Study of the influence of electric fields on flames using planar LIF and PIV techniques

Altendorfner, Florian; Kuhl, Johannes; Zigan, Lars; Leipertz, Alfred

doi:10.1016/j.proci.2010.05.112

Cited by 50 publications

(22 citation statements)

References 16 publications

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“…Significant efforts have been made to study the effects of externally applied electric fields on the combustion process. In those studies, various types of flames have been studied, such as Bunsen flame [1][2][3][4], jet flame [5,6], flat flame [7], tribrachial flow flame [8], etc. Meanwhile, both direct current (DC) [9][10][11][12][13][14][15][16] and alternating-current (AC) [17][18][19][20][21] electric fields have been utilized.…”

Section: Introductionmentioning

confidence: 99%

Effects of Electric Fields on the Combustion Characteristics of Lean Burn Methane-Air Mixtures

Fang

Duan

et al. 2015

Energies

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Abstract:In this work, the effects of the electric fields on the flame propagation and combustion characteristics of lean premixed methane-air mixtures were experimentally investigated in a constant volume chamber. Results show that the flame front is remarkably stretched by the applied electric field, the stretched flame propagation velocity and the average flame propagation velocity are all accelerated significantly as the input voltage increases. This indicates that the applied electric field can augment the stretch in flame, and the result is more obvious for leaner mixture. According to the analyses of the combustion pressure variation and the heat release rate, the peak combustion pressure Pmax increases and its appearance time tp is advanced with the increase of the input voltage. For the mixture of λ = 1.6 at the input voltage of −12 kV, Pmax increases by almost 12.3%, and tp is advanced by almost 31.4%, compared to the case of without electric fields. In addition, the normalized mass burning rate and the accumulated mass fraction burned are all enhanced substantially, and the flame development duration and the rapid burning duration are remarkably reduced with the increase of the input voltage, and again, the influence of electric field is more profound for leaner mixtures. The results can be explained by the electric field-induced stretch effects on lean burn methane-air mixture. OPEN ACCESSEnergies 2015, 8 2588

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Section: Introductionmentioning

confidence: 99%

Effects of Electric Fields on the Combustion Characteristics of Lean Burn Methane-Air Mixtures

Fang

Duan

et al. 2015

Energies

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“…Furthermore, the flame cone angle increased with the electric field strength. In general, the reduced CO-and UHC-emission can be also explained by the modified flow field in the flame and increased residence time of the gas molecules in the flame [24]. Furthermore, a higher flame temperature is expected as also increased NO x -emissions were observed when electric flames were applied to flames [34].…”

Section: Electric Fields For Controlling Pollutant Emissions Of Flamesmentioning

confidence: 99%

“…This mechanism could also contribute to a controlled growth and aggregation of nano-particles in flame synthesis described in Section 2.3. Many fundamental experiments using lab-scale burners have been carried out for studying electric field enhanced combustion using premixed (see, e.g., [22][23][24][25][26][27][28][29][30]) and non-premixed flames [31,32]. Attempts for a technical application at higher thermal load were conducted by Weinberg et al for a meso-scale burner [33], by Sakhrieh et al for a Bunsen flame array [34] and Altendorfner et al [35] for a swirl flame that is usually applied in gas-turbine burners.…”

Section: Electric Field Assisted Combustionmentioning

confidence: 99%

“…Furthermore, a higher flame temperature is expected as also increased NO x -emissions were observed when electric flames were applied to flames [34]. For clarification, manifold fundamental studies were conducted in lab-scale flames using various optical diagnostics [24][25][26][27] (see also Section 5).…”

Section: Electric Fields For Controlling Pollutant Emissions Of Flamesmentioning

confidence: 99%

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Overview of Electric Field Applications in Energy and Process Engineering

Zigan

2018

Energies

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Heat and mass transfer as well as chemical reactions in technical processes can be enhanced by using electric fields. This paper provides an overview of current fundamental and applied research as well as potential technical applications of electric fields in energy and process engineering. This includes electrosprays, technical combustors as well as electrochemical reforming and plasma gasification of waste or biomass. Other emerging fields are plasma technologies for treatment of water, surfaces and gases including flue gases. In particle or aerosol-laden flows, plasmas are used to promote particle nucleation and surface growth for controlled nanomaterial synthesis. Furthermore, non-invasive diagnostics based on electromagnetic fields and electric fluid properties are relevant techniques for online control and optimization of technical processes. Finally, an overview of laser-based techniques is provided for studying electro-hydrodynamic effects, temperature, and species concentrations in plasma and electric-field enhanced processes.

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“…In recent years, considerable efforts have been directed to the study of flame and electric field interaction and its effects on the combustion process. In those studies, flames of various types such as Bunsen flame (Wisman, et al, 2007, Sakhrieh, et al, 2005, Kim, et al, 2011, Altendorfner, et al, 2011, Calcote, et al, 1951, jet flame (Lee, et al, 2005, flat flame (Kiyotaka, et al, 2009), tribrachial flow flame (Volkov, et al, 2013), etc. were used, and direct-current (DC) (Papac, et al, 2008, van den Boom, et al, 2009, Katzer, et al, 2001, Jing, et al, 2000, Memdouh, et al, 2010, Shinichi, et al, 2008, Eugene, et al, 2008, Marcum, et al, 2005) and alternating-current (AC) , Xie, et al, 1993, Won, et al, 2007, Won, et al, 2008, Zake, et al, 2001 electric fields were presented.…”

Section: Introductionmentioning

confidence: 99%

Effects of electrode configurations on the combustion characteristics of premixed methane-air flames

Fang

Duan

et al. 2015

JTST

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Study of the influence of electric fields on flames using planar LIF and PIV techniques

Cited by 50 publications

References 16 publications

Effects of Electric Fields on the Combustion Characteristics of Lean Burn Methane-Air Mixtures

Effects of Electric Fields on the Combustion Characteristics of Lean Burn Methane-Air Mixtures

Overview of Electric Field Applications in Energy and Process Engineering

Effects of electrode configurations on the combustion characteristics of premixed methane-air flames

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