Electrical probe diagnostics for the laminar flame quenching distance

Karrer, Maxime; Bellenoue, Marc; Labuda, S. A.; Sotton, Julien; Makarov, M.

doi:10.1016/j.expthermflusci.2009.10.002

Cited by 19 publications

(10 citation statements)

References 24 publications

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“…An attempt is made to interpret the changes for the ionization current with the gas velocity, equivalence ratio and fuel composition. The approach builds on the work from Rodrigues (2005) and Karrer et al (2010). In the experiments conducted by Rodrigues (2005) with two electrodes inserted into a planar flame it is concluded that the drop of electrical potential takes place essentially near the cathode.…”

Section: Ionization Current Vs Dead Space Sizementioning

confidence: 99%

“…In the experiments conducted by Rodrigues (2005) with two electrodes inserted into a planar flame it is concluded that the drop of electrical potential takes place essentially near the cathode. Using a 1-D flame model, both Rodrigues (2005) and Karrer et al (2010) demonstrate that the ionization current intensity is related to the quenching distance near the cathode.…”

Section: Ionization Current Vs Dead Space Sizementioning

confidence: 99%

“…Franke (2002) and Rodrigues (2005) revealed that the surface area of the cathode is essential to achieve a strong current intensity. Analytical models derived by Rodrigues (2005) and Karrer et al (2010) reveal that the ionization current intensity is linked to with the flame quenching distance. Fewer studies are found for applications in domestic gas boilers.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Combustion state monitoring of premixed heating appliances with flame ionization current and chemiluminescence

Ding

Durox

Darabiha

et al. 2018

Combustion Science and Technology

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The development of a combustion operating point control system has received interests from gas boiler manufacturers in order to ensure optimized performances despite variations of natural gas composition. Fully premixed burners are widely used in these boilers and the equivalence ratio is a key parameter to control. Experiments are carried out in this study for CH 4 /air fuel blends diluted by N 2 or CO 2 or enriched by H 2 , C 2 H 6 , or C 3 H 8. Two low cost solutions for monitoring the equivalence ratio based on the flame ionization current and the chemiluminescence signal are investigated on a laboratory laminar conical flame. The behavior of the ionization current with changes of gas velocity, fuel composition, and equivalence ratio is shown to be mainly related to the size of the dead space between the flame base and burner rim. In a second stage, changes of the chemiluminescence signal is studied and the use of CH*/OH* intensity ratio as an equivalence ratio indicator is verified. Numerical 1-D premixed flame simulations are performed to support the experimental results on the flame chemiluminescence. Finally, a third equivalence ratio sensing method is proposed, coupling both techniques and the three strategies are compared.

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Section: Ionization Current Vs Dead Space Sizementioning

confidence: 99%

Section: Ionization Current Vs Dead Space Sizementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Combustion state monitoring of premixed heating appliances with flame ionization current and chemiluminescence

Ding

Durox

Darabiha

et al. 2018

Combustion Science and Technology

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“…Quenching diameters in round tubes are typically 50% larger [25]. The dead space (the closest approach of a premixed flame to a wall) is about 0.1L q [26,27]. The available measurements in both air and enriched oxygen were correlated here to obtain L q = 0.267X O2 , for methane [28,29], ethylene [25], and propane [29,30], respectively, where X O2 is oxygen mole fraction in the oxidizer.…”

Section: Scaling Modelmentioning

confidence: 99%

Quenching limits of inverse diffusion flames with enriched oxygen

Zhang

Sunderland

2015

Combustion and Flame

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“…The relation (4) between the normalized wall heat flux and the Peclet number can be used in combination with the definition of the Peclet number (2) to calculate the quenching distance. Several authors validated this procedure against laminar quenching distances of methane-air flames obtained by optical [6][7][8]37] and electrical probe diagnostics [24,25]. However, the definition of the flame position and thereby the quenching distance relied on an optical criterion (chemiluminescence of CH* and C Ã…”

Section: Quenching Distance Estimationmentioning

confidence: 99%

Experimental and simulative investigation of flame–wall interactions and quenching in spark-ignition engines

Suckart

Linse

Schutting

et al. 2016

Automot. Engine Technol.

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Flame-wall interactions are a crucial aspect concerning the design and optimisation of a spark-ignition engine. To improve the understanding of the phenomenon, flame-wall interactions are investigated by highly resolved wall heat flux measurements. For this purpose, a turbocharged, direct-injected spark-ignition engine was equipped with eight surface thermocouples and operated at five measuring points to examine the influence of speed, load, charge motion and equivalence ratio on the quenching process. A cycle-resolved analysis is utilized to extract the wall heat fluxes during flame-wall interaction which are subsequently used to calculate the quenching distances, as well as the normalised wall heat fluxes and Peclet numbers. To correctly estimate these values, a simulative methodology based upon a 3D-CFD in-cylinder flow and a 1D flame calculation with detailed chemical kinetics is employed. The 3D-CFD in-cylinder flow was combined with a 3D-FE heat conduction and 3D-CFD coolant flow simulation to properly predict the wall temperatures and thereby the near-wall flow state. The findings show that the quenching distance is proportional to the laminar flame thickness at first order. Hence, the engine load is found to be the main parameter influencing the quenching distance. The analysis of the quenching distances, normalized wall heat fluxes and Peclet numbers reveals that flame-wall interactions in spark-ignition engines exhibit strong similarities to laminar premixed flame-wall interactions. In addition, two correlations for calculating the quenching distance are proposed. These insights provide a deeper understanding of flame-wall interactions in spark-ignition engines and can be used to develop or adapt turbulent combustion models.

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Electrical probe diagnostics for the laminar flame quenching distance

Cited by 19 publications

References 24 publications

Combustion state monitoring of premixed heating appliances with flame ionization current and chemiluminescence

Combustion state monitoring of premixed heating appliances with flame ionization current and chemiluminescence

Quenching limits of inverse diffusion flames with enriched oxygen

Experimental and simulative investigation of flame–wall interactions and quenching in spark-ignition engines

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