Author(s)

Nao Kuniyoshi¹, Minoru Yaga²

¹Department of Marine Electronics and Mechanical Engineering, Tokyo University of Marine Science and Technology, Koto-ku, Japan.
²Department of Mechanical Systems Engineering, University of the Ryukyus, Nishihara, Japan.

As one of supersonic mixing techniques, a supersonic mixing technique using a cavity and a porous wall has been proposed. The cavity and the porous wall generate the low speed region in the cavity, which enhances mixing the main flow with the jets. In this study, numerical simulations were conducted to clarify the effects of backward inclined jets on the mixing technique using a porous wall and a cavity. In the numerical simulations, three patterns of jet injections which combined normal jets with backward inclined jets were studied. As a result, the combination of a backward inclined jet and a normal jet generates the suction flow behind the backward inclined jet, which is useful for making the injected jets flow into the cavity. In addition, the introduction of backward inclined jets reduces the total pressure loss. On the other hand, the mass flow rate through the porous holes decreases with increase in the number of the backward inclined jets.

Supersonic Mixing, Cavity, Porous Wall, Backward Inclined Jet

Kuniyoshi, N. and Yaga, M. (2017) Numerical Simulation of Interaction between Supersonic Flow and Backward Inclined Jets Surrounded by Porous Cavity. Open Journal of Fluid Dynamics, 7, 276-287. doi: 10.4236/ojfd.2017.73018.