An investigation on laminar burning speed and flame structure of anisole-air mixture

Zare, Saeid; Roy, Shrabanti; Maadi, Aiman El; Askari, Omid

doi:10.1016/j.fuel.2019.01.149

Cited by 37 publications

(11 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Laminar burning speed is an important thermophysical property of any air–fuel mixture. − The Mech 9 mechanism from the previous section is used in calculating LBS at different temperatures and equivalence ratios. The calculation is done using open source code Cantera .…”

Section: Methodsmentioning

confidence: 99%

A New Detailed Ethanol Kinetic Mechanism at Engine-Relevant Conditions

Roy

Askari

2020

Energy Fuels

Self Cite

View full text Add to dashboard Cite

Ethanol is considered one of the most attractive renewable energy sources in the modern days. A chemical mechanism on ethanol is generated in this work to predict the performance of this fuel in engine-relevant operating conditions. To build this mechanism, a reaction mechanism generator (RMG) is utilized. The generated mechanism is compared against experimental results to find its accuracy. Important reactions responsible for the results are selected through sensitivity and path flux analysis. The rate parameter of important reactions is further adjusted from available literature data. The final mechanism is named PCRL-Mech1 and consists of 67 species and 1016 reactions. This mechanism shows an excellent agreement with experimental results of laminar burning speed and ignition delay time (using a shock tube and rapid compression machine). The mechanism is validated at temperatures, pressures, and equivalence ratios of 300−600 K, 1−10 atm, and 0.6−1.4 for laminar burning speed, respectively. For ignition delay time verification, temperatures of 820−1450 K, pressures of 3.3−80 atm, and equivalence ratios of 0.3−2 are considered. The newly developed mechanism is also validated for species concentration through a flow reactor, a jet stirred reactor, and a partially premixed counter flow flame. Finally, the PCRL-Mech1 mechanism is compared with six-top mechanisms available in literature. A normalized ratio of accuracy and computational time for other mechanisms with respect to PCRL-Mech1 is generated. It is found that PCRL-Mech1 has better combination of accuracy and time throughout all the varied operating conditions.

show abstract

Section: Methodsmentioning

confidence: 99%

A New Detailed Ethanol Kinetic Mechanism at Engine-Relevant Conditions

Roy

Askari

2020

Energy Fuels

Self Cite

View full text Add to dashboard Cite

show abstract

“…In addition, the flame shape has been recorded by means of two cameras in different plasma and flow conditions. A high-speed mono-color complementary metaloxide-semiconductor (CMOS) camera, Phantom V611 [48], has been utilized to deliver suitable photos for image processing and geometrical data extraction. A second color CMOS was used to take color photos from the flame.…”

Section: Methodsmentioning

confidence: 99%

Flame Stability in Inverse Coaxial Injector Using Repetitive Nanosecond Pulsed Plasma

Zare

Askari

2020

Journal of Energy Resources Technology

Self Cite

View full text Add to dashboard Cite

Recently, methane has been investigated as a feasible fuel for propulsion systems. The higher boiling point and higher density of methane, compared with hydrogen, makes its storage tank lighter, cheaper, and smaller to launch. Methane is abundant in the outer solar system and can be harvested on Mars, Titan, Jupiter, and many other planets and therefore, it can be used in reusable rocket engines. However, there are still some technological challenges in the methane engines development path. For example, ignition reliability and flame stability are of great importance. These challenges can be addressed by integrating low-temperature plasma (LTP) through repetitive nanosecond pulsed (RNP) discharge to the injector design. This research focuses on air/CH4 jet flames in a single-element coaxial shear injector coupled with RNP plasma discharge to study the influence of LTP on ignition characteristics and flame stability using advanced diagnostic techniques. The experiments have been performed for different fuel composition, jet velocities, discharge voltages, and frequencies at atmospheric conditions. The transient flame behavior including flame oscillation is studied using direct photography by CMOS high-speed camera. The effect of plasma discharge location on flame stability is also investigated. To demonstrate the effectiveness of RNP discharge on liftoff and blowout/blowoff velocities, the jet velocity at the critical conditions is measured and the enhancements of flame stability are then evaluated. The collected experimental data have shown that the RNP discharge can significantly extend the stability by reducing the liftoff height and increasing the velocity of blowout/blowoff phenomena.

show abstract

“…Based on the abundant phenoxy and methyl functional groups in the molecular structure of lignin, anisole was proposed as the surrogate fuel to represent the combustion behavior of lignocellulosic biomass [7]. Hence, many studies have focused on the fundamentals of the combustion characteristics of anisole aiming for different measurement targets: shock tube (ST) [8][9][10][11] and rapid compression machine (RCM) [8] for the ignition delay time (IDT); Bunsen burner [12], heat flux burner [7], and combustion vessel [13] for the flame speed; flow reactor (FR) [14][15][16][17][18][19][20], jet stirred reactor (JSR) [7,[21][22][23], and premixed flames [24] for the speciation data. Table 1 summarizes the previous experimental work on anisole combustion/pyrolysis chemistry exploration.…”

Section: Introductionmentioning

confidence: 99%