Experimental and numerical study on the ignition delay times of dimethyl ether/propane mixtures in O2/CO2 atmospheres. (15th May 2022)

• Record Type: Journal Article
• Authors: Yang, Jinling; Zou, Chun; Li, Wenyu; Lin, Qianjin; Lu, Lixin; Xia, Wenxiang
• Is Part Of: Fuel. Volume 316(2022)
• Publication Date: 2022-05-15
• Subjects: Dimethyl ether (DME) -- Propane -- Ignition delay time (IDT) -- O2/CO2 atmosphere; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2022.123301
• Languages: English
• ISSNs: 0016-2361

Abstract

Highlights: The IDTs of DME /propane mixtures in O2 /CO2 atmospheres were measured. A detail kinetic model referred as the DME-C3 H8 model was constructed. The effects of the DME blending ratio were studied using the DME-C3 H8 model. The effects of CO2 and pressure on the ignition were discussed in detail. Abstract: This work measured the ignition delay times (IDTs) of dimethyl ether (DME)/propane mixtures in O2 /CO2 atmosphere in a shock tube at an equivalence ratio of 0.5, a temperature range of 1157–1380 K, pressures of 2 and 10 atm, and a DME blending ratio range of 0–100%. A detailed kinetic model referred to as the DME-C3 H8 model was constructed based on the OXYMECH 2.0 model and the DME sub-mechanism of Aramco 3.0. The DME-C3 H8, Aramco 3.0, NUIG 1.0, and Dames models were evaluated through the IDTs obtained in the present study, and from literature in O2 /N2 and O2 /Ar atmosphere. The impact of the DME blending ratio was investigated using the DME-C3 H8 model, and results show that the IDTs in O2 /CO2 atmosphere at pressures of 2 and 10 atm decrease linearly with increased DME blending ratio; there exists a clear synergy effect between DME and propane in the O2 /N2 atmosphere at the pressure of 2 atm, which is significantly weakened at the pressure of 10 atm. The impact of CO2 and pressure on the ignition were discussed in detail.