Overview
A PhD studentship is available in the Aerodynamics & Flight Mechanics research group, which fully covers University tuition fees (at EU/UK level**) and provides a tax-free bursary of £13,600 per year, rising annually (each October) in line with the UK Government (EPSRC) recommended rate, for a 3-year duration. **EU/UK fees £3500 p.a., Overseas fee £15,500 pa (figures to be confirmed, and subject to annual increase). There is NO additional funding available for overseas fees. We regret it will not be possible to consider your application unless you can provide funding from other sources to pay the fees difference (£12,000 for 2010/11).
Project description:
With noise regulations at airports becoming increasingly stringent, research in aerodynamic sound generation is gaining significance. Although considerable research on jet noise has been carried out over the last decades, with significant results obtained in Southampton, open questions remain about noise generation mechanisms and noise reduction in jet flows.
Therefore, the sound generation of subsonic axisymmetric jets will be investigated with numerical simulations. Specifically, the focus will lie on the sound generation of both single-stream and co-axial jets, including a significant part of the nozzle in the simulations.
Objective of the research
The main objective of the proposed research is to gain an understanding of the physical mechanisms of coherent structure and sound generation in these axisymmetric flows. A detailed understanding of the structure and noise generation mechanisms will provide the basis for using passive or active flow control measures aimed at exploiting hydrodynamic instabilities to alter the flow and achieve a noise reduction.
The primary research tool will be an in-house compressible Navier-Stokes solver currently used for direct numerical simulations (DNS) of axisymmetric flows on UK national supercomputers, running on thousands of computing cores. In order to reduce the computational cost, which is a prerequisite for conducting parametric studies of flow control devices, a large-eddy-simulation (LES) capability will need to be implemented into the existing code.
Once the LES approach has been successfully validated against existing DNS data for jet flows, LES will be conducted of the abovementioned cases and coupled to acoustic analogies in order to obtain farfield noise predictions used to assess the effectiveness of the flow control measures. SES has an international reputation for research excellence, and is a diverse community committed to creating an inclusive working and learning environment in which all individuals are equally treated and valued, and can achieve their potential. All studentship applications are considered in relation to academic criteria, regardless of the individual's race, nationality, gender, or belief.
Application Requirements
Entry requirements: Candidates will have a first or upper second class degree (or equivalent) in relevant disciplines, e.g. aeronautical/mechanical engineering, applied mathematics, physics. Because the project requires modifications to a research code, knowledge of FORTRAN and parallel computing will be an advantage.
Commencing on 1 October 2010.
Application Deadline:
A rolling deadline applies If you wish to discuss any details of the project informally, please contact Dr Richard Sandberg, AFM research group, Email: sandberg@soton.ac.uk, Tel: +44 (0) 2380 593058 +44 (0) 2380 593058.
How to apply: http://www.soton.ac.uk/ses/courses/pg/pgapply.html
Please read the notes carefully.
Applications will only be considered on receipt of a completed application form. Please include a personal statement in your application, stating why you particularly want to do a PhD, why you think you are suited to a research degree and what particularly attracts you to this project.
Please kindly mention Scholarization.blogspot.com when applying for this opportunity
A PhD studentship is available in the Aerodynamics & Flight Mechanics research group, which fully covers University tuition fees (at EU/UK level**) and provides a tax-free bursary of £13,600 per year, rising annually (each October) in line with the UK Government (EPSRC) recommended rate, for a 3-year duration. **EU/UK fees £3500 p.a., Overseas fee £15,500 pa (figures to be confirmed, and subject to annual increase). There is NO additional funding available for overseas fees. We regret it will not be possible to consider your application unless you can provide funding from other sources to pay the fees difference (£12,000 for 2010/11).
Project description:
With noise regulations at airports becoming increasingly stringent, research in aerodynamic sound generation is gaining significance. Although considerable research on jet noise has been carried out over the last decades, with significant results obtained in Southampton, open questions remain about noise generation mechanisms and noise reduction in jet flows.
Therefore, the sound generation of subsonic axisymmetric jets will be investigated with numerical simulations. Specifically, the focus will lie on the sound generation of both single-stream and co-axial jets, including a significant part of the nozzle in the simulations.
Objective of the research
The main objective of the proposed research is to gain an understanding of the physical mechanisms of coherent structure and sound generation in these axisymmetric flows. A detailed understanding of the structure and noise generation mechanisms will provide the basis for using passive or active flow control measures aimed at exploiting hydrodynamic instabilities to alter the flow and achieve a noise reduction.
The primary research tool will be an in-house compressible Navier-Stokes solver currently used for direct numerical simulations (DNS) of axisymmetric flows on UK national supercomputers, running on thousands of computing cores. In order to reduce the computational cost, which is a prerequisite for conducting parametric studies of flow control devices, a large-eddy-simulation (LES) capability will need to be implemented into the existing code.
Once the LES approach has been successfully validated against existing DNS data for jet flows, LES will be conducted of the abovementioned cases and coupled to acoustic analogies in order to obtain farfield noise predictions used to assess the effectiveness of the flow control measures. SES has an international reputation for research excellence, and is a diverse community committed to creating an inclusive working and learning environment in which all individuals are equally treated and valued, and can achieve their potential. All studentship applications are considered in relation to academic criteria, regardless of the individual's race, nationality, gender, or belief.
Application Requirements
Entry requirements: Candidates will have a first or upper second class degree (or equivalent) in relevant disciplines, e.g. aeronautical/mechanical engineering, applied mathematics, physics. Because the project requires modifications to a research code, knowledge of FORTRAN and parallel computing will be an advantage.
Commencing on 1 October 2010.
Application Deadline:
A rolling deadline applies If you wish to discuss any details of the project informally, please contact Dr Richard Sandberg, AFM research group, Email: sandberg@soton.ac.uk, Tel: +44 (0) 2380 593058 +44 (0) 2380 593058.
How to apply: http://www.soton.ac.uk/ses/courses/pg/pgapply.html
Please read the notes carefully.
Applications will only be considered on receipt of a completed application form. Please include a personal statement in your application, stating why you particularly want to do a PhD, why you think you are suited to a research degree and what particularly attracts you to this project.
Please kindly mention Scholarization.blogspot.com when applying for this opportunity
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