Abstract
Spontaneous ignition of isolated two-component fuel droplets has been experimentally studied. The components were n-decane (ND)/1-methylnaphthalene (MN), or ND/1,2,4-trimethylbenzene (TMB). Both are n-alkane/aromatic mixtures, and therefore are candidates for model fuels of multicomponent commercial fuels refined from crude petroleum. ND showed two-stage ignition behavior, while the other two fuels (aromatic hydrocarbons) did not and were less reactive. A suspended droplet was suddenly brought to a high temperature for ignition. Observation by a Michelson interferometer detected cool-flame appearance as well as hot-flame appearance. The ambient gas was air, and the droplet diameter was 0.7 mm. The experimental conditions that were varied were ambient temperature, Ta, (500-1000 K), ambient pressure, Pa, (0.1-2.0 MPa), and the initial mole fraction of ND in the liquid phase, Z (0-1). In the case Z ≠ 1, Pa was fixed to 0.3 MPa. Ignition delays for cool-flame and hot-flame appearance (t1 and ttot) and the difference between them (t2) were measured, and ignition types (no ignition, cool-flame only, singlestage ignition, and two-stage ignition) were classified on a "Z-Ta" map. It is common to ND/MN and ND/TMB that two-stage ignition region is narrowed and finally vanishes as Z decreases, and that t1, t2, and ttot all increase monotonically as Z decreases. However, TMB was affected more than MN because of its higher volatility. (Normal boiling point: ND 447.3 K, MN 517.9 K, TMB 442.5 K) Numerical simulation with a fully transient one-dimensional model was employed to help the interpretation.
| Original language | English |
|---|---|
| Pages (from-to) | 969-975 |
| Number of pages | 7 |
| Journal | Proceedings of the Combustion Institute |
| Volume | 28 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jan 1 2000 |
| Event | 30th International Symposium on Combustion - Chicago, IL, United States Duration: Jul 25 2004 → Jul 30 2004 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Mechanical Engineering
- Physical and Theoretical Chemistry
Cite this
Effects of dilution by aromatic hydrocarbons on staged ignition behavior of n-decane droplets. / Moriue, O.; Eigenbrod, C.; Rath, H. J.; Sato, J.; Okai, K.; Tsue, M.; Kono, M.
In: Proceedings of the Combustion Institute, Vol. 28, No. 1, 01.01.2000, p. 969-975.Research output: Contribution to journal › Conference article
}
TY - JOUR
T1 - Effects of dilution by aromatic hydrocarbons on staged ignition behavior of n-decane droplets
AU - Moriue, O.
AU - Eigenbrod, C.
AU - Rath, H. J.
AU - Sato, J.
AU - Okai, K.
AU - Tsue, M.
AU - Kono, M.
PY - 2000/1/1
Y1 - 2000/1/1
N2 - Spontaneous ignition of isolated two-component fuel droplets has been experimentally studied. The components were n-decane (ND)/1-methylnaphthalene (MN), or ND/1,2,4-trimethylbenzene (TMB). Both are n-alkane/aromatic mixtures, and therefore are candidates for model fuels of multicomponent commercial fuels refined from crude petroleum. ND showed two-stage ignition behavior, while the other two fuels (aromatic hydrocarbons) did not and were less reactive. A suspended droplet was suddenly brought to a high temperature for ignition. Observation by a Michelson interferometer detected cool-flame appearance as well as hot-flame appearance. The ambient gas was air, and the droplet diameter was 0.7 mm. The experimental conditions that were varied were ambient temperature, Ta, (500-1000 K), ambient pressure, Pa, (0.1-2.0 MPa), and the initial mole fraction of ND in the liquid phase, Z (0-1). In the case Z ≠ 1, Pa was fixed to 0.3 MPa. Ignition delays for cool-flame and hot-flame appearance (t1 and ttot) and the difference between them (t2) were measured, and ignition types (no ignition, cool-flame only, singlestage ignition, and two-stage ignition) were classified on a "Z-Ta" map. It is common to ND/MN and ND/TMB that two-stage ignition region is narrowed and finally vanishes as Z decreases, and that t1, t2, and ttot all increase monotonically as Z decreases. However, TMB was affected more than MN because of its higher volatility. (Normal boiling point: ND 447.3 K, MN 517.9 K, TMB 442.5 K) Numerical simulation with a fully transient one-dimensional model was employed to help the interpretation.
AB - Spontaneous ignition of isolated two-component fuel droplets has been experimentally studied. The components were n-decane (ND)/1-methylnaphthalene (MN), or ND/1,2,4-trimethylbenzene (TMB). Both are n-alkane/aromatic mixtures, and therefore are candidates for model fuels of multicomponent commercial fuels refined from crude petroleum. ND showed two-stage ignition behavior, while the other two fuels (aromatic hydrocarbons) did not and were less reactive. A suspended droplet was suddenly brought to a high temperature for ignition. Observation by a Michelson interferometer detected cool-flame appearance as well as hot-flame appearance. The ambient gas was air, and the droplet diameter was 0.7 mm. The experimental conditions that were varied were ambient temperature, Ta, (500-1000 K), ambient pressure, Pa, (0.1-2.0 MPa), and the initial mole fraction of ND in the liquid phase, Z (0-1). In the case Z ≠ 1, Pa was fixed to 0.3 MPa. Ignition delays for cool-flame and hot-flame appearance (t1 and ttot) and the difference between them (t2) were measured, and ignition types (no ignition, cool-flame only, singlestage ignition, and two-stage ignition) were classified on a "Z-Ta" map. It is common to ND/MN and ND/TMB that two-stage ignition region is narrowed and finally vanishes as Z decreases, and that t1, t2, and ttot all increase monotonically as Z decreases. However, TMB was affected more than MN because of its higher volatility. (Normal boiling point: ND 447.3 K, MN 517.9 K, TMB 442.5 K) Numerical simulation with a fully transient one-dimensional model was employed to help the interpretation.
UR - http://www.scopus.com/inward/record.url?scp=84915784370&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84915784370&partnerID=8YFLogxK
U2 - 10.1016/S0082-0784(00)80303-3
DO - 10.1016/S0082-0784(00)80303-3
M3 - Conference article
AN - SCOPUS:84915784370
VL - 28
SP - 969
EP - 975
JO - Proceedings of the Combustion Institute
JF - Proceedings of the Combustion Institute
SN - 1540-7489
IS - 1
ER -