New Generation of Synthetic Jet Actuators

摘要

A new generation of SJA is provided. It consists of two cavities bounded on one end by a single PZT-diaphragm with two exit slots and a slide block. In the new SJA concept, two adjacent jets are established downstream of the two exit slots and are driven by the motion of the same PZT-diaphragm. The slide block regulates the two jets and then the two adjacent jets merge into a single, larger synthetic jet. The novelties of the new generation of SJA are that the two cavities share the same wall equipped with a PZT-diaphragm and the slide block regulates the two synthetic jets. These novelties bring the major advantages and functions of this new SJA that the existing SJAs do not have. The new SJA may not only double the function of the existing SJAs with a single diaphragm but also resolve the problems of pressure loading and energy inefficiency of the existing SJAs. The slide block of the new SJA has an important regulating function and different types of synthetic jets can be generated with slight modifications of the slide block. These indicate that the new SJA may potentially replace the existing SJA in various applications and also extend the applications of the SJAs to more flow control systems that cannot be implemented by the existing SJAs. To promote the applications of the new generation of SJA, future work is required. This includes a groundwork study on the characteristics of the new generation of SJA in a crossflow and the control rules of the new generation of SJA adjusted due to the slide block.