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High-sensitivity in situ soot particle sensing in an aero-engine exhaust plume using long-pulsed fiber-laser-induced incandescence

High-sensitivity in situ soot particle sensing in an aero-engine exhaust plume using long-pulsed fiber-laser-induced incandescence
High-sensitivity in situ soot particle sensing in an aero-engine exhaust plume using long-pulsed fiber-laser-induced incandescence
A method to produce spatially resolved images of the distribution of absorbing particles in the exhaust plume of a modified helicopter gas turbine engine is presented. Over a small region of the plume, in situ sensing of soot particles by laserinduced incandescence (LII) is demonstrated using fiber lasers with higher power (~10 W), longer pulse duration (>100 ns), and higher pulse repetition rates (>10 kHz) than the conventional LII. The sensitivity of the method is illustrated by the detection of ambient absorbing particles in background conditions with engine at rest. With a running engine, single-beam images are obtained in 0.01 s. The feasibility of using long-pulsed fiber lasers for soot particle concentration measurement is investigated using a representative laboratory system. The time-resolved LII behavior and the measurement linearity are investigated, demonstrating the suitability of using fiber lasers for soot particle measurement for aero-engine emissions. Results for normalized soot concentration are compared with extractive measurements illustrating good correlation across a range of engine speeds. This paper is the first step toward the development of a non-intrusive system for the measurement of 2-D soot concentration in the cross section of an aero-engine exhaust plume.
1530-437X
2674-2682
McCormick, David
495459c9-df09-4783-9324-e791f7aae488
Black, John D.
27169464-03af-4c5b-9b2d-bea98781b6f2
Feng, Yutong
8257a816-5e4a-47bc-8aa2-e364c4d6e21e
Nilsson, Johan
f41d0948-4ca9-4b93-b44d-680ca0bf157b
Ozanyan, Krikor B.
c1a0d92f-feea-493c-af28-d429c623a169
McCormick, David
495459c9-df09-4783-9324-e791f7aae488
Black, John D.
27169464-03af-4c5b-9b2d-bea98781b6f2
Feng, Yutong
8257a816-5e4a-47bc-8aa2-e364c4d6e21e
Nilsson, Johan
f41d0948-4ca9-4b93-b44d-680ca0bf157b
Ozanyan, Krikor B.
c1a0d92f-feea-493c-af28-d429c623a169

McCormick, David, Black, John D., Feng, Yutong, Nilsson, Johan and Ozanyan, Krikor B. (2016) High-sensitivity in situ soot particle sensing in an aero-engine exhaust plume using long-pulsed fiber-laser-induced incandescence. IEEE Sensors Journal, 16 (8), 2674-2682. (doi:10.1109/JSEN.2015.2507702).

Record type: Article

Abstract

A method to produce spatially resolved images of the distribution of absorbing particles in the exhaust plume of a modified helicopter gas turbine engine is presented. Over a small region of the plume, in situ sensing of soot particles by laserinduced incandescence (LII) is demonstrated using fiber lasers with higher power (~10 W), longer pulse duration (>100 ns), and higher pulse repetition rates (>10 kHz) than the conventional LII. The sensitivity of the method is illustrated by the detection of ambient absorbing particles in background conditions with engine at rest. With a running engine, single-beam images are obtained in 0.01 s. The feasibility of using long-pulsed fiber lasers for soot particle concentration measurement is investigated using a representative laboratory system. The time-resolved LII behavior and the measurement linearity are investigated, demonstrating the suitability of using fiber lasers for soot particle measurement for aero-engine emissions. Results for normalized soot concentration are compared with extractive measurements illustrating good correlation across a range of engine speeds. This paper is the first step toward the development of a non-intrusive system for the measurement of 2-D soot concentration in the cross section of an aero-engine exhaust plume.

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More information

Accepted/In Press date: 5 December 2015
e-pub ahead of print date: 10 December 2015
Published date: 15 April 2016

Identifiers

Local EPrints ID: 441684
URI: http://eprints.soton.ac.uk/id/eprint/441684
ISSN: 1530-437X
PURE UUID: 105a77f6-b986-426b-a927-68caa956ac67
ORCID for Yutong Feng: ORCID iD orcid.org/0000-0002-6839-2106
ORCID for Johan Nilsson: ORCID iD orcid.org/0000-0003-1691-7959

Catalogue record

Date deposited: 24 Jun 2020 16:30
Last modified: 07 Oct 2020 08:01

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