  The present study aims to investigate the role of injector geometry,
particularly injector tube length to diameter ratio (L/D) in liquid jet
stability and breakup in presence of crossflow. Water is injected into a
crossflow of air. Aerodynamic Weber number (We) and liquid Reynolds number
(Rel) are systematically varied to observe various breakup modes. Bag breakup
and surface stripping is observed for different operating conditions.
Time-resolved jet trajectory images are processed using Proper Orthogonal
Decomposition (POD) algorithm. POD mode shapes and corresponding Power Spectral
Density (PSD) plots are analyzed to study breakup process and probe role of
injector geometry effects. Further, high-resolution images are captured for the
near-nozzle region. Detailed comparison is made for various cases. It is
observed that with increase in (L/D), the jet surface becomes more turbulent
and unstable. This results in early breakup and lower jet penetration
