Characteristics of a Hydrogen Jet in Supersonic Crossflow

The effect of jet-to-crossflow momentum flux ratios (J) on the flow properties of a non-reacting transverse jet injected into a high-speed crossflow is explored using a three-dimensional Reynolds-averaged Navier–Stokes equation (RANS). The supersonic freestream Mach number is taken as 2.43, and three different values of jet-to-cross flow momentum flux ratios are investigated: J = 0.71, 2.71, and 5. A density-based rhoCentralFoam solver from OpenFOAM® is modified to accommodate the species transport for the present study. The solver is validated using jet penetration height into the crossflow, and an excellent agreement with the experimental results is achieved. Our studies show that the smaller J value shows superior fuel-air mixing; however, the jet penetration into the freestream was shorter compared to larger J values. This results in minimal blocking of the freestream and thus reduces overall total pressure loss. At the same time, the fuel jet penetration reduces as the value of J decreases.