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

Paul Wright*, David McCormick, Joshua Kliment, Krikor Ozanyan, Mark Johnson, John Black, Stylianos Alexios Tsekenis, Edward Fisher, Hugh McCann, Michael Lengden, David Wilson, Walter Johnstone, Victor Archilla, Álvaro González-Núñez, Yutong Feng, Johan Nilsson

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution


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.

Original languageEnglish
Title of host publication2016 IEEE Aerospace Conference, AERO 2016
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages14
ISBN (Electronic)9781467376761
Publication statusPublished - 30 Jun 2016
Event2016 IEEE Aerospace Conference, AERO 2016 - Big Sky, United States
Duration: 5 Mar 201612 Mar 2016

Publication series

NameIEEE Aerospace Conference Proceedings
ISSN (Print)1095-323X


Conference2016 IEEE Aerospace Conference, AERO 2016
Country/TerritoryUnited States
CityBig Sky




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