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TECHNICAL PAPERS

A Review of Purge Air Designs for Aeroengine-Based Optical Pyrometers

[+] Author and Article Information
Clive I. Kerr, Paul C. Ivey

School of Mechanical Engineering, Cranfield University, Cranfield MK43 0AL, United Kingdom

J. Turbomach 124(2), 227-234 (Apr 09, 2002) (8 pages) doi:10.1115/1.1458578 History: Received October 12, 2000; Online April 09, 2002
Copyright © 2002 by ASME
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References

De Lucia,  M., and Lanfranchi,  C., 1994, “An Infrared Pyrometry System for Monitoring Gas Turbine Blades: Development of a Computer Model and Experimental Results,” ASME J. Eng. Gas Turbines Power, 116, pp. 172–177.
Sellers, R. R., Przirembel, H. R., Clevenger, D. H., and Lang, J. L., 1989, “The Use of Optical Pyrometers in Axial Flow Turbines,” AIAA/ASME/SAE/ASEE 25th Joint Propulsion Conference, Monterey, July 10–12, AIAA-89-2692.
Kirby, P. J., 1986, “Some Considerations Relating to Aero Engine Pyrometry,” Advance Instrumentation for Aero Engine Components, The Propulsion and Energetics Panel 67th Symposium, Philadelphia, May 19–23, 1986. AGARD-CP-399.
Davinson, I., 1984, “Detection of and Correction for Lens Contamination in Radiation Pyrometers, EIR 00862. Rolls-Royce Limited, Derby, England.
Atkinson, W. H., and Guenard, R. N., 1978 “Turbine Pyrometry in Aircraft Engines,” IEEE/ERA Electro-78 Conference Record Session 33/3, Boston, MA, May 23–25.
Barber, R., 1969, “A Radiation Pyrometer Designed for Inflight Measurement of Turbine Blade Temperatures,” National Air Transportation Meeting, New York, NY, April 21–24, SAE 690432.
Berenblut,  B. J., and Masom,  R. A., 1982, “Radiation Pyrometry for Gas Turbine Engines—An Introduction,” Br. J. Non-Destr. Test., 24(5), 268–269.
Hayden, T., Myhre, D., Pui, D. Y. H., Kuehn, T. H., and Tsai, C. J., 1988, “Evaluating Lens Purge Systems for Optical Sensors on Turbine Engines,” AIAA/ASME/SAE/ASEE 24th Joint Propulsion Conference, Boston, MA, July 11–13, AIAA-88-3037.
Myhre, D. C., Pui, D. Y. H., and Miller, L. V., 1988, “Purge Air System for a Combustion Instrument,” Rosemount, US 4,786,188.
O’Brien, R. J., and Myhre, D. C., 1989, “Asymmetric Purge Air System for Cleaning a Lens,” Rosemount, US 4,836,689.
Holmqvist, G., Kallon, S., and Jansson, B., 1980, “Protective Device for Optical Elements,” AGA Aktiebolag, US 4,240,691.
De La Mora,  J. F., Rao,  N., and McMurry,  P. H., 1990, “Inertial Impaction of Fine Particles at Moderate Reynolds Numbers and in the Transonic Regime With a Thin-Plate Orifice Nozzle,” J. Aerosol Sci., 21(7), pp. 889–909.
Biswas,  P., and Flagan,  R. C., 1988, “The Particle Trap Impactor,” J. Aerosol Sci., 19(1), pp. 113–121.
MacKay, C. G., 1990, “Temperature Measurement in Turbine Engines,” Allied-Signal Inc, US 4,934,137.
Penney, C. M., and Lund, R. M., 1988, “System to Protect Optics Against Dirty Environments,” General Electric Company, US 4,784,491.
Craft, D. W., 1988, “Pyrometer Vortex Purge Air Cleaning System With Center Masked Pyrometer Lens,” General Electric Company, US 4,738,528.
Myhre, D. C., O’Brien, R. J., Pui, D. Y. H., and Tsai, C. J., 1992, “Window Purging System for a Combustion Instrument,” Rosemount, US 5,146,244.
Harley, J. F., 1981, “Air Purging for an Optical Pyrometer of a Gas Turbine Engine,” Avcu Corporation, US 4,306,835.
Pointer, J., and Masom, R. A., 1985, “Radiation Pyrometer,” Smiths Industries Public Limited Company, GB 2,158,576.
Ridley, I. H., and Fearnehough, P., 1997, “Purge Assembly,” Land Instruments International Limited, US 5,599,105.
Kast, H. B., and Prasad, M. E., 1995, “Pyrometer Adapter,” General Electric Company, US 5,421,652.
Suarez-Gonzalez, E., and Kepple, D. A., 1987, “In-flight Engine Control Optical Pyrometer,” United Technologies Corporation, US 4,657,386.

Figures

Grahic Jump Location
Fundamental purge design
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Air scrubbing configuration
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Air curtain configuration
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Still tube configuration
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Air scrubbing via flow tube (US 4,786,188)
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Flow tube inlet arrangement (US 4,786,188)
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Air scrubbing via protruding lip (US 4,240,691)
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Use of inertial separation (US 4,786,188)
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180 deg inertial separator (US 4,786,188)
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Air swirl component (US 4,934,137)
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Swirl system via gas nozzle (US 4,784,491)
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Vortex purge system (US 4,738,528)
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Swirling vortex (US 4,738,528)
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Flow tube inlet arrangement for asymmetrical scrubbing (US 4,836,689)
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Annular slotted flow tube (US 5,146,244)
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Primary airflow through slotted flow tube (US 5,146,244)
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Tapered flow tube (US 5,146,244)
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Purge inlet arrangement for fluid screen (US 4,306,835)
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Fluid screen (US 4,306,835)
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Still tube system (GB 2,158,576)
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Swirl reducing system via vanes (US 5,599,105)
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Swirl reducing system via diffusers (US 5,421,652)
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Sight tube lip (US 4,306,835)
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Beveled sight tube aperture (US 4,934,137)
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Optical shutter (US 4,657,386)

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