Variable Frequency Diverter Actuation for Flow Control

Dennis Culley
2006 3rd AIAA Flow Control Conference   unpublished
E-mail your question via the Internet to help@sti.nasa.gov • Fax your question to the NASA STI Help Desk at 301-621-0134 • Telephone the NASA STI Help Desk at 301-621-0390 • Write to: NASA STI Help Desk Level of Review: This material has been technically reviewed by technical management. This report contains preliminary findings, subject to revision as analysis proceeds. The design and development of an actively controlled fluidic actuator for flow control applications is explored. The basic
more » ... lored. The basic device, with one input and two output channels, takes advantage of the Coanda effect to force a fluid jet to adhere to one of two axi-symmetric surfaces. The resultant flow is bi-stable, producing a constant flow from one output channel, until a disturbance force applied at the control point causes the flow to switch to the alternate output channel. By properly applying active control the output flows can be manipulated to provide a high degree of modulation over a wide and variable range of frequency and duty cycle. In this study the momentary operative force is applied by small, high speed isolation valves of which several different types are examined. The active fluidic diverter actuator is shown to work in several configurations including that in which the operator valves are referenced to atmosphere as well as to a source common with the power stream. Abstract NASA/TM-2006-214396 REPORT DOCUMENTATION PAGE REPORT DATE SECURITY CLASSIFICATION OF ABSTRACT SECURITY CLASSIFICATION OF THIS PAGE Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188), Washington, DC 20503.
doi:10.2514/6.2006-3034 fatcat:5yfywcqeqbextc25mteb3eroei