Rocket nozzles: 75 years of research and development

S Khare, UK Saha - Sādhanā, 2021 - Springer
The nozzle forms a large segment of the rocket engine structure, and as a whole, the
performance of a rocket largely depends upon its aerodynamic design. The principal …

Multiobjective optimization of a staggered-rotor octocopter design based on a surrogate model

H Zhu, D Li, H Nie, X Wei, Y Wei - Aerospace Science and Technology, 2023 - Elsevier
When designing a novel double-layer staggered-rotor octocopter with improved
aerodynamic performance, the aerodynamic performance and structural parameters will …

Control co-design optimization of spacecraft trajectory and system for interplanetary missions

GW Harris, P He, OO Abdelkhalik - Journal of Spacecraft and Rockets, 2024 - arc.aiaa.org
This paper develops a control co-design (CCD) framework to simultaneously optimize the
spacecraft's trajectory and onboard system (rocket engine) and quantify its benefit. An open …

Surrogate neural network for rapid flight performance evaluation of hybrid rocket engines

A Zavoli, P Maria Zolla, L Federici… - Journal of Spacecraft …, 2022 - arc.aiaa.org
This paper investigates the use of neural networks as surrogate models for fast and accurate
performance prediction of hybrid rocket engines (HREs). To this aim, a deep feedforward …

[HTML][HTML] Multi-disciplinary optimization of single-stage hybrid rockets for lunar ascent

PM Zolla, R Rosa, MT Migliorino, D Bianchi - Acta Astronautica, 2024 - Elsevier
This study aims to determine the optimal design and ascent trajectory for a single-stage
hybrid rocket in the context of a lunar ascent mission, with the objective of reaching a 100 km …

Multi-disciplinary Optimization of Single-stage Hybrid Rocket with Swirl Injection for Lunar Ascent

P Zolla, R Rosa, MT Migliorino, D Bianchi - AIAA SCITECH 2023 Forum, 2023 - arc.aiaa.org
View Video Presentation: https://doi. org/10.2514/6.2023-2349. vid This paper investigates
the use of swirl injection in hybrid rocket engines as a means to improve the overall design …

[HTML][HTML] Flow field explorations and design improvements of a hybrid rocket motor LOx feed line

DJ Rajendran, M Santhanakrishnan, V Pachidis… - Acta Astronautica, 2024 - Elsevier
The oxidizer system in a hybrid rocket motor needs to deliver the flow from a pressurized
storage tank to multiple combustor ports. Pressure losses in the oxidizer system directly …

Integrated Optimization of a Three-Stage Clustered Hybrid Rocket Launcher using Neural Networks

P Zolla, A Zavoli, MT Migliorino, D Bianchi - AIAA SCITECH 2024 …, 2024 - arc.aiaa.org
In this paper, the integrated optimization of a hybrid launch vehicle is analyzed for a nominal
mission to a 500 km polar circular orbit. A single hybrid rocket engine unit is reused across …

A computational tool for the design of hybrid rockets

PM Zolla, MT Migliorino, D Bianchi, F Nasuti… - Aerotecnica Missili & …, 2021 - Springer
A computational tool able to perform a fast analysis of hybrid rocket engines is presented,
describing briefly the mathematical and physical models used. Validation of the code is also …

Aerodynamic design optimization of a staggered rotors octocopter based on surrogate model

H Zhu, H Nie, L Zhang, S Deng, X Wei - Journal of Aerospace …, 2021 - ascelibrary.org
Improving aerodynamic performance with limited dimensions is becoming more important in
the design of multirotor aircraft. Complex coupling interactions exist between the structural …