Experimental Determination of Pdfs of OH Radicals in IC Engines Using Calibrated Laser-Induced Fluorescence as a Basis for Modelling the End-Phase of Engine Combustion

2000 ◽  
Vol 158 (1) ◽  
pp. 485-509 ◽  
Author(s):  
P. PIXNER ◽  
R. SCHIESSL ◽  
A. DREIZLER ◽  
U. MAAS
Keyword(s):  
Experimental Determination ◽  
Laser Induced Fluorescence ◽  
Oh Radicals ◽  
Engine Combustion ◽  
Ic Engines

scholarly journals Measurement of OH reactivity by laser flash photolysis coupled with laser-induced fluorescence spectroscopy

2016 ◽  
Author(s):  
Daniel Stone ◽  
Lisa K. Whalley ◽  
Trevor Ingham ◽  
Peter M. Edwards ◽  
Daniel R. Cryer ◽  
...  
Keyword(s):  
Loss Rate ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Laser Induced Fluorescence ◽  
Ozone Production ◽  
Oh Radicals ◽  
Field Campaigns ◽  
Lif Spectroscopy

Abstract. OH reactivity (k'OH) is the total pseudo-first-order loss rate coefficient describing the removal of OH radicals to all sinks in the atmosphere, and is the inverse of the chemical lifetime of OH. Measurements of ambient OH reactivity can be used to discover the extent to which measured OH sinks contribute to the total OH loss rate. Thus, OH reactivity measurements enable determination of the comprehensiveness of measurements used to predict air quality and ozone production, and, in conjunction with measurements of OH radical concentrations, to assess our understanding of OH production rates. In this work, we describe the design and characterisation of an instrument to measure OH reactivity using laser flash photolysis coupled to laser-induced fluorescence (LFP-LIF) spectroscopy. The LFP-LIF technique produces OH radicals in isolation, and thus minimises potential interferences in OH reactivity measurements owing to the reaction of HO2 with NO which can occur if HO2 is co-produced with OH in the instrument. Capabilities of the instrument for ambient OH reactivity measurements are illustrated by data collected during field campaigns in London, UK, and York, UK. We also present the coupling and characterisation of the LFP-LIF instrument to an atmospheric chamber for measurements of OH reactivity during simulated experiments, and provide suggestions for future improvements to OH reactivity LFP-LIF instruments.

Experimental determination of the rate constant of the reaction between C 2 H 5 O 2 and OH radicals

2015 ◽  
Vol 619 ◽  
pp. 196-200 ◽  
Author(s):  
Eszter P. Faragó ◽  
Coralie Schoemaecker ◽  
Béla Viskolcz ◽  
Christa Fittschen
Keyword(s):  
Experimental Determination ◽  
Rate Constant ◽  
Oh Radicals

Experimental determination of a state equation for dissipative granular gases

1999 ◽  
Vol 96 (6) ◽  
pp. 1111-1116 ◽  
Author(s):  
E. Falcon ◽  
S. Fauve ◽  
C. Laroche
Keyword(s):  
Experimental Determination ◽  
State Equation ◽  
Granular Gases
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