Figure 1
From: Unraveling the Geometry Dependence of In-Nozzle Cavitation in High-Pressure Injectors

Spray characteristics for two single-orifice nozzles: R-type and S-type.
(a) and (b) are the schematics of the cross-sectional view of the two nozzles drawn to scale, (c–h) snapshots of time-resolved radiographs of the sprays with 1-ms nominal injection time and at 100 MPa injection pressure, note the field of view was about 5 mm in the jet flow direction by 2 mm in the transverse direction, (i) and( j) time-dependent microscopic spray angles with injection during the entire injection process of about 1.5 ms. The sprays were stable between 500 and 1,000 μs after the start of injection (SOI).