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PhD Studentship - Characterisation and control of tip leakage noise in ducted fans

Institute of Sound & Vibration Research

Location:  Highfield Campus
Closing Date:  Friday 30 July 2021
Reference:  1359221DA

Supervisory Team:    Chaitanya Paruchuri and Phillip Joseph

Project description

This project offers a unique opportunity to utilize advanced flow measurement techniques in order to understand the aerodynamic and aeroacoustic characteristics of tip leakage flow in ducted fans. You will join the highly motivated researchers in the Acoustics group at the Institute of sound and Vibration Research (ISVR), which is recognised as one of the world’s leading centres for the investigation of sound and vibration phenomena.

Despite more than fifty years of research into fan noise, the mechanism and understanding of the noise generated at the blade tip is still poorly understood. This is mainly because there are likely to be a number of different source mechanisms and also because the unsteady flow, and hence the sources of noise, are confined to the very small regions around the blade tip. This 3.5 year PhD project outlines an integrated, predominantly experimental work aimed at understanding and characterising more fully the mechanisms of the noise generated at the tip of a rotating fan. The studentship will be fully-funded including paid tuition fees (UK rate).

Experiments made on the ducted fan will include simultaneous measurements of the surface pressures on the blade tip (using slip-rings) and the duct wall and the hotwire measurements of the unsteady velocity in the tip region. Emphasis in this project will be on the development of signal processing strategies that allow measurements made in the duct-fixed stationary reference frame to determine the behaviour of the tip leakage flow in the reference frame rotating with the fan. Novel time – frequency analysis methods, e.g., Wigner-Ville spectral analysis will also be developed for two-point hot-wire and tested in this project. Noise reduction principles such as over tip liners and novel tip geometries will also be explored to reduce this noise source.

If you wish to discuss any details of the project informally, please contact Dr. Chaitanya Paruchuri, Acoustic Research Group, Email:, Tel: +44 (0) 2380 59 9458.

Entry Requirements

A very good undergraduate degree (at least a UK 2:1 honours degree, or its international equivalent).

Closing date: applications should be received no later than 30 July 2021 for standard admissions, but later applications may be considered depending on the funds remaining in place.

Funding: For UK students, Tuition Fees and a stipend of £15,609 tax-free per annum for up to 3.5 years. 

How To Apply

Applications should be made online. Select programme type (Research), 2021/22, Faculty of Physical Sciences and Engineering, next page select “PhD  Engineering & Environment (Full time)”. In Section 2 of the application form you should insert the name of the supervisor Chaitanya Paruchuri 

Applications should include

Curriculum Vitae

Two reference letters

Degree Transcripts to date

Apply online:

For further information please contact: 


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