Temperature, Oxygen, and Soot-Volume-Fraction Measurements in a Turbulent C₂H₄-Fueled Jet Flame

Abstract

We present a detailed set of measurements from a piloted, sooting, turbulent C 2 H 4fueled diffusion flame. Hybrid femtosecond/picosecond coherent anti-Stokes Raman scattering (CARS) is used to monitor temperature and oxygen, while laser-induced incandescence (LII) is applied for imaging of the soot volume fraction in the challenging jet-flame environment at Reynolds number, Re = 20,000. Single-laser shot results are used to map the mean and rms statistics, as well as probability densities. LII data from the soot-growth region of the flame are used to benchmark the soot source term for one-dimensional turbulence (ODT) modeling of this turbulent flame. The ODT code is then used to predict temperature and oxygen fluctuations higher in the soot oxidation region higher in the flame.

Reconstruction Method of 3D Turbulent Flames by Background-Oriented Schlieren Tomography and Analysis of Time Asynchrony

“…The reason is that we have chosen a low premixed flame flow rate compared to the experimental conditions, as it is vital for the time-averaged results of the temperature calculations. In addition, the RMS temperature of the dataset in this paper is much closer to that of the experiment [27]. A good RMS temperature agreement is essential for the time asynchronous analysis.…”

“…Typical combustion times considered in Figure 2 are 0.05 s, 0.075 s, and 0.1 s. The results show that the values of the overall temperature are in the range of 300 to 2200 K, which is consistent with the reference [23]. In order to verify the accuracy of our simulation dataset, we validated the dataset by comparing experiments [27] and simulations [26]. Figure 3 compares experimental and simulation results with the simulation dataset for radial mean and RMS temperature distributions at z/D = 134 and z/D = 165.…”

Fully coupled sectional modelling of soot particle dynamics in a turbulent diffusion flame

“…Results and Discussion3.1. Comparison to ExperimentRadial profiles of predicted means and RMSs of temperatures and the ratio of O 2 and N 2 mole fractions are presented at two axial locations along with experimental data by Kearney et al[34] as illustrated in Fig.1. Results from a recent LES-presumed PDF-sectional model study[4] are also presented where available.…”