Vibrational CARS thermometry and one-dimensional numerical simulations in CH4/H2/air partially-premixed flames

Satija, Aman; Yuan, Shenli; Naik, Sameer V.; Lucht, Robert P.

doi:10.1016/j.ijhydene.2015.03.151

Cited by 14 publications

(2 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The single-shot precision of the temperature measurement was assessed in laminar flames on a Hencken burner [43] . The single-shot precision was 2% near 20 0 0 K, about 5% near 10 0 0 K, and about 8% at room temperature.…”

Section: Analysis Of Cars Experimental Datamentioning

confidence: 99%

Dual-pump vibrational CARS measurements of temperature and species concentrations in turbulent premixed flames with CO2 addition

Han

Satija

Kim

et al. 2017

Combustion and Flame

Self Cite

View full text Add to dashboard Cite

a b s t r a c tA dual-pump vibrational coherent anti-Stokes Raman scattering (DPVCARS) system was applied for simultaneous temperature and species concentration measurements in jet flames on a newly developed piloted axisymmetric reactor assisted turbulent (PARAT) premixed flame burner. Turbulent lean premixed methane/air round jet flames with varying CO 2 dilution were stabilized using an annular flow of hydrogen at the flame base. Carbon dioxide was injected into the fuel stream to simulate effects of dry exhaust gas recirculation (EGR). The flames were operated at a nearly constant Reynolds number, Lewis number, and adiabatic flame temperature to minimize thermal and transport effects. Velocity boundary conditions at the burner exit were measured using particle image velocimetry. Simultaneous temperature and major species concentrations (O 2 and CO 2 ) were measured along the axial direction at the burner centerline and along the radial direction at representative axial locations above the burner. Progress variables calculated based on the temperatures were used to study the mean flame brush thickness and the turbulent burning velocity. Probability density functions (PDFs) of temperature at various locations are presented and discussed. The DPVCARS measurements provide an experimental database including temperature and turbulent burning velocity for combustion model evaluation and validation and demonstrated a strong potential for flame structure investigation with future improvement on spatial resolution and signal to noise ratio. The merits and limitations of vibrational CARS for diagnostics in turbulent premixed combustion are discussed. The results show that flames with CO 2 addition depart from the universal mean flame brush structure, while their RMS fluctuation values at an identical mean temperature collapse with the undiluted flame. The CO 2 addition increases the combustion intensity with a decrease in turbulent burning velocity when minimizing the thermal and transport effects.

show abstract

Section: Analysis Of Cars Experimental Datamentioning

confidence: 99%

Dual-pump vibrational CARS measurements of temperature and species concentrations in turbulent premixed flames with CO2 addition

Han

Satija

Kim

et al. 2017

Combustion and Flame

Self Cite

View full text Add to dashboard Cite

show abstract

“…11 In a previous publication, we demonstrated the accuracy of VCARS to be better than 2% in Hencken burner calibration flames. 12 Typically, PRCARS is more accurate and sensitive below 800 K, and VCARS is more accurate and has a larger signal-to-noise ratio (S/N) beyond 800 K.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Temperature and Pressure Measurements in Compressible Flow Using Nanosecond O₂ Coherent Anti-Stokes Raman Spectroscopy

Satija

Lucht

2022

Appl Spectrosc

Self Cite

View full text Add to dashboard Cite

Simultaneous pure-rotational (PRCARS) and vibrational (VCARS) O2 CARS spectroscopy was performed at elevated pressure and lowered temperature conditions in non-reacting compressible flow. We applied dual-pump CARS in a three-laser three-color configuration to simultaneously acquire the PRCARS and VCARS spectra of O2. Pure-rotational CARS spectra provides excellent sensitivity to temperature at relatively low temperatures. Pressure was extracted using the differential response of collisional effects in the PRCARS and the VCARS spectra. We used an underexpanded jet outside a choked converging nozzle as the compressible flow-field. We numerically analyze the pressure sensitivity of the combined CARS technique. Finally, we compare the collisional narrowing lineshape models of rotational diffusion narrowing and modified-exponential-gap model, for fitting the experimental spectrum

show abstract

CARS thermometry in laminar sooting ethylene-air co-flow diffusion flames with nitrogen dilution

Satija

Chang

Lowe

et al. 2019

Combustion and Flame

View full text Add to dashboard Cite

Vibrational CARS thermometry and one-dimensional numerical simulations in CH4/H2/air partially-premixed flames

Cited by 14 publications

References 34 publications

Dual-pump vibrational CARS measurements of temperature and species concentrations in turbulent premixed flames with CO2 addition

Dual-pump vibrational CARS measurements of temperature and species concentrations in turbulent premixed flames with CO2 addition

Simultaneous Temperature and Pressure Measurements in Compressible Flow Using Nanosecond O₂ Coherent Anti-Stokes Raman Spectroscopy

CARS thermometry in laminar sooting ethylene-air co-flow diffusion flames with nitrogen dilution

Contact Info

Product

Resources

About

Vibrational CARS thermometry and one-dimensional numerical simulations in CH4/H2/air partially-premixed flames

Cited by 14 publications

References 34 publications

Dual-pump vibrational CARS measurements of temperature and species concentrations in turbulent premixed flames with CO2 addition

Dual-pump vibrational CARS measurements of temperature and species concentrations in turbulent premixed flames with CO2 addition

Simultaneous Temperature and Pressure Measurements in Compressible Flow Using Nanosecond O2 Coherent Anti-Stokes Raman Spectroscopy

CARS thermometry in laminar sooting ethylene-air co-flow diffusion flames with nitrogen dilution

Contact Info

Product

Resources

About

Simultaneous Temperature and Pressure Measurements in Compressible Flow Using Nanosecond O₂ Coherent Anti-Stokes Raman Spectroscopy