TY - JOUR
T1 - Experimental and computational studies of methanol and ethanol preignition behind reflected shock waves
AU - Figueroa Labastida, Miguel
AU - Luong, Minh Bau
AU - Badra, Jihad
AU - Im, Hong G.
AU - Farooq, Aamir
N1 - KAUST Repository Item: Exported on 2021-08-10
Acknowledgements: The paper is based on work supported by Saudi Aramco Research and Development Center FUELCOM program. FUELCOM (Fuel Combustion for Advanced Engines) is a collaborative research undertaking between Saudi Aramco and KAUST intended to address the fundamental aspects of hydrocarbon fuel combustion in engines, and develop fuel/engine design tools suitable for advanced combustion modes. This work used the computational resources of the KAUST Supercomputing Laboratory (KSL).
PY - 2021/8/7
Y1 - 2021/8/7
N2 - Experimental and computational investigations are carried out to identify the generalized criterion to predict the preignition tendency of methanol and ethanol mixtures in shock tubes. Preignition or weak ignition in shock tubes has been reported to be a significant factor impacting the accuracy of the ignition delay times data. A systematic means to predict the extent of non-idealities needs to be established and validated with experimental data over a wide range of conditions. Measurements of ignition delay times of methanol and ethanol mixtures were performed to identify unexpectedly expedited ignition. Methanol mixtures showed preignition at low temperatures, similarly to ethanol mixtures. Endwall high-speed imaging was implemented to assess spatial uniformity of ignition for methanol and ethanol. Furthermore, 1-D simulations of ethanol/methanol mixtures, in the presence of ignition sources, were utilized to investigate various preignition criteria. The Sankaran number criterion (Sap), proposed earlier for ignition regime identification, was found to be the most successful predictor of the experimental observations.
AB - Experimental and computational investigations are carried out to identify the generalized criterion to predict the preignition tendency of methanol and ethanol mixtures in shock tubes. Preignition or weak ignition in shock tubes has been reported to be a significant factor impacting the accuracy of the ignition delay times data. A systematic means to predict the extent of non-idealities needs to be established and validated with experimental data over a wide range of conditions. Measurements of ignition delay times of methanol and ethanol mixtures were performed to identify unexpectedly expedited ignition. Methanol mixtures showed preignition at low temperatures, similarly to ethanol mixtures. Endwall high-speed imaging was implemented to assess spatial uniformity of ignition for methanol and ethanol. Furthermore, 1-D simulations of ethanol/methanol mixtures, in the presence of ignition sources, were utilized to investigate various preignition criteria. The Sankaran number criterion (Sap), proposed earlier for ignition regime identification, was found to be the most successful predictor of the experimental observations.
UR - http://hdl.handle.net/10754/670488
UR - https://linkinghub.elsevier.com/retrieve/pii/S0010218021003643
U2 - 10.1016/j.combustflame.2021.111621
DO - 10.1016/j.combustflame.2021.111621
M3 - Article
SN - 0010-2180
VL - 234
SP - 111621
JO - Combustion and Flame
JF - Combustion and Flame
ER -