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, 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
Subjects :	Mechanical Engineering Science
Divisions :	Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :	Authors Email ORCID Noor Mohamed, S UNSPECIFIED UNSPECIFIED Chew, J UNSPECIFIED UNSPECIFIED Hills, NJ UNSPECIFIED UNSPECIFIED
Date :	4 January 2017
Identification Number :	https://doi.org/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.
Related URLs :	Publisher
Depositing User :	Symplectic Elements
Date Deposited :	30 Aug 2016 14:04
Last Modified :	28 Mar 2017 11:01
URI:	http://epubs.surrey.ac.uk/id/eprint/811889

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