Large Eddy Simulation of Two-Phase Mixing Layer Flows in the Scramjet

Abstract:

To study the dispersion of fuel droplets in the supersonic flow and reveal the momentum and heat exchanges between two phases, a large eddy simulation (LES) and particle Lagrangian tracking model were employed to numerically simulate two-phase mixing layer flows, using the one-way coupling method. The velocity fluctuation disturbances were added to inspire the flow instabilities. The motions of droplets in different diameters and droplets’ response to the large scale eddies were analyzed. The results indicated that droplets of 1micro diameter below are corresponded with the motions of coherent vortexes in the mixing layer. The more intense momentum and heat exchange are performed with decreasing the droplet’s diameter. The well mixing of fuel droplets in turbulence would make the combustion preparedness more sufficient. The research conclusions are of important academic value for further analyzing the two-phase dynamics in the scramjet.

• Periodical: Applied Mechanics and Materials (Volumes 249-250)
• Pages: 428-433
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.249-250.428
• Online since: December 2012
• Authors: Zhao Xin Ren, Bing Wang, Hui Qiang Zhang
• Keywords: Droplets, Lagrangian Trajectory Model, Large Eddy Simulation (LES), Mixing Layer, Two-Phase Flow

References

[1] Franklin Génin, Suresh Menon, Simulation of Turbulent Mixing Behind a Strut Injector in Supersonic Flow, AIAA Journal. 48 (2010) 526-539.

DOI: 10.2514/1.43647

[2] Wu H Y, Wang Y, Sun M B, Large eddy simulation of two-phase mixing layer with droplets, Journal of Propulsion Technology. 30 (2010) 24-29. (in Chinese).

[3] Ren Y X, Liu M, Zhang H X. A characteristic-wise hybrid compact-WENO scheme for solving hypersonic conservation laws. J. Comput. Phys. 192 (2003) 365-386.

DOI: 10.1016/j.jcp.2003.07.006

[4] Xue S Y, Zhang H Q, Wang B, Wang L X, Most-unstable wave method for inlet disturbances of spatially developing supersonic mixing layers. Journal of Tsinghua University(Scinence and Technology), 5 (2011) 724-729. (in Chinese).

[5] Goebel S G, Dutton J C, Experimental study of turbulent compressible mixing layers, AIAA Journal. 29 (1992) 538-546.

DOI: 10.2514/3.10617

[6] B. Arcen, A. Taniére, M. Khalij, Heat transfer in a turbulent particle-laden channel flow, Int. J. of Heat and Mass Transfer. 1 (2012) 1-41.

DOI: 10.1016/j.ijheatmasstransfer.2012.06.058

[7] Ansari A, Strang W Z, Large-eddy simulation of turbulent mixing layers, AIAA Paper 1996-0684.

[8] B. Abramzon, W.A. Sirignano, Droplet vaporization model for spraycombustion calculations, AI AA Paper 88-0636.

[9] Vreman A W, Sandham N D, Luo K H, Compressible mixing layer growth rate and turbulence characteristics, J Fluid Mech. 320 (1996) 235-258.

DOI: 10.1017/s0022112096007525

[10] L.A. Oliveira, V.A.F. Costa, B.R. Baliga, A Lagrangian–Eulerian model of particle dispersion in a turbulent plane mixing layer, Int. J. Numer. Meth. Fluids. 40 (2002) 639–653.

DOI: 10.1002/fld.366

[11] P.K. Yeung, Lagrangian investigation of turbulence, Annu. Rev. Fluid Mech. 34 (2002) 115-142.