OH and CH luminescence in opposed flow methane oxy-flames
2007年6月1日 · The UV and visible chemiluminescence of the excited radicals CH(A 2 Δ, B 2 Σ −) and OH(A 2 Σ +) is studied experimentally and numerically in opposed-flow diffusion flames of methane and oxygen-enriched air.
Hyperspectral image reconstruction from colored natural flame ...
2023年2月10日 · Natural flame luminosity (NFL) imaging is adopted to acquire the flame features and combustion characteristics in an optical engine by a high-speed color camera.
Hydrogen addition in methane-oxygen laminar inverse diffusion …
2024年2月7日 · In addition, it is found that the temperature peak of pure methane appears at the axial height of HAB = 60 mm, while the highest temperature of hydrogen addition flame is located at HAB = 80 mm. Overall, the presence of hydrogen in the methane fuel inhibits soot production, resulting in lower amounts of soot precursors at lower heights in the ...
Spectrally Resolved Measurement of Flame Radiation to …
2012年5月17日 · Comparison of structures of laminar methane–oxygen and methane–air diffusion flames from atmospheric to 60atm
Ultrafine Particulate Matter in Methane-Air Premixed Flames With Oxygen …
2021年8月12日 · A series of methane-air flames with oxygen enrichment is designed to systematically observe the effects of flame temperature and equivalence ratio on soot formation in premixed laminar flames. Flame conditions spanning 2.2 < Φ < 2.4 and 1,965 K < T f,max < 2,095 K are summarized in Table 1.
Characterization of the spectral signature of dual-fuel combustion ...
2019年6月10日 · Four significant contributions to the natural luminosity are identified: Soot, OH* and CH* chemiluminescence, as well as overlapping broadband chemiluminescence of CO 2 *, CHO* and CH 2 O* species. The CH* chemiluminescence can only be detected at ignition and during the pilot-fuel combustion period.
Methane/oxygen combustion in a rapidly mixed type tubular flame …
2013年1月1日 · This suggests that unconsumed methane in the diffusion flame zone flows downstream and reacts with the oxygen in a turbulent mode. When the methane flow rate was further increased to Φ = 0.50, a highly intensified luminous zone occupied the inside of the burner, while two diffusion flame bridges of weak luminosity can be still seen around the ...
Here we propose to study the influence of a magnetic gradient on the stability of methane diffusion flames with annular air coflow. We focus on the effects of the sign of the magnetic gradient both at injection, in the cold part where the direct attraction force on oxygen develops and along the flame front where magneto convection occurs. Figure 1.
(PDF) Characterization of the spectral signature of dual-fuel ...
2019年6月10日 · Four significant contributions to the natural luminosity are identified: Soot, OH* and CH* chemiluminescence, as well as overlapping broadband chemiluminescence of CO2*, CHO* and CH2O* species....
On the quantification of OH*, CH*, and C 2 - Springer
2012年4月27日 · Absolute concentrations of all important chemiluminescent species, OH–A, CH–A, CH–B, and C 2 -d have been measured for the first time in methane-oxygen flames at low pressure.