TY - JOUR
T1 - Optimization of double plasma jet torches in a scramjet combustor
AU - Takita, Kenichi
AU - Nakane, Hideaki
AU - Masuya, Goro
N1 - Funding Information:
The authors are grateful to Mr. Jun Ikeda and Mr. Naoyuki Abe for their assistance in experiments. This study was supported by Sumitomo Foundation and JFE 21st Century Foundation.
PY - 2007
Y1 - 2007
N2 - Ignition tests by double plasma jet (PJ) torches in a supersonic flow were conducted. Two PJ torches with different feedstocks were arranged in a straight line in the direction of flow. The Mach number of the airflow was 2.3, and the total temperature and total pressure of the main flow were those of room conditions. A C2H4 fuel perpendicularly injected with its sonic speed into the main flow was tested. A combination of O2-O 2 feedstocks for the two torches was more effective than other combinations such as H2/N2-O2. Moreover, the effectiveness of the double PJs was found to be almost the same as that of a single PJ. These results indicate that combustion reactions of the main fuel injected upstream of the PJ were mostly completed in the vicinity of the upstream PJ. The upstream PJ was considered to be dominant for ignition and the combustion process, indicating that the influence of the downstream PJ was small. On the other hand, the advantage of the double PJs over the single PJ in reducing damage to the torch nozzle was confirmed.
AB - Ignition tests by double plasma jet (PJ) torches in a supersonic flow were conducted. Two PJ torches with different feedstocks were arranged in a straight line in the direction of flow. The Mach number of the airflow was 2.3, and the total temperature and total pressure of the main flow were those of room conditions. A C2H4 fuel perpendicularly injected with its sonic speed into the main flow was tested. A combination of O2-O 2 feedstocks for the two torches was more effective than other combinations such as H2/N2-O2. Moreover, the effectiveness of the double PJs was found to be almost the same as that of a single PJ. These results indicate that combustion reactions of the main fuel injected upstream of the PJ were mostly completed in the vicinity of the upstream PJ. The upstream PJ was considered to be dominant for ignition and the combustion process, indicating that the influence of the downstream PJ was small. On the other hand, the advantage of the double PJs over the single PJ in reducing damage to the torch nozzle was confirmed.
KW - Ignition
KW - Plasma torch
KW - Radical
KW - Scramjet
KW - Supersonic combustion
UR - http://www.scopus.com/inward/record.url?scp=34548714707&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34548714707&partnerID=8YFLogxK
U2 - 10.1016/j.proci.2006.07.054
DO - 10.1016/j.proci.2006.07.054
M3 - Conference article
AN - SCOPUS:34548714707
SN - 1540-7489
VL - 31 II
SP - 2513
EP - 2520
JO - Proceedings of the Combustion Institute
JF - Proceedings of the Combustion Institute
T2 - 31st International Symposium on Combustion
Y2 - 5 August 2006 through 11 August 2006
ER -