Simultaneous 10 kHz three-dimensional CH2O and tomographic PIV measurements in a lifted partially-premixed jet flame

Zhou，Bo1,2; Li，Tao3; Frank，Jonathan H.1; Dreizler，Andreas3; Böhm，Benjamin3

2020

10.1016/j.proci.2020.07.039

PROCEEDINGS OF THE COMBUSTION INSTITUTE   影响因子和分区

1540-7489

High-speed, three-dimensional (3D) scalar-velocity field measurements are demonstrated in a lifted partially-premixed dimethyl-ether/air jet flame using simultaneous laser-induced fluorescence (LIF) of formaldehyde (CHO) and tomographic particle image velocimetry (TPIV). The 3D LIF measurements are performed by raster scanning the laser beam from a 100 kHz pulse-burst laser across the probe volume using an acousto-optic deflector. The volumetric reconstruction of the LIF signal from ten parallel planes provides quasi-instantaneous 3D LIF measurements that are synchronized with 10 kHz TPIV measurements. The temporally resolved CHO-LIF and velocity field data are used to analyze Lagrangian particle trajectories and displacement speeds at the base of the lifted flame. The particle trajectories reveal flow structures that are difficult to observe in an Eulerian reference frame. Positive and negative displacement speeds are observed at the CHO-LIF surfaces at the inner and outer regions of the jet flame with a maximum displacement speed of approximately eight times the laminar flame speed of a stoichiometric dimethyl-ether/air mixture. The observations in present study support formation of lean premixed flames near the flame base whose role in flame stabilization should be investigated in more detail.

3D displacement speed High-speed 3D CH2O-LIF High-speed TPIV Lagrange particle trajectory Turbulent lifted jet flame

EI

英语

其他

20203909252052

Fluid Flow, General:631.1 ; Laser Beam Interactions:744.8 ; Imaging Techniques:746 ; Organic Compounds:804.1 ; Special Purpose Instruments:943.3

ENGINEERING

2-s2.0-85091496678

Scopus

1.Combustion Research Facility, Sandia National Laboratories, Livermore, CA 94551, USA
2.Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, PR China
3.Technical University of Darmstadt, Department of Mechanical Engineering, Reactive Flows and Diagnostics, Otto-Berndt-Str. 3, 64287 Darmstadt, Germany

Zhou，Bo,Li，Tao,Frank，Jonathan H.,et al. Simultaneous 10 kHz three-dimensional CH2O and tomographic PIV measurements in a lifted partially-premixed jet flame[J]. PROCEEDINGS OF THE COMBUSTION INSTITUTE,2020,38:1675-1683.

Zhou，Bo,Li，Tao,Frank，Jonathan H.,Dreizler，Andreas,&Böhm，Benjamin.(2020).Simultaneous 10 kHz three-dimensional CH2O and tomographic PIV measurements in a lifted partially-premixed jet flame.PROCEEDINGS OF THE COMBUSTION INSTITUTE,38,1675-1683.

Zhou，Bo,et al."Simultaneous 10 kHz three-dimensional CH2O and tomographic PIV measurements in a lifted partially-premixed jet flame".PROCEEDINGS OF THE COMBUSTION INSTITUTE 38(2020):1675-1683.