Effects of Nozzle Inlet Size and Curvature on the Cyclonic Flowfield in a Bidirectional Vortex Chamber Using Velocity Inlet Conditions

Sharma, Gaurav; Majdalani, Joseph

doi:10.2514/6.2022-3324

Cited by 1 publication

(1 citation statement)

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“…On the study of vortex cold-wall combustion chamber, previous research mainly focused on the analysis of the combustion turbulence flow and the optimization structure of the combustor. Sharma and Majdalani 4,5 numerically simulated the effect of jet parameters on cyclonic motion, the results show that the cyclonic motion is independent of the head jet diameter, while the variation of the head jet length and curvature significantly affects the development of the vortex. Khan and Ahmed 6,7 experimentally investigated the tangential jet characteristics, they found that the tangential jets reduce the axial momentum of the airflow and improve the outlet stream characteristics.…”

Section: Introductionmentioning

confidence: 99%

Investigation of turbulent flow in vortex cold-wall combustion chamber under different spark ignition times

Zeng

2023

Proceedings of the Institution of Mechanical Engineers, Part A:

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Hydrogen is used as vortex working medium, a new structure of vortex cold-wall combustion chamber was adopted. Numerical investigation was performed to analyze the turbulent flow under different spark starting times, 2 ms (case 1), 3 ms (case 2), 4 ms (case 3) and 5 ms (case 4). The result shows that in the cold state, a process of disturbance growth and double vortex structure formation is emerged. Except for case 1, the other three cases can successfully ignite the gas mixture in the combustion chamber, the larger the spark ignition time, the greater the probability of successful ignition, the shorter the ignition delay time, and the bigger the pressure peak. For these cases with successful ignition, the flame is mainly concentrated in the inner vortex area, the temperature variation is basically similar, but specie OH shows different variation trend. Considering the probability of successful ignition, ignition delay time and combustion stability, the spark is suitable to start at 3 ms.

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Section: Introductionmentioning

confidence: 99%

Investigation of turbulent flow in vortex cold-wall combustion chamber under different spark ignition times

Zeng

2023

Proceedings of the Institution of Mechanical Engineers, Part A:

View full text Add to dashboard Cite

show abstract

Effects of Nozzle Inlet Size and Curvature on the Cyclonic Flowfield in a Bidirectional Vortex Chamber Using Velocity Inlet Conditions

Cited by 1 publication

References 44 publications

Investigation of turbulent flow in vortex cold-wall combustion chamber under different spark ignition times

Investigation of turbulent flow in vortex cold-wall combustion chamber under different spark ignition times

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