3D velocity and temperature distribution measurement and characteristic analysis of swirling combustion

Su, Yi; Zhang, Bin; Chen, Yifeng; Sui, Chunjie; Chen, Wei

doi:10.1016/j.measurement.2022.110949

Cited by 13 publications

(1 citation statement)

References 24 publications

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“…The reconstruction algorithm is then used to invert the two-dimensional (2D) refractive index distribution within the cross sections. Parameter distributions, such as density and temperature, can also be obtained [20][21][22]. The precision of the refractive index measurement is 10 −5 .…”

Section: Deflection Tomography Temperature Measurementmentioning

confidence: 99%

Flame and emission characteristics from NH3/CH4 combustion under ultrasonic excitation

Chen

Sui

et al. 2023

THERM SCI

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As a high energy density hydrogen-rich carrier, ammonia (NH3) is a highly promising carbon-free fuel. The large-scale industrial application of NH3 is limited by its low reactivity and high nitrogen oxide (NOX) emission. In this work, the flame and emission characteristics of ammonia/methane (NH3/CH4) non-premixed combustion were investigated under ultrasonic excitation. An experimental system was designed and built, including non-premixed combustion system, loading ultrasonic system, deflection tomography temperature measurement system and flue gas measurement system. Combustion and measurement experiments at different ultrasonic frequencies and NH3/CH4 blending ratios were carried out. Flame images and flue gas species concentrations under ultrasonic excitation were acquired. The 3D temperature field was reconstructed. The influence of ultrasonic excitation at different frequencies on flame characteristics, flame temperature field and emission characteristics of the combustion process was analysed. The mechanism of NH3/CH4 combustion enhancement and emission reduction was revealed when the flame was excited by ultrasonic waves. Results showed that part of the hydrocarbon fuels was replaced by NH3 to reduce carbon dioxide (CO2) emission. The height and colour of the NH3/CH4 flame were changed and the high-temperature area of the flame gradually expanded as ultrasonic acted on the flame. As ultrasonic frequency increased, the emission concentrations of unburned CH4, unburned NH3 and NO decreased significantly. The flame was excited by ultrasonic waves, which reduced its local equivalent ratio, improved combustion efficiency and suppressed NOX generation.

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Section: Deflection Tomography Temperature Measurementmentioning

confidence: 99%

Flame and emission characteristics from NH3/CH4 combustion under ultrasonic excitation

Chen

Sui

et al. 2023

THERM SCI

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3D velocity field reconstruction of gas-liquid two-phase flow based on space-time multi-scale binocular-PIV technology

Wang

Dou

Zhang

et al. 2022

Optoelectron. Lett.

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for particle image velocimetry (PIV) technique, the two-dimensional (2D) PIV by one camera can only obtain 2D velocity field, while three-dimensional (3D) PIV based on tomography by three or four cameras is always complex and expensive. In this work, a binocular-PIV technology based on two cameras was proposed to reconstruct the 3D velocity field of gas-liquid two-phase flow, which is a combination of the binocular stereo vision and cross-correlation based on fast Fourier transform (CC-FFT). The depth of particle was calculated by binocular stereo vision on space scale, and the plane displacement of particles was acquired by CC-FFT on time scale. Experimental results have proved the effectiveness of the proposed method in 3D reconstruction of velocity field for gas-liquid two-phase flow.

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A simultaneous non-invasive diagnosis method for flame temperature and velocity fields based on radiation self-calibration and optical flow

Chen,

Shen,

Xie

et al. 2024

Case Studies in Thermal Engineering

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3D velocity and temperature distribution measurement and characteristic analysis of swirling combustion

Cited by 13 publications

References 24 publications

Flame and emission characteristics from NH3/CH4 combustion under ultrasonic excitation

Flame and emission characteristics from NH3/CH4 combustion under ultrasonic excitation

3D velocity field reconstruction of gas-liquid two-phase flow based on space-time multi-scale binocular-PIV technology

A simultaneous non-invasive diagnosis method for flame temperature and velocity fields based on radiation self-calibration and optical flow

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