3D Numerical Simulation of a Laminar Experimental SWQ Burner with Tabulated Chemistry

Heinrich, Arne; Ganter, Sebastian; Kuenne, G.; Jainski, Christopher; Dreizler, Andreas; Janicka, J.

doi:10.1007/s10494-017-9851-9

Cited by 18 publications

(18 citation statements)

References 28 publications

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“…In the most studies which applied the laser diagnostics methods, the methane/air premixed flames were chosen as the fundamental flame because it had the simple chemical mechanism and less soot formation [92][93][94][95][96][97][98][99]102,103 which might interfere the measurements of laser devices. Several researchers also adopted some other complex gas fuels in the 91 methane/air premixed flames, Häber and Suntz also conducted the experiments of the influence of wall materials on pollutants emissions in FWI of propane/air flames with a wide range of equivalence ratios as the supplement for the previous studies.…”

Section: Arrangements Of Fuel Types Flame Types and The Plate Positimentioning

confidence: 99%

Pollutants Emissions of CO and Soot from Flame-wall Interactions in Fundamental and Practical Energy Conversion Systems: A Review

Luo¹,

Liu²

2018

ES Energy Environ.

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Flame-wall interactions (FWI) as one kind of fundamental combustion phenomenon is universally found in various laboratory and practical combustion devices. It not only affects the combustion and energy conversion efficiency but also induces severe pollutants emissions. This review summarizes the pollutants emission characteristics in FWI from CO and soot aspects. The investigations of CO formation from FWI in various fundamental and practical energy conversion systems with different fuel types, operating conditions, sampling and analyzing methods and etc. are separately discussed. Meanwhile, multiple advanced laser diagnostics techniques are also adopted in different laboratory impinging flames to acquire more accurate and precise measurements of CO distributions in FWI. To gain more knowledge of pollutants emissions in FWI, the behaviors of soot from practical internal engines are observed with the aid of visualization techniques. Studies that utilize different combustion system configurations to modulate soot formation in FWI of practical engines are conducted as well. Recent literature subsequently evaluates the variations of soot morphology and nanostructure in FWI. The characteristics of soot particle size distribution function (PSDF) from FWI are briefly studied via burner-stabilized stagnation (BBS) flames at laboratory scale. The review ends with the unresolved issues for the future research.

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Section: Arrangements Of Fuel Types Flame Types and The Plate Positimentioning

confidence: 99%

Pollutants Emissions of CO and Soot from Flame-wall Interactions in Fundamental and Practical Energy Conversion Systems: A Review

Luo¹,

Liu²

2018

ES Energy Environ.

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“…Since ATF is used for the flame-turbulence interaction, the turbulent diffusion is switched of in the region of the flame. As explained in [16], the influence of the dynamic thickening on relevant quantities, like wall heat flux, the flame position and quenching point determination is negligible because the thickening can be retransformed. In general, the interaction with the turbulence is reduced if the flame is artificially thickened.…”

Section: Treatment In the Turbulent Fwi Flowmentioning

confidence: 99%

“…Following Heinrich et al [16], the quenching point y qp is determined by tracking the maximum value of the CO 2 source term, which defines the flame front. Due to the enthalpy losses at the wall, this source term decreases and if it drops under a certain threshold the flame is quenched.…”

Section: Determination Of the Quenching Pointmentioning

confidence: 99%

“…This procedure is analogous to the experimental determination where the OH gradient was used. For this FGM approach, using the CO 2 source term is validated against detailed chemistry simulations and it appears to be the most reliable method [16].…”

Section: Determination Of the Quenching Pointmentioning

confidence: 99%

“…In the experimental setup, a premixed V-shaped flame interacts with a cooled wall under laminar and turbulent conditions. First numerical results for both cases have been already provided by Heinrich et al [16,17] with a highly-resolved (large eddy simulation) LES with DNS-like spatial resolution. The turbulent and laminar cases were compared and analyzed with each other and the experiments.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the Turbulent Near Wall Flame Behavior for a Sidewall Quenching Burner by Means of a Large Eddy Simulation and Tabulated Chemistry

