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In-Line Electromagnetic Actuator for Fuel ModulationAn in-line electromagnetic actuator with normally-open configuration has been developed for the purpose of exploring its application as a fuel modulator for the active control of combustor thermo-acoustic instabilities. The actuator is based on the spring-coil-plunger mechanism with the plunger designed to be suspended by crossed cantilever beam springs. Operational specification was set for a 1000 psi maximum inlet fuel pressure and modulation for a broad frequency bandwidth that encompasses frequencies that are typically associated with combustor thermo-acoustic instabilities. Various test results demonstrated fuel modulation up to 1200 Hz for coil excitation voltage between 2.3 and 4.6 V and current between 16 and 48 mA, respectively. The initial goal of this work was to demonstrate fuel modulation based on the concept of a normally-open fuel modulator with tethered plunger displacement.
Document ID
Document Type
Conference Paper
Okojie, Robert S.
(NASA Glenn Research Center Cleveland, OH, United States)
Chang, Carl W.
(Vantage Partners, LLC Cleveland, OH, United States)
Meredith, Roger D.
(NASA Glenn Research Center Cleveland, OH, United States)
Thomas, Randy
(NASA Glenn Research Center Cleveland, OH, United States)
Kopasakis, George
(NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
October 9, 2018
Publication Date
July 9, 2018
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
Meeting Information
Meeting: AIAA Propulsion and Energy Forum
Location: Cincinnati, OH
Country: United States
Start Date: July 9, 2018
End Date: July 11, 2018
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 109492.
Distribution Limits
Public Use Permitted.
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