Numerical simulation and mechanism investigation on equidirectional fuel-air/oxygen mixing enhanced by synthetic jet actuators

The overall flow field calculation model(X-L) which takes actuator cavity, exit throat and exterior flow field as a single computational region was established. Based on the calculation model, equidirectional fuel-air/oxygen mixing flow field enhanced by synthetic jet actuators was numerically simulated and investigated. The result showed that synthetic jet actuators can significantly enhance fuel-air/oxygen mixing. The main mechanism is that synthetic jet actuators controlling flow direction of fuel-air/oxygen enable the two oxygen parallel jet on both sides to deflect inwards, so as to greatly shorten core region length of every jet; at the same time, actuators alter and strengthen the vortex structure near the jet exit, and the strong convection action of the vortex structure significanfly enhances fuel-air/oxygen parallel jet mixing near the exit.