During the ascent of carrier rockets, the massively separated flow in the base region generates highly unsteady wall pressure fluctuations. The resulting dynamic loads can induce a response of the launcher structure called buffeting. To study the characteristics of the base flow behind three different configurations of the Ariane 5 launcher, improved delayed detached-eddy simulation in combination with unstructured grids is used. The objective of this work is to demonstrate the ability of improved delayed detached-eddy simulation to describe the impact of the connecting struts between central stage and boosters and to analyze the efficiency of a buffeting reduction device in the base region. Comparisons of the numerical results with time-resolved and time-averaged surface pressure data and particle-image-velocimetry measurements obtained from the German–Dutch High Speed Wind Tunnel are carried out in good agreement.
Launch Vehicle Base Flow Analysis Using Improved Delayed Detached-Eddy Simulation
AIAA Journal ; 53 , 9 ; 2454-2471
2015-07-23
18 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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