Proceedings of the International Conference on Recent Innovations in Sustainable Engineering Solutions 2025 (ICONRISES 2025)

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Sustainable Dual Thrust Hybrid Rocket Motor Using Polylactic Acid as Sustainer Fuel in Multilayered Tubular Fuel Grain

Authors
Mohamad Mukri Najmi Bin Muhammad Nadzri1, Muhammad Yusuf Bin Mahat1, Izham Izzat Ismail1, Siti Zafirah binti Abdul Kadir1, Nur ‘Ain Najlaa binti Zazuzila Nadzri1, Muhammad Hanafi bin Azami1, *
1Department of Mechanical and Aerospace Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, Selangor, Malaysia
*Corresponding author. Email: hanafiazami@iium.edu.my
Corresponding Author
Muhammad Hanafi bin Azami
Available Online 15 December 2025.
DOI
10.2991/978-94-6463-920-9_11How to use a DOI?
Keywords
Hybrid Rocket Motor; Dual Thrust Propulsion; Multi-Layered Tubular Fuel Grain
Abstract

This study explores the thrust modulation capability of a hybrid rocket motor (HRM) using a novel multilayer tubular (MLT) fuel grain configuration. The fuel design integrates two distinct fuel materials paraffin wax as a booster and polylactic acid (PLA) as a sustainer arranged in concentric layers to achieve a dual-thrust profile. Two configurations (MLT 1 and MLT 2) were fabricated and tested, each varying in booster and sustainer web thickness. Experimental static firing results demonstrated that MLT 2, with a thicker booster layer, achieved superior performance with a higher specific impulse (106.349 s), regression rate (1.638 mm/s), and thrust (71.482 N) compared to MLT 1. Thrust-time profiles confirmed the successful replication of a boost-sustain combustion behavior. The results validate the potential of passive thrust modulation through fuel grain architecture, offering a sustainable and valve-free approach for dual-thrust hybrid rocket applications.

Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the International Conference on Recent Innovations in Sustainable Engineering Solutions 2025 (ICONRISES 2025)
Series
Advances in Engineering Research
Publication Date
15 December 2025
ISBN
978-94-6463-920-9
ISSN
2352-5401
DOI
10.2991/978-94-6463-920-9_11How to use a DOI?
Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Mohamad Mukri Najmi Bin Muhammad Nadzri
AU  - Muhammad Yusuf Bin Mahat
AU  - Izham Izzat Ismail
AU  - Siti Zafirah binti Abdul Kadir
AU  - Nur ‘Ain Najlaa binti Zazuzila Nadzri
AU  - Muhammad Hanafi bin Azami
PY  - 2025
DA  - 2025/12/15
TI  - Sustainable Dual Thrust Hybrid Rocket Motor Using Polylactic Acid as Sustainer Fuel in Multilayered Tubular Fuel Grain
BT  - Proceedings of the International Conference on Recent Innovations in Sustainable Engineering Solutions 2025 (ICONRISES 2025)
PB  - Atlantis Press
SP  - 100
EP  - 108
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-920-9_11
DO  - 10.2991/978-94-6463-920-9_11
ID  - Nadzri2025
ER  -