Supersonic Jet Entrainment Manipulation and Scaling Using Multiple Steady Minijets

What is it about?

We studied how to control the mixing of a supersonic jet (with a design Mach number of 1.8) using 1 to 6 smaller minijets, and found a simplified pattern. The length of the supersonic jet's core (a key measure of how quickly the jet mixes) depends on many factors, such as the size ratio of the main jet to minijets, the number of minijets, and their mass flow rate ratio. However, our experiments showed that these complex relationships can be described by a single scaling factor. This one factor effectively predicts changes in the jet's core length, making the control and design of supersonic jets simpler.

Featured Image