Slosh dynamics in a toroidal tank

An investigation is described of fluid slosh dynamics in a -scale model of a toroidal liquid oxygen tank for a minimum-length orbit transfer vehicle. Experimentally and analytically derived equivalent mechanical models for the slosh modes under a 1-g acceleration are compared. Measurements of the reductions in slosh forces obtained with slosh baffles are presented, and equivalent mechanical models for the slosh modes with baffles installed are derived. A methodology is given for the efficient measurement of slosh dynamics by digital spectral analysis. Observations of nonlinear effects in the slosh motions are described.