A Computational Study of the Gas-Solid Suspension Flow through a Supersonic Nozzle
Affiliation(s)
College of Mechanical Engineering & Automation, Zhejiang Sci-Tech University, Hangzhou, China. School of Mechanical Engineering, Andong National University, Andong, Korea.
College of Mechanical Engineering & Automation, Zhejiang Sci-Tech University, Hangzhou, China. School of Mechanical Engineering, Andong National University, Andong, Korea.
ABSTRACT
The present study focuses on numerical simulation of the gas-solid suspension flow in a supersonic nozzle. The Euler- Lagrange approach using a Discrete Phase Model (DPM) has been used to solve the compressible Navier-Stokes equa- tions. A fully implicit finite volume scheme has been employed to discretize the governing equations. Based upon the present CFD results, the particle loading effect on gas-solid suspension flow was investigated. The results show that the presence of particles has a big influence on the gas phase behavior. The structure of shock train, the separation point, and the vortex of the backflow are all related to particle loading. As the particle loading increases the flow characteris- tics behave differently such as 1) the strength of shock train decreases, 2) the separation point moves toward the nozzle exit, 3) the number and strength of vortex increase, 4) the strength of first shock also increases while the other pseudo shocks decreases. The change of gas flow behavior in turn affects the particle distribution. The particles are concen- trated at the shear layers separated from the upper wall surface.
The present study focuses on numerical simulation of the gas-solid suspension flow in a supersonic nozzle. The Euler- Lagrange approach using a Discrete Phase Model (DPM) has been used to solve the compressible Navier-Stokes equa- tions. A fully implicit finite volume scheme has been employed to discretize the governing equations. Based upon the present CFD results, the particle loading effect on gas-solid suspension flow was investigated. The results show that the presence of particles has a big influence on the gas phase behavior. The structure of shock train, the separation point, and the vortex of the backflow are all related to particle loading. As the particle loading increases the flow characteris- tics behave differently such as 1) the strength of shock train decreases, 2) the separation point moves toward the nozzle exit, 3) the number and strength of vortex increase, 4) the strength of first shock also increases while the other pseudo shocks decreases. The change of gas flow behavior in turn affects the particle distribution. The particles are concen- trated at the shear layers separated from the upper wall surface.
Cite this paper
J. Sun, H. Kim, J. Park and Y. Jin, "A Computational Study of the Gas-Solid Suspension Flow through a Supersonic Nozzle," Open Journal of Fluid Dynamics, Vol. 2 No. 4, 2012, pp. 242-247. doi: 10.4236/ojfd.2012.24A028.
J. Sun, H. Kim, J. Park and Y. Jin, "A Computational Study of the Gas-Solid Suspension Flow through a Supersonic Nozzle," Open Journal of Fluid Dynamics, Vol. 2 No. 4, 2012, pp. 242-247. doi: 10.4236/ojfd.2012.24A028.
References
[1] J. H. Geng and H. Groenig, “Dust Suspensions Accelerated by Shock Waves,” Experiments in Fluids, Vol. 28, No. 4, 2000, pp. 360-367. doi:10.1007/s003480050395 [2] L.-S. Fan and C. Zhu, “Principles of Gas-Solid Flows,” Cambridge University Press, Cambridge, 1998. [3] C. T. Crowe, D. F. Elger and J. A. Roberson, “Engineering Fluid Mechanics,” Wiley, Hoboken, 2000. [4] M. A. F. Kendall, “The Delivery of Particulate Vaccines and Drugs to Human Skin with A Practical Hand-held Shock Tube-based System,” Shock Waves, Vol. 12, No. 1, 2002, pp. 23-30. doi:10.1007/s001930200126 [5] M. V. Protasov, A. Yu. Varaksin, T. F. Ivanov and A. F. Polyakov, “Experimental Study of Downward Turbulent Gas-solid Flow in Narrow Pipe,” 4th International symposium on Turbulence, Heat and Mass Transfer, Antalya, 12-17 October 2003, 13 pp. [6] Y.-M. Lee and R. A. Berry, “Analysis of the Two-Phase Flow in a De Laval Spray Nozzle and Exit Plume,” Journal of Thermal Spray Technology, Vol. 3, No. 2, 1994, pp. 179-183. doi:10.1007/BF02648275 [7] M. B. Staki?, G. S. ?ivkovi? and M. A. Sijer?i?, “Numerical Analysis of Discrete Phase Induced Effects on a Gas Flow in a Turbulent Two-Phase Free Jet,” International Journal of Heat and Mass Transfer, Vol. 54, No. 11-12, 2011, pp. 2262-2269. doi:10.1016/j.ijheatmasstransfer.2011.02.039 [8] S. Okuda and W. S. Choi, “Gas-Particle Mixture Flow in Various Types of Convergent-Divergent Nozzle,” Journal of Chemical Engineering of Japan, Vol. 11, No. 6, 1978, pp. 432-438. doi:10.1252/jcej.11.432 [9] R. Gr. Maev and V. Leshchynsky, “Introduction to Low Pressure Gas Dynamic Spray,” John Wiley &Sons, Hoboken, 2009. [10] D. R. Kaushal, T. Thinglas, Y. Tomita, S. Kuchii, H. Tsukamoto, “CFD Modeling for Pipeline Flow of Fine Particles at High Concentration,” International Journal of Multiphase Flow, Vol. 43, 2012, pp. 85-100. doi:10.1016/j.ijmultiphaseflow.2012.03.005
[1] J. H. Geng and H. Groenig, “Dust Suspensions Accelerated by Shock Waves,” Experiments in Fluids, Vol. 28, No. 4, 2000, pp. 360-367. doi:10.1007/s003480050395 [2] L.-S. Fan and C. Zhu, “Principles of Gas-Solid Flows,” Cambridge University Press, Cambridge, 1998. [3] C. T. Crowe, D. F. Elger and J. A. Roberson, “Engineering Fluid Mechanics,” Wiley, Hoboken, 2000. [4] M. A. F. Kendall, “The Delivery of Particulate Vaccines and Drugs to Human Skin with A Practical Hand-held Shock Tube-based System,” Shock Waves, Vol. 12, No. 1, 2002, pp. 23-30. doi:10.1007/s001930200126 [5] M. V. Protasov, A. Yu. Varaksin, T. F. Ivanov and A. F. Polyakov, “Experimental Study of Downward Turbulent Gas-solid Flow in Narrow Pipe,” 4th International symposium on Turbulence, Heat and Mass Transfer, Antalya, 12-17 October 2003, 13 pp. [6] Y.-M. Lee and R. A. Berry, “Analysis of the Two-Phase Flow in a De Laval Spray Nozzle and Exit Plume,” Journal of Thermal Spray Technology, Vol. 3, No. 2, 1994, pp. 179-183. doi:10.1007/BF02648275 [7] M. B. Staki?, G. S. ?ivkovi? and M. A. Sijer?i?, “Numerical Analysis of Discrete Phase Induced Effects on a Gas Flow in a Turbulent Two-Phase Free Jet,” International Journal of Heat and Mass Transfer, Vol. 54, No. 11-12, 2011, pp. 2262-2269. doi:10.1016/j.ijheatmasstransfer.2011.02.039 [8] S. Okuda and W. S. Choi, “Gas-Particle Mixture Flow in Various Types of Convergent-Divergent Nozzle,” Journal of Chemical Engineering of Japan, Vol. 11, No. 6, 1978, pp. 432-438. doi:10.1252/jcej.11.432 [9] R. Gr. Maev and V. Leshchynsky, “Introduction to Low Pressure Gas Dynamic Spray,” John Wiley &Sons, Hoboken, 2009. [10] D. R. Kaushal, T. Thinglas, Y. Tomita, S. Kuchii, H. Tsukamoto, “CFD Modeling for Pipeline Flow of Fine Particles at High Concentration,” International Journal of Multiphase Flow, Vol. 43, 2012, pp. 85-100. doi:10.1016/j.ijmultiphaseflow.2012.03.005