|Time:||January 11, 2023, 4:00 p.m. (CET)|
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Our guest Yusuke Takahashi will give a presentation on Wednesday, January 11, 4pm on "Coupling problems and partitioned-based approach for an inflatable aeroshell as innovative atmospheric entry technology"
You can either join directly in the multimedia lab or online.
Multimedia lab: U38, 2.308
Abstract: Transportation from space to the planet’s surface, which is in the atmospheric entry, descent, and landing (EDL) phase, is an important field in space engineering. Because spacecraft generally have extremely high velocities such as over 7.8 km/s in space, the aerodynamic deceleration during the EDL process occurs various problems. Those examples are aerodynamic heating originating from strong shock waves formed by hypersonic flows, communication blackout which is the blocking of telecommunication electromagnetic waves by atmospheric-entry plasma, and aerodynamic attitude instability. Now, an innovative atmospheric entry technology, the inflatable entry vehicle, has been proposed. This technology has a large-area and lightweight aeroshell that provides efficient aerodynamic deceleration at high altitudes and reduces problems such as aerodynamic heating. However, the flexible structure of the fabric allows it to be easily deformed by aerodynamic forces in the EDL phase. While this has an impact on the surface heating and the vehicle’s attitude, it is difficult to evaluate the effect of the deformation. To clarify the detailed coupled behavior of the high-speed flows and the flexible structures, a numerical analysis model based on a partitioned approach was developed. The verification and validation of the analytical model were also performed through comparison with the results of wind tunnel experiments. The analytical model revealed the fluid-structure interaction of flexible aeroshells in subsonic and transonic flows. The results and discussion are presented in this meeting.