Effects of ingestion on the flow and heat transfer in a rotor-stator system

Le Wang, M A Wilson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Abstract

Ingestion (or ingress) of hot mainstream gas into the wheel-spaces between the rotor and stator discs in the high pressure stages of gas turbines is one of the most important internal cooling problems for engine designers. A rim seal at the periphery of the wheel-space and a radial outflow of sealing air are used to reduce or prevent this
damaging ingestion. The sealing air is also used for rotor disc cooling. In this paper, a simplified axisymmetric computational fluid dynamics (CFD) model of a gas turbine rotor-stator wheel-space is used to predict the effects of ingress on the flow and heat transfer. The steady flow computations are carried out using the CFD code ANSYS/CFX and the shear stress transport (SST) turbulence model. The rotational Reynolds number, inlet flow rates and thermal boundary settings are selected to represent the operating conditions of an ingress experimental rig, and comparisons are made between computations and measurements of heat transfer in the wheel-space. The computed heat transfer from the steady model (in terms of values of local Nusselt number on
the rotor) is in broad agreement with measurements obtained using thermochromic liquid crystal in a transient experiment. Alternative wall-surface thermal boundary conditions are investigated in order to study the sensitivity of computed Nusselt numbers to these modelling assumptions.
Original languageEnglish
Title of host publicationProceedings of the 15th International Heat Transfer Conference, IHTC-15
Publication statusPublished - 2014
Event15th International Heat Transfer Conference, IHTC-15 - Kyoto, Japan
Duration: 10 Aug 201415 Aug 2014

Conference

Conference15th International Heat Transfer Conference, IHTC-15
CountryJapan
CityKyoto
Period10/08/1415/08/14

Fingerprint

Ingestion (engines)
Stators
Wheels
Rotors
Heat transfer
Nusselt number
Gas turbines
Computational fluid dynamics
Cooling
Inlet flow
Steady flow
Air
Turbulence models
Liquid crystals
Seals
Shear stress
Dynamic models
Reynolds number
Flow rate
Boundary conditions

Cite this

Wang, L., & Wilson, M. A. (2014). Effects of ingestion on the flow and heat transfer in a rotor-stator system. In Proceedings of the 15th International Heat Transfer Conference, IHTC-15 [IHTC15-8457]

Effects of ingestion on the flow and heat transfer in a rotor-stator system. / Wang, Le; Wilson, M A.

Proceedings of the 15th International Heat Transfer Conference, IHTC-15. 2014. IHTC15-8457.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Wang, L & Wilson, MA 2014, Effects of ingestion on the flow and heat transfer in a rotor-stator system. in Proceedings of the 15th International Heat Transfer Conference, IHTC-15., IHTC15-8457, 15th International Heat Transfer Conference, IHTC-15, Kyoto, Japan, 10/08/14.
Wang L, Wilson MA. Effects of ingestion on the flow and heat transfer in a rotor-stator system. In Proceedings of the 15th International Heat Transfer Conference, IHTC-15. 2014. IHTC15-8457
Wang, Le ; Wilson, M A. / Effects of ingestion on the flow and heat transfer in a rotor-stator system. Proceedings of the 15th International Heat Transfer Conference, IHTC-15. 2014.
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