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undergraduate thesis
DIZAJN RAKETNOG MOTORA UZ CFD SIMULACIJU
2024. urn:nbn:hr:190:160168
Marašek, Attila
University of Rijeka
Faculty of Engineering
Department of Thermodynamics and Energy Engineering

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Marašek, A. (2024). DIZAJN RAKETNOG MOTORA UZ CFD SIMULACIJU (Undergraduate thesis). Rijeka: University of Rijeka, Faculty of Engineering. Retrieved from https://urn.nsk.hr/urn:nbn:hr:190:160168

Marašek, Attila. "DIZAJN RAKETNOG MOTORA UZ CFD SIMULACIJU." Undergraduate thesis, University of Rijeka, Faculty of Engineering, 2024. https://urn.nsk.hr/urn:nbn:hr:190:160168

Marašek, Attila. "DIZAJN RAKETNOG MOTORA UZ CFD SIMULACIJU." Undergraduate thesis, University of Rijeka, Faculty of Engineering, 2024. https://urn.nsk.hr/urn:nbn:hr:190:160168

Marašek, A. (2024). 'DIZAJN RAKETNOG MOTORA UZ CFD SIMULACIJU', Undergraduate thesis, University of Rijeka, Faculty of Engineering, accessed 28 September 2024, https://urn.nsk.hr/urn:nbn:hr:190:160168

Marašek A. DIZAJN RAKETNOG MOTORA UZ CFD SIMULACIJU [Undergraduate thesis]. Rijeka: University of Rijeka, Faculty of Engineering; 2024 [cited 2024 September 28] Available at: https://urn.nsk.hr/urn:nbn:hr:190:160168

A. Marašek, "DIZAJN RAKETNOG MOTORA UZ CFD SIMULACIJU", Undergraduate thesis, University of Rijeka, Faculty of Engineering, Rijeka, 2024. Available at: https://urn.nsk.hr/urn:nbn:hr:190:160168

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Metadata
TitleDIZAJN RAKETNOG MOTORA UZ CFD SIMULACIJU
Title (english)ROCKET ENGINE DESIGN WITH CFD SIMULATION
AuthorAttila Marašek
MentorTomislav Senčić (mentor)
Committee memberSamir Žic (predsjednik povjerenstva)
Committee memberTomislav Senčić (član povjerenstva)
GranterUniversity of Rijeka
Faculty of Engineering
(Department of Thermodynamics and Energy Engineering)
Rijeka
Defense date and country2024-07-12, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
U ovom radu proveden je proračun i dizajn raketnih motora, s naglaskom na sustave propulzije koji smanjuju troškove proizvodnje dijelova, a zadržavaju visoke performanse za amatersku upotrebu ili lansiranje korisnog tereta do značajnih visina. Korišten je sustav koncentričnih samotlačivih spremnika i dizajn konične mlaznice bez hlađenja komore izgaranja, s procijenjenim potiskom od 6000 njutna. Python programom simulirano je pražnjenje spremnika, ključno za modeliranje izgaranja i procjenu potiska. Na temelju proračuna dobivena je geometrija motora, a CFD simulacija toka fluida provedena je korištenjem programa OpenFOAM i rješavača sonicFoam. Simulacija je pokazala da postoji minimalno odstupanje između idealnih i simuliranih brzina (0.008%), ali i da dolazi do odvajanja fluida od zidova mlaznice na grlu, stvarajući recirkulacijske zone i neravnomjerni tlak u divergentnom dijelu. Ovaj fenomen uzrokuje povećani izlazni tlak ispušnih plinova (17%), što je vidljivo kroz dijamantne udarne valove.
Abstract (english)
This study involves the calculation and design of rocket engines, focusing on propulsion systems that reduce production costs while maintaining high performance for amateur use or launching payloads to significant altitudes. A system of concentric self-pressurizing tanks and a conical nozzle design without combustion chamber cooling was used, with an estimated thrust of 6000 newtons. A Python program simulated the tank discharge, which is crucial for modeling combustion and estimating thrust. Based on the calculations, the rocket engine's geometry was determined, and a CFD simulation of the fluid flow was conducted using OpenFOAM and the sonicFoam solver. The simulation indicated minimal deviation between ideal and simulated velocities (0.008%), but also revealed fluid separation from the nozzle walls at the throat, creating recirculation zones and uneven pressure in the divergent section. This phenomenon causes increased exhaust gas pressure (17%) at the nozzle exit, evident through diamond shock waves.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:190:160168
Study programmeTitle: Mechanical Engineering
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence Attribution 4.0 International (CC BY 4.0) icon
Created on2024-07-10 19:29:56