Sixty percent of the failures launch vehicles in ascending phase occur propulsion system. Among them, vibration generated by engine is an important factor occurrence failure. At present, health assessment methods aerospace field are mostly for specific equipment, and scholars assess real-time status vehicle engines which can only reflect current vehicle. Existing cannot be applied to different ...

The effect of manufacturing quality on rocket impact point dispersion is analyzed. approach presented here applies to any type rocket. Here, demonstrated for the unguided rocket, and by simulating four typical errors: erroneously manufactured warhead, misalignment between warhead engine chamber, asymmetrically installed propellant, error in nozzle manufacturing. A new methodology proposed, whic...

The feasibility of rebuilding and testing a nuclear thermal rocket (NTR) for the Mars mission has been investigated. Calculations indicate that an NTR would substantially reduce the earth-orbit assembled mass compared to L02/LH2 systems. The mass savings were 36% and 65% for the cases of total aerobraking and of total propulsive braking respectively. Consequently, the cost savings for a single ...

The DLR LUMEN (Liquid Upper stage deMonstrator ENgine) rocket engine comprises of two separate turbopumps, one each for Liquid Oxygen (LOX) and Liquified Natural Gas (LNG) supply. In both an identical bearing block separates the pump section from turbine section. current design, features oil-jet lubrication system to cool lubricate bearings during operation. Cryogenic conditions at pump-interfa...

Coupling of physics in large-scale complex engineering systems must be correctly accounted for during the systems engineering process to ensure no unanticipated behaviors or unintended consequences arise in the system during operation. Structural vibration of large segmented solid rocket motors, known as thrust oscillation, is a well-documented problem that can affect the health and safety of a...