PhD studentship: Experimental measurements of ingress and heat transfer in gas turbines

University of Bath - Mechanical Engineering,

Supervisor name: Dr James Scobie

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Research Centre: Turbomachinery Research Centre

The Turbomachinery Research Centre (TRC) at the University of Bath is seeking a PhD candidate for an experimental project investigating ingress and heat transfer in gas turbines. Ingress occurs when hot gas from the mainstream gas path is ingested into the wheel-space between the turbine disc and its adjacent casing. Rim seals are fitted at the periphery of the system, and a sealing flow of coolant is used to reduce or prevent ingress. However, too much sealing air reduces the engine efficiency, and too little can cause serious overheating, resulting in damage to the turbine rim and blade roots.

The TRC has investigated the effects of ingress experimentally, theoretically and computationally over the last 11 years. This research has taken place in collaboration with Siemens across two highly successful projects jointly funded by the EPSRC. Both of these projects involved the design and manufacture of fully-instrumented rotating disc rigs used to study the effects of ingress in engine-representative gas-turbine wheel-spaces. In parallel with the experimental programmes, theoretical models developed at Bath have been used extensively in the analysis and interpretation of the measured data obtained from the rigs.

The proposed project will, for the first time, apply new analysis methods and improved measurement technique capability to heat transfer tests on turbine discs. The PhD student would be expected to assist a postdoctoral research associate in the design, construction and commissioning of the test rig, and take a leading role in conducting the experimental measurements. Temperature measurements on the rotating disc surfaces will be used to determine the adiabatic effectiveness and heat transfer coefficients in the presence of ingress. The successful completion and implementation of this research through improved engine design should result in a competitive advantage for Siemens.

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Please tick how you intend for this project to be funded

This is a CASE studentship from Siemens. The funding will cover:
- Home/EU tuition fees
- £1,000 per year TSF
- annual stipend £14,296 (2016-7 rate)

Only applicants with a Home fee status, or EU nationals residing in the UK are eligible for this funding.

Applications will remain open for this project until a suitable candidate is found.

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South West England