Recent Experimental Efforts on High-Pressure Supercritical Injection for Liquid Rockets and Their Implications

Figure 16

Binary coaxial liquid N₂/GHe system at (A) chamber pressure of 1.0 MPa, (B) chamber pressure of 6.0 MPa. Inner-tube hole diameter, 𝑑_LN2=1.9mm; liquid nitrogen injection velocity, 𝑣_LN2=5m/s; helium gas injection velocity, 𝑣_He=100m/s; liquid nitrogen injection temperature, 𝑇_LN2=97K; gaseous helium injection temperature, 𝑇_He=280K (from Telaar et al. [41]).