Effects of velocity ratio on dynamics of sand-water coaxial jets

Sharif, Fardin; Azimi, Amir H.

doi:10.1016/j.ijmultiphaseflow.2021.103643

Cited by 13 publications

(1 citation statement)

References 56 publications

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“…Coaxial jets, consisting of an inner round jet surrounded by a concentric outer jet (see Fig. 1a), are widely utilized in the field of energy conversion as an effective method to mix fuel and oxidant streams, e.g., pulverized coal gasification and combustion devices, turbofan and rocket engines [1][2][3]. To achieve the optimal mixing properties of coaxial jets, there is a cross angle or contraction angle (the angle between the inner/outer channel with the axis, see Figs.…”

Section: Introductionmentioning

confidence: 99%

Evolution and Dynamics of the Coherent Vortices in Contraction and Premix Coaxial Jets

Hao

et al. 2022

Chem Eng & Technol

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Contraction and premix coaxial jets are commonly employed in gasification and combustion systems. Understanding the spatial development of coherent structures is a prerequisite to improve the mixing and stability characteristics. The evolution and dynamics of coherent vortices under the contraction and premix coaxial jets are visualized and discussed using flow visualization technology. The contraction configuration increases the instability of the outer shear layer corresponding to an organized rolling up of the outer vortex rings. In the premixed configuration, the earlier interaction between the inner and outer shear layers induces the precocious development of the inner Kelvin-Helmholtz (K-H) vortices. Two empirical equations are proposed to predict the transition length towards a fully turbulent flow.

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Section: Introductionmentioning

confidence: 99%