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POLITECNICO OF TURIN

MASTER DEGREE THESIS IN AEROSPACE ENGINEERING

Study on structural behavior of an atmospheric reentry vehicle during ditching

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Part of ESAs Future Launchers Preparatory Programme has been devoted to optimizing a long-term European roadmap for in-flight experimentation with atmospheric re-entry enabling systems and technologies.

Thesis activity

The Intermediate eXperimental Vehicle (IXV) project is the next core step of this effort.

This work has been developed within the IXV project and with closed collaboration of TAS-I and ESA.

Many thanks to ESA and TAS for their support. Thanks also to Altair Engineering for providing the software suite for the analysis.

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The IXV Project

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Experimental measurements

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Modeling methodology

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IXV numerical model

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Fluid numerical model

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Fluid numerical modelWATER BASIN COMPARISONDeep water modelShallow water modelHorizontal1,22 x 2,14 [m]1,22 x 2,14 [m]Vertical0,8 [m]0,4 [m]N Elements335265189317CPU Time8413 [s]5077 [s]

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Characteristic elements dimension2D ELEMENTS (VEHICLE)3D ELEMENTS (AIR)3D ELEMENTS (WATER)HEIGHT20 [mm]20 [mm]20 [mm]WIDTH20 [mm]20 [mm]20 [mm]DEPTH/10 [mm]10 [mm]N ELEMENTS356478324287188

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Fluid-structure interface

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Boundary-initial conditions

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Numerical - Experimental Correlation

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First LoadcaseAX - COGAZ - COGNumericalExperimental

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Second Loadcase

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Third Loadcase

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Third Loadcase19 deg Sensor35 deg Sensor51 deg SensorNumericalExperimentalNumericalExperimental14/17

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Correlation results summary15/17

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Remarks and further developments16/17

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Thanks for your attention17/17

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