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Analysis of Hypersonic Tip-Off Rates for Venus Aerocapture

Rollock, Annika E. and Braun, Robert D. (2020) Analysis of Hypersonic Tip-Off Rates for Venus Aerocapture. In: AIAA Scitech 2020 Forum. American Institute of Aeronautics and Astronautics , Reston, VA, Art. No. 2020-1739. ISBN 978-1-62410-595-1.

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Aerocapture is an innovative aeroassist maneuver that has the potential to greatly reduce the fuel and subsequent mass required in order to enter orbit or land on a planetary body. One such method of aerocapture utilizes a discrete drag modulation event in order to alter the vehicle's ballistic coefficient as a control method. However, the dynamics of the hypersonic jettison event are largely unexplored in literature, particularly surrounding an off-nominal separation event. This paper investigates the tip-off dynamics of hypersonic vehicle separation during planetary aerocapture as well as the risk of recontact due to suction between the skirt and the probe. Venus is selected in order to analyze the dynamics in the most challenging environment. Initial tip-off angles and angular rates are applied in order to assess the risk of vehicle recontact and analyze the resulting dynamics of the probe in flight. Additionally, following a series of scaled ballistic range tests conducted as part of the Venus mission concept development, recontact was observed between the skirt and the probe during the separation events. These tests were recreated in the inviscid CFD environment and compared to the real flight test results.

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Additional Information:© 2020 by the American Institute of Aeronautics and Astronautics, Inc. Published Online: 5 Jan 2020.
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AIAA Paper2020-1739
Record Number:CaltechAUTHORS:20210622-222534784
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Official Citation:Annika E. Rollock and Robert D. Braun. "Analysis of Hypersonic Tip-Off Rates for Venus Aerocapture," AIAA 2020-1739. AIAA Scitech 2020 Forum. January 2020; DOI: 10.2514/6.2020-1739
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:109541
Deposited By: Tony Diaz
Deposited On:23 Jun 2021 18:43
Last Modified:23 Jun 2021 18:43

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