Scholarships Info

PhD Studentship
Modelling of ThermoAcoustic Instabilities
University of Cambridge – Department of Engineering

Limit of tenure: 3 years

Lean premixed combustion are identified to be a potential candidate for
environmentally friendly gas turbines. Because of the inherent instability
issues in lean combustion, the use of partial premixing strategies is inevitable
and is commonly used in industrial gas turbines to have smooth operating
characteristics. The occurrence of combustion oscillations leading to
thermoacoustic instabilities is also inevitable in large industrial gas turbine
and these instabilities come into light at an advanced stage of new engine
development programmes. Hence altering combustor design will be very expensive
and these instabilities are usually controlled using sophisticated open or
closed loop control strategies built based on experience. Thus, there is an
attractive incentive to develop reliable methodologies and tools to predict
combustion instabilities since there is a substantial economic gain in using
reliable predictive tools in new engine development. This project is a first
step towards this goal.

The main aim of the project is to simulate the thermoacoustic instabilities of
lean premixed and partially premixed flames using the latest combustion models
developed in the past few years at Cambridge University Engineering Department
for turbulent premixed and partially premixed combustion. It is expected that
one of the commercial CFD tools along with the CUED combustion submodels will be
used to simulate turbulent combustion. These CFD results are to be analysed to
obtain flame transfer functions which will be used in subsequent thermoacoustic
simulations using loworder modelling methods. There is also a scope for
developing a new modelling approach. These predictions are to be compared with
published results on thermoacoustics and this project involves collaboration
with Mitsubishi Heavy Industries, Japan.

The successful candidate will have a first class, at least 2:1 or equivalent,
postgraduate degree in Mechanical/Aerospace/engineering or any other relevant
fields. A strong background in fluid dynamics, combustion, numerical methods and
good analytical skills are desirable. Application from overseas student is
welcome. Funding, covering all expenses, is available for three year doctoral
study in thermoacoustic instability modelling and computations at Cambridge
University Engineering Department. This studentship will commence from October
2010 or as soon as possible thereafter, but it should be before January 2011

Further details on this project may be obtained from Dr N. Swaminathan
(ns341@…). An application form for PhD study at Cambridge University can
be obtained from the Board of Graduate Studies. On line applications must be
submitted but 16 July 2010. Paper applications must be submitted by 31 July
2010. More information on the graduate studies at CUED is available here
http://www.eng.cam.ac.uk/graduate/postgrad/ . If you submit your application
online via BoGS website, send a copy in pdf format to Dr N. Swaminathan
(ns341@…) before 31stst July 2010

Quote Reference: NA06893, Closing Date: 31 July 2010

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