Analysis of Propellant Weight under Re-Entry Conditions for a Reusable Launch Vehicle Using Retropropulsion

Yongchan Kim, Hyoung-Jin Lee and Tae-Seong Roh
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Yongchan Kim: Department of Aerospace Engineering, Inha University, Incheon 21999, Korea
Hyoung-Jin Lee: Department of Aerospace Engineering, Inha University, Incheon 21999, Korea
Tae-Seong Roh: Department of Aerospace Engineering, Inha University, Incheon 21999, Korea

Energies, 2021, vol. 14, issue 11, 1-25

Abstract: In this study, a minimum amount of required propellant was calculated by analyzing the sequence with various re-entry conditions. This study aims to obtain data related to variation in trajectory and required propellant weight according to various re-entry scenarios. The drag coefficient at various altitudes, velocities, and thrust was calculated through numerical simulations to raise the reliability of the results. The calculation results were compared to the optimal values extracted from the genetic algorithm. It was observed that the duration of the entry-burn phase is dominant to the total required propellant weight. As a general tendency, high entry-burn starting altitude, high ending Mach number, and low landing-burn starting thrust make the required propellant weight low. However, if the entry-burn ending condition is set to the Mach number, it is necessary to select an appropriate re-entry condition. Additionally, from comparisons with the optimized results, it was confirmed that accurate calculation of the drag coefficient is important to succeed a soft landing of RLV.

Keywords: reusable launch vehicle; retropropulsion; re-entry; trajectory (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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