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CFD Fuel Slosh Modeling of Fluid-Structure Interaction in Spacecraft Propellant Tanks with DiaphragmsLiquid sloshing within spacecraft propellant tanks causes rapid energy dissipation at resonant modes, which can result in attitude destabilization of the vehicle. Identifying resonant slosh modes currently requires experimental testing and mechanical pendulum analogs to characterize the slosh dynamics. Computational Fluid Dynamics (CFD) techniques have recently been validated as an effective tool for simulating fuel slosh within free-surface propellant tanks. Propellant tanks often incorporate an internal flexible diaphragm to separate ullage and propellant which increases modeling complexity. A coupled fluid-structure CFD model is required to capture the damping effects of a flexible diaphragm on the propellant. ANSYS multidisciplinary engineering software employs a coupled solver for analyzing two-way Fluid Structure Interaction (FSI) cases such as the diaphragm propellant tank system. Slosh models generated by ANSYS software are validated by experimental lateral slosh test results. Accurate data correlation would produce an innovative technique for modeling fuel slosh within diaphragm tanks and provide an accurate and efficient tool for identifying resonant modes and the slosh dynamic response.
Document ID
Acquisition Source
Kennedy Space Center
Document Type
Conference Paper
Sances, Dillon J.
(Embry-Riddle Aeronautical Univ. Daytona Beach, FL, United States)
Gangadharan, Sathya N.
(Embry-Riddle Aeronautical Univ. Daytona Beach, FL, United States)
Sudermann, James E.
(NASA Kennedy Space Center Cocoa Beach, FL, United States)
Marsell, Brandon
(NASA Kennedy Space Center Cocoa Beach, FL, United States)
Date Acquired
August 25, 2013
Publication Date
April 12, 2010
Subject Category
Propellants And Fuels
Report/Patent Number
Meeting Information
Meeting: 51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
Location: Orlando, FL
Country: United States
Start Date: April 12, 2010
End Date: April 15, 2010
Sponsors: American Society of Civil Engineers, American Society of Mechanical Engineers, American Society for Composites, American Inst. of Aeronautics and Astronautics, American Helicopter Society, Inc.
Funding Number(s)
Distribution Limits
Public Use Permitted.
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