NUMERICAL INVESTIGATION OF PARTICLE MOTION IN SUPERSONIC FLOWS

NUMERICAL INVESTIGATION OF PARTICLE MOTION IN SUPERSONIC FLOWS

Sakamaki, R.; Suzuki, M.; Yamamoto, M.

Full Article:

Gas-particle two-phase flow is very important to clarify phenomena inside of various fluid machines. A number of reserches have been performed on gas-particle two-phase flows. However, particle motion in a supersonic flow has not been clarified sufficiently. Therefore, in order to find out the interactions between flow and particles, the authors focus on the characteristics of particle motion, especially the velocity and temperature. In the pre-sent study, a conventional converging-diverging supersonic nozzle is employed as our target. For the gas phase, the turbulent flow in the nozzle is computed with the finite difference and RANS methods. For the particle phase, the particle motion is simulated in a Lagrangian man-ner. In addition, taking into account the light particle loading, a weak coupling method is employed. Through this investigation, we show that the particle velocity increases monoton-ically from the nozzle throat to the outlet. And it is shown that particles can be accelerated to higher velocities in helium than in nitrogen, and smaller particles tend to attain higher speed and lower static temperature.

Gas-particle two-phase flow is very important to clarify phenomena inside of various fluid machines. A number of reserches have been performed on gas-particle two-phase flows. However, particle motion in a supersonic flow has not been clarified sufficiently. Therefore, in order to find out the interactions between flow and particles, the authors focus on the characteristics of particle motion, especially the velocity and temperature. In the pre-sent study, a conventional converging-diverging supersonic nozzle is employed as our target. For the gas phase, the turbulent flow in the nozzle is computed with the finite difference and RANS methods. For the particle phase, the particle motion is simulated in a Lagrangian man-ner. In addition, taking into account the light particle loading, a weak coupling method is employed. Through this investigation, we show that the particle velocity increases monoton-ically from the nozzle throat to the outlet. And it is shown that particles can be accelerated to higher velocities in helium than in nitrogen, and smaller particles tend to attain higher speed and lower static temperature.

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DOI: 10.5151/meceng-wccm2012-19048

Referências bibliográficas

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Como citar:

Sakamaki, R.; Suzuki, M.; Yamamoto, M.; "NUMERICAL INVESTIGATION OF PARTICLE MOTION IN SUPERSONIC FLOWS", p-2843-2853. In: In Proceedings of the 10th World Congress on Computational Mechanics [= Blucher Mechanical Engineering Proceedings, v. 1, n. 1]. São Paulo: Blucher, 2014.
ISSN 23580828, DOI 10.5151/meceng-wccm2012-19048