| EPSRC Reference: |
GR/M21652/01 |
| Title: |
INVESTIGATION OF LOW ENGINE-ORDER EXCITATION MECHANISMS FOR TURBINE BLADES |
| Principal Investigator: |
Imregun, Professor M |
| Other Investigators: |
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| Project Partners: |
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| Department: |
Mechanical Engineering |
| Organisation: |
Imperial College London |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 January 1999 |
Ends: |
31 December 2001 |
Value (£): |
140,580
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| EPSRC Research Topic Classifications: |
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| EPSRC Industrial Sector Classifications: |
| Aerospace, Defence and Marine |
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Summary on Grant Application Form |
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The proposed research aims at understanding the excitation mechanism of low engine-order forced response in turbomachinery. There are no current prediction methodologies but experimental evidence indicates the following controlling parameters: non-uniform stator blade spacing, flow exit angle, rotor/stator axial gap, general unsteadiness through the engine, density variations due to combustion effects, blade numbers through several stages and burner blockages. The work will determine the rank the parameters that influence the strength of the unsteady forcing so that it can be minimised. An existing aeroelasticity code incorporating sliding planes and flexible blades will be used to create a multi-stage multi-passage representation of the turbine assembly and all relevant engineering features will be incorporated into the numerical model. The test cases will be selected jointly with Rolls-Royce personnel who will remain closely involved throughout the project. Design rules for minimum response will be defined by investigating the sensitivity of forced response to controlling parameters. Both inviscid plus loss model and viscous flow representations will be used for non-linear unsteady aerodynamics and such an analysis will be the first one of its kind. The work will be carried out by a postdoctoral research assistant who will make extensive use of EPSRC super-computing facilities.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.imperial.ac.uk |