| EPSRC Reference: |
GR/R63691/01 |
| Title: |
JREI: An Optical Diagnostic for making Turbulence Measurements in High Speed Airflows. |
| Principal Investigator: |
Bryanston-Cross, Professor P |
| Other Investigators: |
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| Department: |
Sch of Engineering |
| Organisation: |
University of Warwick |
| Scheme: |
JREI |
| Starts: |
17 January 2002 |
Ends: |
16 January 2004 |
Value (£): |
47,220
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| EPSRC Research Topic Classifications: |
| Aerodynamics |
Fluid Dynamics |
| Instrumentation Eng. & Dev. |
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| EPSRC Industrial Sector Classifications: |
| Aerospace, Defence and Marine |
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| Panel History: |
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Summary on Grant Application Form |
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THE OPTICAL MEASUREMENT OF COHERENT MIXING WITHIN THE TRANSONIC EXHAUST PLUME OF A GAS TURBINE ENGINE.It is proposed to create a 5 pulse Nd/Yag laser system to capture multiple overlapping images onto a series of CCD (Charge Coupled Device) cameras. Each laser pulse, separated from the next by 3lOps, produces a single image of the particulate distribution within the seeded supersonic exhaust plume from a gas turbine engine. Image intensifiers in front of each camera amplify the images and act as fast shutters. The images are combined in pairs forming PIV (particle Image Velocimetry) measurements of the jet. Five sequentially captured images will track and measure the coherent mixing structure within the plume. The accuracy of the velocity measurement 4%. To date the single 2 frame PIV images made provide instantaneous measurements, but fail to map the evolution of large-scale structures. The approach has been researched low speed by the OEL (Optical Engineering Laboratories), but no high speed measurement has been made. However, in all power generation turbomachinery the airflow passes through the blade-rows at transonic speeds. The ability to measure large coherent structures will significantly help the understanding of flow unsteadiness needed to increase efficiency and performance. A more complete understanding of the mixing process will also lead to a reduction in jet noise.
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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.warwick.ac.uk |