Mixing characteristics of circular and elliptical twin jets

Kumar, Narendra; Sinhamahapatra, K P

doi:10.1201/9781003324539-45

Cited by 3 publications

(2 citation statements)

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“…The present obtained L pc and literature works are presented in Table 1. It is noted from Table 1 that the non-circular jets L pc obtained by the present numerical simulation matches the previous experimental [3][4]10,20,[23][24] and numerical works 29 .…”

Section: Mean Centerline Velocity Decaysupporting

confidence: 86%

“…In addition, the K s of the square jet is similar to the circular jet. Table 2 summarizes this study's results and the spread rates of non-circular jets reported in previous experimental [3][4][9][10]26 and numerical 29 studies. While the spread rate variations among the simulated jets are minimal due to their calculation being confined to the transition region, the geometric virtual origin values exhibit more significant differences, indicating the sensitivity of X s to jet configuration and initial conditions.…”

Section: Jet Half-velocity Width and Spread Ratementioning

confidence: 96%

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Numerical Study on Mixing Characteristics of Circular and Non Circular Jets

Chitimada,

Sinhamahapatra

2024

Def. Sc. J.

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The study of non-circular jet flows has become important due to their various applications such as aircraft exhaust, combustion chambers and injectors. The goal of present paper is to examine the impact of elliptical, square, and triangular shaped orifices on the mixing characteristics of a free jet with Mach number 0.8. Numerical simulations using an SST K-ω two-equation turbulence model were conducted with a Reynolds number of 3.46×105 for all cases. The mean velocity, decay rate, half-velocity width, spread rate, and turbulence intensity of the jet were analysed. The results showed that the triangular orifice provided the best mixing efficiency, with a shorter jet core length. The decay rate was found to be lowest for the square jet and highest for the triangular jet, which matches with the previous research. The asymmetric jets experienced two axis-switching points, while the square jet experienced a 450 rotation of its axes but no axis-switching. The core region had lower turbulence levels, while the highest turbulence levels were in the shear layer.

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