Hydraulic behaviour of the Geul inverted siphon: Energy losses, debris accumulation and applicability of a Minimum Energy Loss culvert

In the area of Bunde in the south of Limburg, the Netherlands, the Geul river flows beneath the Juliana Canal through an inverted siphon before reaching the Meuse. During July 2021 a large scale flood event occurred, showing an insufficient capacity of the inverted siphon when both the Geul and Meuse had high water levels.<br/><br/>Such...

Active small-scale space debris removal by a space-based laser

Space debris objects with sizes between 1 and 10 cm form the greatest risks for creating new collisions with active spacecraft as they are too small to track and too large to be shielded against. This research has simulated the performance of a space-based laser system on the removal of these small-scale debris objects. The selected system is...

Graveyard Orbits Around Mars

Mars is expected to become a focal point of exploration (human and robotic) in the near future. Extensive operations and continued human presence on the planet would require a robust space infrastructure. Be it navigation satellite constellations or scientific missions in low Mars orbits (LMO) and Areosynchronous orbits (ASO), every satellite...

Feasibility Study and Design of Soft-Catcher for Damaged Concrete Debris

In an accidental explosion of ammunition magazine, concrete debris throw hazard is a major safety concern. The current approach to collect explosively-damaged debris after test does not yield representative test data on debris launch condition. This research is initiated to study the possibilities of using polymeric foam material to soft-catch...