Experimental study on cellular instabilities in hydrocarbon/hydrogen/carbon monoxide–air premixed flames

2011 ◽  
Vol 36 (11) ◽  
pp. 6914-6924 ◽  
Author(s):  
Tran Manh Vu ◽  
Jeong Park ◽  
Jeong Soo Kim ◽  
Oh Boong Kwon ◽  
Jin Han Yun ◽  
...  
Keyword(s):  
Experimental Study ◽  
Carbon Monoxide ◽  
Premixed Flames

Experimental Study in H2/CO/CH4–Air and H2/CO/C3H8–Air Premixed Flames. Part 2: Cellular Instabilities

2011 ◽  
Vol 673 ◽  
pp. 71-76
Author(s):  
Tran Manh Vu ◽  
Jeong Park ◽  
Jeong Soo Kim ◽  
Oh Boong Kwon ◽  
Jin Han Yun ◽  
...  
Keyword(s):  
Experimental Study ◽  
Carbon Monoxide ◽  
Combustion Chamber ◽  
Room Temperature ◽  
Constant Pressure ◽  
Premixed Flames ◽  
Elevated Pressures ◽  
Schlieren System ◽  
Flame Instabilities

Experiments in a constant pressure combustion chamber at room temperature and elevated pressures using schlieren system were conducted to investigate the cellular instabilities in hydrogen/carbon monoxide/methane (or propane)–air premixed flames. In the present study, hydrodynamic and diffusional-thermal instabilities were evaluated to elucidate their effects to flame instabilities. Effective Lewis numbers of premixed flames with methane addition decrease for all of the cases. Meanwhile, the effective Lewis numbers with propane addition increase for lean and stoichiometric conditions, but they increase for rich and stoichiometric cases for hydrogen-enriched flames. With propane addition, the propensity for cells formation is significantly diminished whereas the cellular instabilities for hydrogen enriched flames are promoted. With methane addition, the similar behavior of cellularity is obtained, indicating that methane is not a candidate for suppressing cells formation in hydrogen/carbon monoxide/methane–air premixed flames.

An experimental study of the influences of tobacco smoke on fertility and reproduction

1999 ◽  
Vol 18 (4) ◽  
pp. 272-278 ◽  
Author(s):  
Ewa Florek ◽  
Andrzej Marszalek
Keyword(s):  
Experimental Study ◽  
Carbon Monoxide ◽  
Tobacco Smoke ◽  
Female Rats ◽  
Dose Effect ◽  
Smoke Inhalation ◽  
Initial Number ◽  
Cigarette Brand ◽  
Duration Of Pregnancy ◽  
Parent Generation

1 The aim of this study was to evaluate the toxicological influence of tobacco smoke on fertility and reproduction of Wistar female rats. The influence of tobacco smoke from the Polish ‘Popularne’ cigarette brand was studied. The experiment was conducted on three generations of animals, each generation having two litters. The initial number of animals of the parent generation FO was 192 (128 females and 64 males). Animals were passively exposed to tobacco smoke in three different concentrations based on the content of carbon monoxide (500, 1000 and 1500 mg of CO per cubic meter of air). Animals were exposed to tobacco smoke for 6 h a day, 5 days a week, during 11 weeks. 2 The analysis of indices of mating and fertility revealed the decrease in those indices with animals exposed to tobacco smoke. We also observed an increased number of mothers breading among animals exposed to tobacco smoke. In animals exposed to tobacco smoke, the dose-effect or dose-response dependencies for mating, fertility and delivery indices were found. There was no influence of tobacco smoke on the duration of pregnancy. 3 Tobacco smoke inhalation caused increased levels of carboxyhaemoglobin. 4 Tobacco smoke did not change the duration of pregnancy in rats.

