Effect of bolts on flow and heat transfer in a rotor-stator disc cavity
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Noor Mohamed, Sulfickerali, Chew, John and Hills, Nicholas (2017) Effect of bolts on flow and heat transfer in a rotor-stator disc cavity ASME Journal of Engineering for Gas Turbines and Power, 139 (5), 051901.
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Abstract
Previous studies have indicated some differences between steady CFD predictions of flow in a rotor-stator disc cavity with rotating bolts compared to measurements. Recently time-dependent CFD simulations have revealed the unsteadiness present in the flow and have given improved agreement with measurements. In this paper unsteady Reynolds averaged Navier-Stokes (URANS) 3600 model CFD calculations of a rotorstator cavity with rotor bolts were performed in order to better understand the flow and heat transfer within a disc cavity previously studied experimentally by other workers. It is shown that the rotating bolts generate unsteadiness due to wake shedding which creates time-dependent flow patterns within the cavity. At low throughflow conditions, the unsteady flow significantly increases the average disc temperature. A systematic parametric study is presented giving insight into the influence of number of bolts, mass flow rate, cavity gap ratio and the bolts-to-shroud gap ratio on the time depended flow within the cavity.
| Item Type: | Article | ||||||||||||
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| Subjects : | Mechanical Engineering Science | ||||||||||||
| Divisions : | Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences | ||||||||||||
| Authors : |
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| Date : | 4 January 2017 | ||||||||||||
| Identification Number : | 10.1115/1.4035144 | ||||||||||||
| Copyright Disclaimer : | Copyright 2016 American Society of Mechanical Engineers | ||||||||||||
| Uncontrolled Keywords : | Gas turbine, internal air systems, unsteady flow, heat transfer, URANS, aero-engine, rotorstator disc cavity, bolts. | ||||||||||||
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| Depositing User : | Symplectic Elements | ||||||||||||
| Date Deposited : | 30 Aug 2016 14:04 | ||||||||||||
| Last Modified : | 04 Jan 2018 02:08 | ||||||||||||
| URI: | http://epubs.surrey.ac.uk/id/eprint/811889 |
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