Heinrich

Kuenne

Ganter

et al. 2018

Fluids

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Combustion will play a major part in fulfilling the world’s energy demand in the next 20 years. Therefore, it is necessary to understand the fundamentals of the flame–wall interaction (FWI), which takes place in internal combustion engines or gas turbines. The FWI can increase heat losses, increase pollutant formations and lowers efficiencies. In this work, a Large Eddy Simulation combined with a tabulated chemistry approach is used to investigate the transient near wall behavior of a turbulent premixed stoichiometric methane flame. This sidewall quenching configuration is based on an experimental burner with non-homogeneous turbulence and an actively cooled wall. The burner was used in a previous study for validation purposes. The transient behavior of the movement of the flame tip is analyzed by categorizing it into three different scenarios: an upstream, a downstream and a jump-like upstream movement. The distributions of the wall heat flux, the quenching distance or the detachment of the maximum heat flux and the quenching point are strongly dependent on this movement. The highest heat fluxes appear mostly at the jump-like movement because the flame behaves locally like a head-on quenching flame.

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Numerical Study of Quenching Distances for Side-Wall Quenching Using Detailed Diffusion and Chemistry

Zirwes

Häber

Zhang

et al. 2020

Flow Turbulence Combust

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The numerical investigation of quenching distances in laminar flows is mainly concerned with two setups: head-on quenching (HOQ) and side-wall quenching (SWQ). While most of the numerical work has been conducted for HOQ with good agreement between simulation and experiment, far less analysis has been done for SWQ. Most of the SWQ simulations used simplified diffusion models or reduced chemistry and achieved reasonable agreement with experiments. However, it has been found that quenching distances for the SWQ setup differ from experimental results if detailed diffusion models and chemical reaction mechanisms are employed. Side-wall quenching is investigated numerically in this work with steady-state 2D and 3D simulations of an experimental flame setup. The simulations fully resolve the flame and employ detailed reaction mechanisms as well as molecular diffusion models. The goal is to provide data for the sensitivity of numerical quenching distances to different parameters. Quenching distances are determined based on different markers: chemiluminescent species, temperature and OH iso-surface. The quenching distances and heat fluxes at the cold wall from simulations and measurements agree well qualitatively. However, quenching distances from the simulations are lower than those from the experiments by a constant factor, which is the same for both methane and propane flames and also for a wide range of equivalence ratios and different markers. A systematic study of different influencing factors is performed: Changing the reaction mechanism in the simulation has little impact on the quenching distance, which has been tested with over 20 different reaction mechanisms. Detailed diffusion models like the mixture-averaged diffusion model and multi-component diffusion model with and without Soret effect yield the same quenching distances. By assuming a unity Lewis number, however, quenching distances increase significantly and have better agreement with measurements. This was validated by two different numerical codes (OpenFOAM and FASTEST) and also by 1D head-on quenching simulations (HOQ). Superimposing a fluctuation on the inlet velocity in the simulation also increases the quenching distance on average compared to the reference steady-state case. The inlet velocity profile, temperature boundary condition of the rod and radiation have a negligible effect. Finally, three dimensional simulations are necessary in order to obtain the correct velocity field in the SWQ computations. This however has only a negligible effect on quenching distances.

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3D Numerical Simulation of a Laminar Experimental SWQ Burner with Tabulated Chemistry

Cited by 18 publications

References 28 publications

Pollutants Emissions of CO and Soot from Flame-wall Interactions in Fundamental and Practical Energy Conversion Systems: A Review

Pollutants Emissions of CO and Soot from Flame-wall Interactions in Fundamental and Practical Energy Conversion Systems: A Review

Investigation of the Turbulent Near Wall Flame Behavior for a Sidewall Quenching Burner by Means of a Large Eddy Simulation and Tabulated Chemistry

Numerical Study of Quenching Distances for Side-Wall Quenching Using Detailed Diffusion and Chemistry

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