An experimental investigation into the behavior of premixed flames of hydrogen/carbon monoxide/air mixtures in a half-open duct

Fuel ◽  
2019 ◽  
Vol 237 ◽  
pp. 619-629 ◽  
Author(s):  
Xufeng Yang ◽  
Minggao Yu ◽  
Kai Zheng ◽  
Shaojie Wan ◽  
Liang Wang
Keyword(s):  
Experimental Investigation ◽  
Carbon Monoxide ◽  
Premixed Flames

Reductive intramolecular hydrogen transfer in a d8 metal hydride promoted by carbon monoxide addition. An experimental study and its theoretical implications

1984 ◽  
Vol 23 (7) ◽  
pp. 922-929 ◽  
Author(s):  
Franco Cecconi ◽  
Carlo A. Ghilardi ◽  
Paolo Innocenti ◽  
Carlo Mealli ◽  
Stefano Midollini ◽  
...  
Keyword(s):  
Experimental Study ◽  
Carbon Monoxide ◽  
Metal Hydride ◽  
Hydrogen Transfer ◽  
Intramolecular Hydrogen

scholarly journals Experimental study of the influence of hydrogen as a fuel additive on the formation of soot precursors and particles in atmospheric laminar premixed flames of methane

Fuel ◽  
2021 ◽  
Vol 287 ◽  
pp. 119517
Author(s):  
Hong-Quan Do ◽  
Luc-Sy Tran ◽  
Laurent Gasnot ◽  
Xavier Mercier ◽  
Abderrahman El Bakali
Keyword(s):  
Experimental Study ◽  
Premixed Flames ◽  
Fuel Additive ◽  
Soot Precursors

An experimental study of the pathogenesis of Grinker's myelinopathy in carbon monoxide intoxication

1983 ◽  
Vol 59 (3) ◽  
pp. 200-206 ◽  
Author(s):  
R. Okeda ◽  
S. -Y. Song ◽  
N. Funta ◽  
F. Higashino
Keyword(s):  
Experimental Study ◽  
Carbon Monoxide ◽  
Carbon Monoxide Intoxication

330 Experimental Study of Effects of Air Dilution on Wall Impingement Premixed Flames

2014 ◽  
Vol 2014.63 (0) ◽  
pp. _330-1_-_330-2_
Author(s):  
Yoshitaka Nakao ◽  
Tsuneyoshi Matsuoka ◽  
Susumu Noda
Keyword(s):  
Experimental Study ◽  
Premixed Flames ◽  
Wall Impingement

Investigation of nitrogen-diluted syngas non-premixed flames measured by planar laser-induced fluorescence of hydroxyl and particle image velocimetry

2011 ◽  
Vol 225 (7) ◽  
pp. 1672-1680
Author(s):  
P Guo ◽  
S Zang ◽  
B Ge ◽  
Y Tian
Keyword(s):  
Carbon Monoxide ◽  
Particle Image Velocimetry ◽  
Particle Image ◽  
Premixed Flames ◽  
Laser Induced Fluorescence ◽  
Experimental Results ◽  
Planar Laser Induced Fluorescence ◽  
Image Velocimetry ◽  
Planar Laser ◽  
Recirculation Zones

In order to investigate the effects of nitrogen dilution on combustion behaviour of syngas flames, a model combustor with optical access for swirl non-premixed flames was developed. Experimental results from planar laser-induced fluorescence (PLIF) of OH and particle image velocimetry (PIV) are presented. The syngas consists of hydrogen and carbon monoxide of volume fraction ratio kept at 0.78. Up to 60 per cent (by volume) of nitrogen was added into syngas, as well as reference fuels including methane, hydrogen, and carbon monoxide, for dilution. Flow fields obtained by PIV reveal that the averaged typical swirling flow structure is not influenced by dilution content, which has more effect on turbulence intensities in recirculation zones and shear layers. Additionally, analysis of reaction zones and regions of burnt gas from OH-PLIF measurement shows that although syngas flame burns closer to fuel spray exit than methane, the latter shows more combustion stability, probably because of the different stabilization mechanisms for these two flames. With less support from hot burned gases in recirculation zones, the content of hydrogen plays a crucial role in syngas flame stabilization. Experimental results also imply that the increase of dilution content in fuel leads to less flame opening angle and thinner flame base.

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