Gas mixing in cylindrical chambers after radial jets injection

Nirmolo, A.; Woche, Hermann; Specht, Eckehard; Praetor, Ralf; Skroch, R.

doi:10.1504/pcfd.2007.015777

Cited by 2 publications

(3 citation statements)

References 7 publications

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“…The robustness and the stability of the standard k-e model must be taken into account, which is sufficiently accurate to be used for all CFD calculations. For verification and validation of the CFD calculations such as using different turbulence models, combustion parameters, etc., see Nirmolo [8][9][10]. The results are in good agreement with other numerical results and experiments.…”

Section: Cfd Calculationssupporting

confidence: 85%

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Mixing of Jets in Cross Flow after Double Rows of Radial Injections

Nirmolo¹,

Woche

Specht

2008

Chem Eng & Technol

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Multiple rows of jets injected into a cross flow with diameters of 0.3 to 3 m were studied experimentally and numerically. The measured values were in good agreement with CFD calculations. The optimum mixing for a single row was obtained at a normalized momentum flux ratio (J/n 2 ) of 0.3 with a penetration depth (h/R) of 0.6, which is in accordance with previous studies. This condition is valid for all numbers of nozzles. However, increasing the number of nozzles will also improve the mixing quality. Double rows with a staggered arrangement always give a worse mixing quality, compared to a single row. Double rows with an inline arrangement will improve the mixing quality only if the injected volumetric flows produce over-and under-penetrated jets for a V : jo1 /V : jo2 ratio of 3/1 or 1/3. For operation under ever changing conditions a single row with J/n 2 > 0.3 and n ≥ 24 is recommended.

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Section: Cfd Calculationssupporting

confidence: 85%

“…Both the scattering of the measured values and the CFD results show similar tendencies. For more examples of comparison of calculated and computed values, see Nirmolo [8][9][10]. The results are in good agreement with other CFD codes and experiments.…”

Section: Comparison With Experimentssupporting

confidence: 75%

Mixing of Jets in Cross Flow after Double Rows of Radial Injections

Nirmolo¹,

Woche

Specht

2008

Chem Eng & Technol

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“…They predicted a reduction of viscous sub layer thickness due to side mass injection flow. Nirmolo [38] studied the multiple jets radially injected inwardly from a cylindrical chamber wall and outwardly from a chamber centerline into a cross-flow by experimental method and numerically using FLUENT-CFD code. The chamber diameter was varied from 0.3m to 3.0m and the number of nozzles from 4 to 32.The authors Beheshti, Ghorbanian, Farhanieh, Teixeira and Ivey [39] evaluated the stability margin with various mass flow rates and angles of injection in an axial compressor.…”

Section: Introductionmentioning

confidence: 99%

Effects of Cross Jet on Turbulent Main Stream Flow in A Non-Circular Elbow – A Numerical Approach

Debnath¹,

Bhattacharjee

Mandal³

et al. 2020

1790-5044

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The performance of fluid transportation model through non-circular elbow ducts with wall mass injection in predicting the velocity and pressure fields is important in Industrial applications. The present work pertains to the two-dimensional numerical analysis of the developing turbulent fluid flow with uniform mass injection through the top wall of a rectangular elbow. A numerical experimentation using control volume formulation considering standard k   turbulence model has been conducted to study different parameters like the velocity distributions, size and shape of the recirculation bubble as well as the friction factor etc. The size and strength of the recirculation bubbles generated in the bend regions are affected by the continuous entry of mass injected through the wall of the elbow. The results show that the velocity field, reattachment points, friction factor etc. are influenced by the side mass injection. The recirculation bubble has been observed to diminish in size by the injection of mass with corresponding changes in the velocity and the friction factors.

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Gas mixing in cylindrical chambers after radial jets injection

Cited by 2 publications

References 7 publications

Mixing of Jets in Cross Flow after Double Rows of Radial Injections

Mixing of Jets in Cross Flow after Double Rows of Radial Injections

Effects of Cross Jet on Turbulent Main Stream Flow in A Non-Circular Elbow – A Numerical Approach

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