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Effect of bolts on flow and heat transfer in a rotor-stator disc cavity

Noor Mohamed, S, Chew, J and Hills, NJ (2017) Effect of bolts on flow and heat transfer in a rotor-stator disc cavity ASME Journal of Engineering for Gas Turbines and Power.

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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
Subjects : Mechanical Engineering Science
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
AuthorsEmailORCID
Noor Mohamed, SUNSPECIFIEDUNSPECIFIED
Chew, JUNSPECIFIEDUNSPECIFIED
Hills, NJUNSPECIFIEDUNSPECIFIED
Date : 1 March 2017
Identification Number : 10.1115/GT2016-56470
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.
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 30 Aug 2016 14:04
Last Modified : 30 Nov 2016 15:17
URI: http://epubs.surrey.ac.uk/id/eprint/811889

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