In order to start the main engine of an upper stage it is necessary to position the liquid propellant stable above the tank outlet. Accordingly, supplying the thrusters with gas- and vapor-free propellant is a further fundamental criterion. mehr...

Considering the importance of satellites in the today’s time it is of interest to improve their functionality. The satellites in orbit must correct their positions in certain time intervals, so it is necessary to optimize the engines fuel supply and further win pay load mass. mehr...

The equilibrium free surface of a liquid in a partly filled circular cylinder under the action of surface and gravitational forces is determined by the static contact-angle and liquid volume and may be expressed as a function of the bond number Bo. mehr...

Knowledge of the dynamic behaviour of cryogenic fluids under the influence of abrupt accelerations changes and heat fluxes is of key importance for cryogenic propellant management in space vehicles. mehr...

On earth and in space alike, the quality of combustion depends on the quality of fuel. Bubbles that can enter the fuel for example by sloshing would significantly diminish this quality and must therefore be avoided. mehr...

When you are now moving the cup carefully back and forth then you will recognize that the free surface of your coffee is no longer horizontal but it is oscillating up and down perpendicular to the excitation direction. mehr...