Accession Number:

ADA261671

Title:

Investigation of Liquid Sloshing in Spin-Stabilized Satellites.

Descriptive Note:

Final rept. 1 Jul 1989-30 Nov 1992,

Corporate Author:

IOWA STATE UNIV AMES DEPT OF MECHANICAL ENGINEERING

Report Date:

1993-01-31

Pagination or Media Count:

214.0

Abstract:

Several spin-stabilized communication satellites with liquid stores on board have exhibited unstable nutational motion. Liquid sloshing is suspected as the cause of this undesirable behavior. During an initial three year grant period, a test rig was built and instrumented, a rigid body computer model was developed using a pendulum analogy to simulate the sloshing liquid, and computational fluid dynamic CFD methods were used to develop a primitive variable numerical algorithm to describe two and three dimensional liquid sloshing. During the current three year grant period, the test rig and rigid body computer model have been used to study the effect of various physical parameter values on the motion, and stability conditions have been determined. The structural mathematical model has been improved by introduction of finite element techniques to account for elastic deformation of the test rig, and an implicit-explicit numerical approach has been implemented to solve the coupled, nonlinear equations of motion.

Subject Categories:

  • Fluid Mechanics
  • Unmanned Spacecraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE