Daniil KALAEV, Luca ARMANI, Rahman ABDUL, Daniele IANNARELLI, Francesco MARGANI, Antonella INGENITO

DOI Number: N/A

Conference number: HiSST-2025-346

Gas generators play a central role in solid-propellant air-breathing propulsion systems, particularly in hypersonic vehicles where compactness, reliability, and thermal efficiency are crucial. Their function is to supply a controlled flow of hot gases that sustain combustion in the main chamber, directly influencing overall performance and stability. This study presents a validated methodology for designing gas generators for solid-propellant air-breathing hypersonic systems. A quasi-one-dimensional model is coupled with high-fidelity 3D CFD simulations to enable both rapid performance prediction and detailed flow analysis. A dynamic grain regression model, implemented via a User Defined Function based on
Vielle’s law, allows the simulation of evolving geometry in response to chamber pressure. Results show strong agreement between 1D and 3D models in predicting pressure, mass generation, and temperature evolution. A newly developed fuel-rich propellant demonstrated improved thermochemical performance and stable gas output, supporting integration with a ramjet combustor. This framework provides a foundation for future coupling with the main combustor and grain geometry optimization across various flight conditions.

Read the full paper here

In Categories: 1.Events, 1.HiSST 2025, Propulsion Systems & Components
Email
Print
LinkedIn
The paper above was part of  proceedings of a CEAS event and as such the author has signed a publication agreement to have their paper published in the repository. In the case this paper is found somewhere else CEAS always links to the other source.  CEAS takes great care in making the correct content available to the reader. If any mistakes are found  in the listings please contact us directly at papers@aerospacerepository.org and we will correct the listing promptly.  CEAS cannot be held liable either for mistakes in editorial or technical aspects, nor for omissions, nor for the correctness of the content. In particular, CEAS does not guarantee completeness or correctness of information contained in external websites which can be accessed via links from CEAS’s websites. Despite accurate research on the content of such linked external websites, CEAS cannot be held liable for their content. Only the content providers of such external sites are liable for their content. Should you notice any mistake in technical or editorial aspects of the CEAS site, please do not hesitate to inform us.