Kratos: Rocket Booster Separation from a UAV Using Simcenter STAR-CCM+

Siemens Visionary Siemens Visionary
Siemens Visionary

The information below was gathered from the 2018 Simcenter Conference - Americas that took place October 15-17 in Detroit, Michigan.




Author: Tom Barnett, Aerodynamics, CFD and Configuration Design


A UAV is launched via multiple rocket boosters.  The booster pack must separate safely from the UAV without striking the vehicle.  Physics-based prediction models were made to analyze the separation trajectory.  An unsteady Simcenter STAR-CCM+ analysis was performed to validate the prediction model. The simulation analysis used Overset Meshing and Dynamic Fluid-Body Interaction to analyze the trajectory.  Both the prediction model and the unsteady simulation show the booster pack will separate cleanly from the Air Vehicle.  The Simcenter STAR-CCM+ model increased the confidence of internal and external customers that the UAV will launch safely.  To aid in the analysis, java and PBS scripts were used in conjunction to develop a recursive method of submitting jobs to HPC as a workaround during periods of heavy computing resource usage.