JOINT TWO-DIMENSIONAL DROPLET/GAS VELOCITY MAPPING FOR SUPERSONIC RAMJET APPLICATIONS

The thrust of the proposed research is to research and develop a 2-D joint measurement scheme for simultaneously measuring the droplet and gas velocities to enhance the understanding of the droplet-turbulence interactions. A Particle Image Velocimeter (PIV) for measuring the droplet velocity will be jointly implemented with an OH-Flow-Tagging Velocimeter for measuring the gas velocity. The proposed 2-D measurement technique is suitable for the operation conditions of high temperature and high level of vibration typically encountered in shock tunnel and ramjet research facility. For the routing operation of the above system, the re-calibration is not required and the system maintenance is minimum. The hardware and software associated with this system can also be converted for the 2-D measurement of species concentration, density, and temperature. The research and development of such a system will make a useful contribution to the study of supersonic fuel injection involving multiple phases and their interaction mechanisms.