Method and apparatus for reducing acoustic noise in a synthetic jet

摘要

A synthetic jet includes a first backer structure and a first actuator coupled to the first backer structure to form a first composite unit. The synthetic jet also includes a second backer structure, and a second actuator coupled to the second backer structure to form a second composite unit. A wall member is coupled to and positioned between the first and second backer structures to form a cavity. The first composite unit has an orifice formed therethrough and the orifice is fluidically coupled to the cavity and fluidically coupled to an environment external to the cavity.

主权项

id="REI-00003" date="20160517" 1. A method of fabricating a synthetic jet comprising:
attaching two plates to a wall to encircle a volume; coupling a first micromechanical device to one of the two plates to form a first unitary member; coupling a second micromechanical device to the other of the two plates to form a second unitary member; penetrating an orifice through both the first micromechanical device and the plate coupled thereto to fluidically couple the volume to a gas outside the volume; and coupling a first controller to the first unitary member, wherein the first controller is configured to operate the first unitary member at a first frequency and to operate the second unitary member at a second frequency that is different from the first frequency.