Substantiation of the probe mass-spectrometric method for studying the structure of flames with narrow combustion zones

Коробейничев, О. П.; Tereshchenko, A. G.; Emel'yanov, I. D.; Rudnitskii, A. L.; Fedorov, S. Yu.; Куйбида, Л. В.; Lotov, V. V.

doi:10.1007/bf01463575

Cited by 24 publications

(8 citation statements)

References 3 publications

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“…where d is diameter of the orifice, Q is volumetric flow rate though the orifice, S is area of the orifice and V is velocity of the flow riding onto the probe [33]. Maximal value of the shift corresponds to position of the probe near the burner and does not exceed 0.3 mm.…”

Section: Methodsmentioning

confidence: 99%

“…There are two apparent reasons for this discrepancy. First, the spatial resolution of the probe with the orifice diameter of 0.08 mm is typically 0.1-0.2 mm [33,35]. Consequently, the concentrations measured by the probe are spatially averaged values; thus, the steep gradients cannot be accurately resolved, and the peak values are somewhat lower.…”

Section: Modeling Detailsmentioning

confidence: 99%

See 1 more Smart Citation

Formation and consumption of NO in H2+O2+N2 flames doped with NO or NH3 at atmospheric pressure

Шмаков

Коробейничев

Rybitskaya

et al. 2010

Combustion and Flame

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Section: Methodsmentioning

confidence: 99%

Section: Modeling Detailsmentioning

confidence: 99%

Formation and consumption of NO in H2+O2+N2 flames doped with NO or NH3 at atmospheric pressure

Шмаков

Коробейничев

Rybitskaya

et al. 2010

Combustion and Flame

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“…It was found that in these atmospheric experiments, the lifetime of the quartz probe is limited by the formation of a solid film of pyrophosphoric acids, especially near the probe tip, which alloys with heated quartz to form easily melted phosphate glass. Disturbance of the flames by the probe has been taken into account [27].…”

Section: Introductionmentioning

confidence: 99%

Flame inhibition by phosphorus-containing compounds in lean and rich propane flames

Коробейничев

Шварцберг

Шмаков

et al. 2005

Proceedings of the Combustion Institute

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Chemical inhibition of laminar propane flames by organophosphorus compounds has been studied experimentally, using a laboratory Mache Hebra nozzle burner and a flat flame burner with molecular beam mass spectrometry (MBMS), and with a computational flame model using a detailed chemical kinetic reaction mechanism. Both fuel-lean and fuel-rich propane flames were studied to examine the role of equivalence ratio in flame inhibition. The experiments examined a wide variety of organophosphorus compounds. We report on the experimental species flame profiles for tri-methyl phosphate (TMP) and compare them with the species flame profile results from modeling of TMP and di-methyl methyl phosphonate (DMMP). Both the experiments and kinetic modeling support and illustrate previous experimental studies in both premixed and non-premixed flames that inhibition efficiency is effectively the same for all of the organophosphorus compounds examined, independent of the molecular structure of the initial inhibitor molecule. The chemical inhibition is due to reactions involving the small P-bearing species HOPO 2 and HOPO that are produced by the organophosphorus compounds (OPCs). The ratios of the HOPO 2 and HOPO concentrations differ between the lean and rich flames, with HOPO 2 dominant in lean flames while HOPO dominates in rich flames. The resulting HOPO 2 and HOPO species profiles do not depend significantly on the initial source of the HOPO 2 and HOPO and thus are relatively insensitive to the initial OPC inhibitor. A more generalized form of the original Twarowski mechanism for hydrocarbon radical recombination is developed to account for the results observed, and new theoretical values have been determined for heats of formation of the important P-containing species, using the BAC-G2 method.

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“…Electron energies for each of the measured peaks are given in [17]. The correction for the flame perturbation due to the probe was calculated by the formulas of [18]. The root-mean-square errors of the measured mass peak intensities depended strongly on the corresponding flame species concentration and the background peak intensity and were not more than 5% (relative) for stable compounds, 10-15% for H atoms and OH radicals; for the phosphorus-containing products of TMP combustion, the errors were 15% for PO, PO 2 , and HOPO, 20% for HOPO 2 , and 25-30% for (HO) 3 Flame temperature profiles were measured by Pt/Pt-10% Rh thermocouples welded from 0.02-mm diameter wires and coated with a SiO 2 layer to prevent catalysis of radical recombination on the thermocouple surface.…”

Section: Experimental Techniquementioning

confidence: 99%

Influence of organophosphorus inhibitors on the structure of atmospheric lean and rich methane-oxygen flames

Knyazkov

Шварцберг

Шмаков

et al. 2007

Combust Explos Shock Waves

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The inhibition of atmospheric laminar methane-oxygen flames of various compositions by trimethyl phosphate was studied experimentally and by numerical modeling using mechanisms based on detailed kinetics. The H and OH concentration profiles in flames with and without the addition of trimethyl phosphate were measured and calculated. It was shown that the addition of the inhibitor reduced the maximum (in the reaction zone) concentrations of H and OH in lean and rich flames. The concentration reduction was higher in rich flames than in lean flames. The concentration profiles of the phosphorus-containing products PO, PO 2 , HOPO, HOPO 2 , and (HO) 3 PO in lean and rich flames stabilized on a flat burner were measured and calculated. Tests of the previously developed model of flame inhibition by phosphorus compounds showed that the model provides adequate predictions of many experimental results.

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Substantiation of the probe mass-spectrometric method for studying the structure of flames with narrow combustion zones

Cited by 24 publications

References 3 publications

Formation and consumption of NO in H2+O2+N2 flames doped with NO or NH3 at atmospheric pressure

Formation and consumption of NO in H2+O2+N2 flames doped with NO or NH3 at atmospheric pressure

Flame inhibition by phosphorus-containing compounds in lean and rich propane flames

Influence of organophosphorus inhibitors on the structure of atmospheric lean and rich methane-oxygen flames

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