Entrainment of cold gas into turbulent premixed acetylene flame
Apstrakt
Entrainment of surrounding air into premixed acetylene flame leads to a change in velocity and temperature fields. In this paper the mixing process between the premixed acetylene flame and surrounding air, in different regions of the flame, has been analyzed. Conditional and unconditional statistics of the LDA signals were performed using jet and/or air seed. Compared to commonly used unconditional statistics, conditional statistics of velocity fluctuations can give us more data about intensity of turbulent mixing in the flame. Mean velocity, turbulence intensity and probability density function of instantaneous velocities have been measured at different cross-sections of the flame, for premixed acetylene/air mixture with stoichiometric ratio. The velocity field measurements were performed with the laser-Doppler anemometer, while for the temperature field measurements Pt-PtRh10% thermocouple was used. Relations between mean velocities and probability density functions have been establi...shed in cases of conditional and unconditional seeding. Mixing factor has been defined as a measure of mixing intensity.
Ključne reči:
turbulent acetylene flame / conditional and unconditional LDA statistics / probability density functionsIzvor:
Combustion Science and Technology, 2001, 164, 95-112
DOI: 10.1080/00102200108952163
ISSN: 0010-2202; 1563-521X
WoS: 000171102300004
Scopus: 2-s2.0-0034880441
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Bakić, Vukman AU - Oka, Simeon N. PY - 2001 UR - https://vinar.vin.bg.ac.rs/handle/123456789/2459 AB - Entrainment of surrounding air into premixed acetylene flame leads to a change in velocity and temperature fields. In this paper the mixing process between the premixed acetylene flame and surrounding air, in different regions of the flame, has been analyzed. Conditional and unconditional statistics of the LDA signals were performed using jet and/or air seed. Compared to commonly used unconditional statistics, conditional statistics of velocity fluctuations can give us more data about intensity of turbulent mixing in the flame. Mean velocity, turbulence intensity and probability density function of instantaneous velocities have been measured at different cross-sections of the flame, for premixed acetylene/air mixture with stoichiometric ratio. The velocity field measurements were performed with the laser-Doppler anemometer, while for the temperature field measurements Pt-PtRh10% thermocouple was used. Relations between mean velocities and probability density functions have been established in cases of conditional and unconditional seeding. Mixing factor has been defined as a measure of mixing intensity. T2 - Combustion Science and Technology T1 - Entrainment of cold gas into turbulent premixed acetylene flame VL - 164 SP - 95 EP - 112 DO - 10.1080/00102200108952163 ER -
@article{ author = "Bakić, Vukman and Oka, Simeon N.", year = "2001", abstract = "Entrainment of surrounding air into premixed acetylene flame leads to a change in velocity and temperature fields. In this paper the mixing process between the premixed acetylene flame and surrounding air, in different regions of the flame, has been analyzed. Conditional and unconditional statistics of the LDA signals were performed using jet and/or air seed. Compared to commonly used unconditional statistics, conditional statistics of velocity fluctuations can give us more data about intensity of turbulent mixing in the flame. Mean velocity, turbulence intensity and probability density function of instantaneous velocities have been measured at different cross-sections of the flame, for premixed acetylene/air mixture with stoichiometric ratio. The velocity field measurements were performed with the laser-Doppler anemometer, while for the temperature field measurements Pt-PtRh10% thermocouple was used. Relations between mean velocities and probability density functions have been established in cases of conditional and unconditional seeding. Mixing factor has been defined as a measure of mixing intensity.", journal = "Combustion Science and Technology", title = "Entrainment of cold gas into turbulent premixed acetylene flame", volume = "164", pages = "95-112", doi = "10.1080/00102200108952163" }
Bakić, V.,& Oka, S. N.. (2001). Entrainment of cold gas into turbulent premixed acetylene flame. in Combustion Science and Technology, 164, 95-112. https://doi.org/10.1080/00102200108952163
Bakić V, Oka SN. Entrainment of cold gas into turbulent premixed acetylene flame. in Combustion Science and Technology. 2001;164:95-112. doi:10.1080/00102200108952163 .
Bakić, Vukman, Oka, Simeon N., "Entrainment of cold gas into turbulent premixed acetylene flame" in Combustion Science and Technology, 164 (2001):95-112, https://doi.org/10.1080/00102200108952163 . .