Time- and Space- Resolved Species Determination in Diesel Combustion Using Continuous Flow Gas Sampling

A two-photon nitric oxide (NO) laser-induced fluorescence (LIF) technique was developed and applied to study in-cylinder diesel combustion. The technique prevents many problems associated with in-cylinder, single-photon NO planar-laser-induced fluorescence measurements, including fluorescence interference from the Schumann-Runge bands of hot O2, absorption of a UV excitation beam by in-cylinder gases, and difficulty in rejecting scattered laser light while simultaneously attempting to maximize fluorescence signal collection. Verification that the signal resulted from NO was provided by tuning of the laser to a vibrational off-resonance wavelength that showed near-zero signal levels, which resulted from either fluorescence or interference at in-cylinder pressures of as much as 20 bar. The two-photon NO LIF signal showed good qualitative agreement with NO exhaust-gas measurements obtained over a wide range of engine loads.

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Two-Photon Laser-Induced Fluorescence of Nitric Oxide in a Diesel Engine

Martin

Mueller

Lee

2006

SAE Technical Paper Series

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Time- and Space- Resolved Species Determination in Diesel Combustion Using Continuous Flow Gas Sampling

Cited by 21 publications

References 12 publications

Effect of hydrogen-diesel fuel co-combustion on exhaust emissions with verification using an in–cylinder gas sampling technique

Effect of hydrogen-diesel fuel co-combustion on exhaust emissions with verification using an in–cylinder gas sampling technique

Two-photon nitric oxide laser-induced fluorescence measurements in a diesel engine

Two-Photon Laser-Induced Fluorescence of Nitric Oxide in a Diesel Engine

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