Real-time diagnostics of a jet engine exhaust using an intra-pulse quantum cascade laser spectrometer

Geoffrey Duxbury (1, 2) , Kenneth G. Hay (3) , Nigel Langford (2) , Mark P. Johnson (4) , John D. Black (5)

1 HOME
2 Department of Physics [Glasgow]
3 Cascade Technologies
4 Rolls Royce Plc
5 School of Electrical and Electronic Engineering

It has been demonstrated that an intra-pulse scanned quantum cascade laser spectrometer may be used to obtain real-time diagnostics of the amounts of carbon monoxide, carbon dioxide, and water, in the ¬exhaust of an aero- gas turbine (turbojet) engine operated in a sea level test cell. Measurements have been made of the rapid changes in composition following ignition, the composition under steady state operating conditions, and the composition changes across the exhaust plume. The minimum detection limit for CO in a double pass through a typical gas turbine plume of 50 cm in diameter, with 0.4 seconds integration time, is approximately 2 ppm.

Mots clés: Physical Sciences

Domaines: Matière Condensée [cond-mat]

Geoffrey Duxbury, Kenneth G. Hay, Nigel Langford, Mark P. Johnson, John D. Black. Real-time diagnostics of a jet engine exhaust using an intra-pulse quantum cascade laser spectrometer. Molecular Physics, 2011, 109 (17-18), pp.1. ⟨10.1080/00268976.2011.610367⟩. ⟨hal-00728415⟩