Numerical study for the thrust-vectoring characteristic of dual synthetic jets with unsymmetrical cavities

Based on a whole flow field computational model for dual synthetic jet-X-L model, numerical computations are performed to get the thrust-vectoring characteristic of the dual synthetic jets actuator with unsymmetrical sealed cavities, and the flow field of the actuators with different cavity volume, diaphragm velocity and frequency is analyzed. The results show that when the sealed cavities are unsymmetrical, the direction of the dual synthetic jets is not vertical but gradient, and the degree of the turning can be adjusted by the parameters of the actuator. The mechanism for this is that the relative compressed degree between the cavities by the diaphragm is different, and induces that the energy of the jet and the area of the low pressure between the exits are unsymmetrical, so the dual synthetic jets turn to the side with low energy. The increased of the diaphragm velocity and frequency will augment and reduce the low pressure area separately, the angle of the vectoring is influenced as well.