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EnglishThe dual-bell nozzle is a promising concept for improving the performance of space launchers. It is characterised by the presence of two altitude-dependent working modes which allow to reduce non-adaptation losses. However, the transition between the two working modes usually takes place prematurely and dangerous side loads might be observed. In this work, fluidic control is investigated as a potential method to delay the transition and limit the risk of side loads. An Ariane 5-like launcher configuration with a dual-bell nozzle in the core engine is considered. First, a parametric optimisation is performed to identify the dual-bell geometry that maximises the payload mass delivered into geostationary transfer: a preliminary model is adopted to describe the dual-bell mode transition and a fast and reliable in-house trajectory optimisation code is used to optimise the ascent trajectory. The flow field in the optimal geometry is then investigated by CFD simulations to verify the effectiveness of fluidic control. Finally, the CFD study results are used to model the dual-bell mode transition and trajectory optimisation is performed again. The proposed solution is characterised by a large payload gain with respect to the reference launcher. Fluidic control significantly reduces side loads which can arise during transition.
Dual-bell nozzle with fluidic control of transition for space launchers / Ferrero, Andrea; Conte, Antonietta; Martelli, Emanuele; Nasuti, Francesco; Pastrone, Dario Giuseppe. - In: ACTA ASTRONAUTICA. - ISSN 0094-5765. - STAMPA. - 193:(2022), pp. 130-137. [10.1016/j.actaastro.2021.12.048]
| Titolo: | Dual-bell nozzle with fluidic control of transition for space launchers | |
| Autori: | ||
| Data di pubblicazione: | 2022 | |
| Rivista: | ||
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.actaastro.2021.12.048 | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
File in questo prodotto:
| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| paper-postprint.pdf | Articolo principale | 2. Post-print / Author's Accepted Manuscript |  | Embargo: 11/01/2024 Richiedi una copia |
| preprint.pdf | Articolo principale | 1. Preprint / submitted version [pre- review] | | Visibile a tuttiVisualizza/Apri |
| 1-s2.0-S0094576521006949-main.pdf | Articolo principale | 2a Post-print versione editoriale / Version of Record | Non Pubblico - Accesso privato/ristretto | Administrator Richiedi una copia |
http://hdl.handle.net/11583/2948812
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