Optical investigations of low-pressure acetylenefluorine flames, 1. Emissions, temperatures, and equilibrium composition of nonsooting and sooting flames

✍ Scribed by K.H. Homann; A. Kulcke-Czalbowski

• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 712 KB
• Volume: 60
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(85)90119-1

✦ Synopsis

Emission profiles and spectra in the visible, uv, and ir have been measured in quasi-premixed, flat C2H2-F2 flames at 7.0 mbar. The bands observed were those of C2, CH, and C3. In addition, three distinct continua have been observed which can be attributed to CF~, C3, and to polymeric species. The origin of the chemiluminescence emitters is discussed in connection with previously measured concentration profiles. In contrast to alkane--or H2-F2--flames highly vibrationaily excited HF was not found. The HF rotational temperature was determined as a function of height and C/F ratio. The maximum temperature was 2650 + 70K at a C/F = 0.19. The soot threshold lies at a C/F = 0.198, as compared to the equilibrium adiabatic value of 0.178.