines and Power:;2022:;volume( 144 ):;issue: 005 | |
contenttype | Fulltext | |