Development of a fan-stirred constant volume combustion chamber and turbulence measurement with PIV

Zhao, Haoran; Wang, Jinhua; Cai, Xiao; Bian, Zhijian; Dai, Hao; Huang, Zuohua

doi:10.1007/s11708-021-0762-z

Cited by 8 publications

(4 citation statements)

References 44 publications

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“…The fan speed had a direct relationship with the turbulence intensity, which is compatible with the description given in refs. [45–47]. The maximum turbulence intensity in this article could reach 2.533 m s −1 .…”

Section: Resultsmentioning

confidence: 76%

“…However, L T increased with the increase of fan speed, which is consistent with the results reported in a previous study. [ 47 ] In addition, the results of Xu et al [ 50 ] also showed that the L T increased with the increase in fan speed. In actuality, L T was likewise zero when the fan speed was zero.…”

Section: Resultsmentioning

confidence: 99%

“…In general, the turbulence field can be considered to be homogeneous when the homogeneity ratio is within the range of 0.8-1.2. [47,51] Figure 4 shows H x in the direction of y = 0 under different pressures and fan speeds. The distribution of homogeneity is comparable to how the turbulence intensity gradually grew from the center to the periphery.…”

Section: Calibration Of the Flow Fieldmentioning

confidence: 99%

“…In general, the turbulence field can be considered isotropic when the isotropic ratio lies within the range of 0.9-1.1. [47,51] Figure 6 shows the isotropic ratio in the whole field of view under different pressures and fan speeds. The majority of the isotropic ratios were focused in the 0.9-1.1 range, demonstrating the isotropy of the turbulence field at various pressures and fan speeds.…”

Section: Calibration Of the Flow Fieldmentioning

confidence: 99%

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Effect of Turbulence and Diffusional–Thermal Instability on Hydrogen‐Rich Syngas Turbulent Premixed Flame

Zhang,

Li,

et al. 2023

Energy Tech

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As a kind of fuel with low‐carbon emissions, hydrogen‐rich syngas has a large resource potential and is a promising alternative energy resource. A series of experiments in a constant volume combustion bomb are carried out to investigate the effects of turbulence and diffusional–thermal (DT) instability on a hydrogen‐rich syngas turbulent premixed flame. The flow field in the constant volume combustion bomb is calibrated, and the turbulent flow field's homogeneity and isotropy were investigated. The effects of different speeds of fan (1366–4273 rpm), hydrogen fractions (55%–95%), pressures (1.0–3.0 bar), and equivalence ratios (0.6–1.0) on the hydrogen‐rich syngas turbulent premixed flame are studied. According to the analyses, the flow field in the experimental device exhibits good homogeneous and isotropic characteristics. With the increase of turbulence intensity, equivalence ratio, hydrogen fraction, or pressure, the turbulent flame propagation speed increases gradually. As the hydrogen fraction increases or the equivalence ratio decreases, the effective Lewis number decreases, and the effect of DT instability on the flame increases. The research in this article is crucial for the clean and efficient utilization of hydrogen‐rich syngas and the design of related burners.

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Section: Resultsmentioning

confidence: 76%

Section: Resultsmentioning

confidence: 99%

Section: Calibration Of the Flow Fieldmentioning

confidence: 99%

Section: Calibration Of the Flow Fieldmentioning

confidence: 99%

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