Nitrogen Dioxide Formation in Gas Turbine Engines: Measurements and Measurement Methods

Reducing Interference Effects in the Chemiluminescent Measurement of Nitric Oxides from Combustion Systems

“…Also listed in this table are the values for m for these species as reported by Matthews et al 12 These values are similar except for Ar and H 2 O. This difference is attributed to the fact that in Matthews' work slopes were obtained by applying linear regression on the group of data reported by Tuttle and Mellor, 26 Maahs, 27 Niki et al, 28 Clyne et al, 11 and Matthews et al, 12 which had different (O3 + O 2 )/sample ratios in the reaction chamber. To a certain extent, these variations in In other words, the indicated [NO] will be about 71 percent of the actual amount present.…”

“…Problems associated with sampling for oxides of nitrogen have been reviewed in detail by Cernansky, 1 Tuttle et al 3 and Colket et al 13 These reviews have presented evidence that in many cases a sample system which permits accurate measurement of both NO and NO2 is required. The previously held view that nitrogen dioxide comprises only a small portion of the total oxides of nitrogen formed during combustion processes is not valid for all combustion systems.…”

Fast Nitrogen Dioxide Reactions: Significance during NO Decomposition and NO2Formation

“…Since 1971, several investigators have reported large concentrations of NO a in the exhaust of aircraft gas turbines (Anon., 1971;Tuttle et al, 1973). Such concentrations were unexpected on the basis of previous experimental and theoretical results (Cornelius and Wade, 1970;Marteney, 1970;Tuttle et al, 1973).…”

“…Such concentrations were unexpected on the basis of previous experimental and theoretical results (Cornelius and Wade, 1970;Marteney, 1970;Tuttle et al, 1973). More fundamental work has indicated the presence of NO a in both premixed and diffusion flames (Schefer et al, 1973;Merryman et al, 1974), but these investigators offer no mechanism by which NO a may be formed in practical systems.…”

“…Tuttle et al (1973) have discussed in detail the experimental difficulties encountered in measuring small quantities of NO a. Under fuel rich conditions, the converter-chemiluminescence method underestimates, while the NDUV method strongly overestimates [NOa].…”