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Implementation of non-intrusive jet exhaust species distribution measurements within a test facility

Implementation of non-intrusive jet exhaust species distribution measurements within a test facility
Implementation of non-intrusive jet exhaust species distribution measurements within a test facility
We report on the installation and commissioning of two systems for the measurement of cross-sectional distributions of pollutant species in jet exhaust, within the engine ground test facility at INTA, Madrid. These systems use optical tomography techniques to estimate the cross-sectional distributions of CO2 and soot immediately behind the engine. The systems are designed to accommodate the largest civil aviation engines currently in service, without obstruction of the exhaust or bypass flows and with negligible effect upon the entrained flow behavior. We describe the physical construction and installation status of each system. In the case of the CO2 system, we examine the challenges of achieving the structural rigidity necessary for adequate suppression of pointing error within 126 laser-based transmittance measurements, each utilizing a 7 m overall path length. We describe methods developed for efficient implementation of co-planarity and 4-degree-of-freedom alignment of individual paths within this beam array. We also present laboratory performance data for three alternative optical designs that differ in their approach to the management of pointing error and turbulence-induced beam wander and spread. The FLITES soot monitoring capability is based on laser induced incandescence (LII) and uses a short-pulse fiber laser and two CCD cameras, in an autoprojection arrangement. We describe the measurement geometry currently being implemented in the test cell and discuss optical design issues, including once again the effect of the plume itself.
Wright, P.
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McCormick, D.
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Kliment, J.
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Ozanyan, K.
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Tsekenis, S-A.
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Fisher, E.
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McCann, H.
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Archilla, V.
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Gonzalez-Nunez, A.
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Johnson, M.
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Black, J.
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Lengden, M.
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Wilson, D.
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Johnstone, W.
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Feng, Yutong
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Nilsson, J.
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Wright, P.
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McCormick, D.
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Kliment, J.
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Ozanyan, K.
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Tsekenis, S-A.
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Fisher, E.
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McCann, H.
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Archilla, V.
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Gonzalez-Nunez, A.
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Johnson, M.
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Black, J.
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Lengden, M.
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Wilson, D.
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Johnstone, W.
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Feng, Yutong
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Nilsson, J.
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Wright, P., McCormick, D., Kliment, J., Ozanyan, K., Tsekenis, S-A., Fisher, E., McCann, H., Archilla, V., Gonzalez-Nunez, A., Johnson, M., Black, J., Lengden, M., Wilson, D., Johnstone, W., Feng, Yutong and Nilsson, J. (2016) Implementation of non-intrusive jet exhaust species distribution measurements within a test facility. IEEE Aerospace Conference, Big Sky, Yellowstone, United States. 05 - 12 Mar 2016. (doi:10.1109/AERO.2016.7500731).

Record type: Conference or Workshop Item (Paper)

Abstract

We report on the installation and commissioning of two systems for the measurement of cross-sectional distributions of pollutant species in jet exhaust, within the engine ground test facility at INTA, Madrid. These systems use optical tomography techniques to estimate the cross-sectional distributions of CO2 and soot immediately behind the engine. The systems are designed to accommodate the largest civil aviation engines currently in service, without obstruction of the exhaust or bypass flows and with negligible effect upon the entrained flow behavior. We describe the physical construction and installation status of each system. In the case of the CO2 system, we examine the challenges of achieving the structural rigidity necessary for adequate suppression of pointing error within 126 laser-based transmittance measurements, each utilizing a 7 m overall path length. We describe methods developed for efficient implementation of co-planarity and 4-degree-of-freedom alignment of individual paths within this beam array. We also present laboratory performance data for three alternative optical designs that differ in their approach to the management of pointing error and turbulence-induced beam wander and spread. The FLITES soot monitoring capability is based on laser induced incandescence (LII) and uses a short-pulse fiber laser and two CCD cameras, in an autoprojection arrangement. We describe the measurement geometry currently being implemented in the test cell and discuss optical design issues, including once again the effect of the plume itself.

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More information

Published date: 30 June 2016
Venue - Dates: IEEE Aerospace Conference, Big Sky, Yellowstone, United States, 2016-03-05 - 2016-03-12

Identifiers

Local EPrints ID: 442573
URI: http://eprints.soton.ac.uk/id/eprint/442573
PURE UUID: d93d8ea6-cdd7-441b-993d-1810f1fd8b8f
ORCID for Yutong Feng: ORCID iD orcid.org/0000-0002-6839-2106
ORCID for J. Nilsson: ORCID iD orcid.org/0000-0003-1691-7959

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Date deposited: 20 Jul 2020 16:30
Last modified: 07 Oct 2020 08:00

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Contributors

Author: P. Wright
Author: D. McCormick
Author: J. Kliment
Author: K. Ozanyan
Author: S-A. Tsekenis
Author: E. Fisher
Author: H. McCann
Author: V. Archilla
Author: A. Gonzalez-Nunez
Author: M. Johnson
Author: J. Black
Author: M. Lengden
Author: D. Wilson
Author: W. Johnstone
Author: Yutong Feng ORCID iD
Author: J. Nilsson ORCID iD

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