20.500.12556/RUL-161147 Vpliv deformabilne šobe na zmogljivost raketnega motorja Influence of a deformable nozzle on the rocket engine performance Optimalna oblika raketnih šob je odvisna od tlaka, ki pa se med letom rakete spreminja. V tem delu smo preučili novo rešitev za višinsko kompenzacijo. Predlagana rešitev temelji na spreminjanju oblike šobe za boljšo zmogljivost. Preiskave smo se lotili s CFD analizo stisljivega toka z dinamično mrežo v programskem okolju OpenFOAM. Rezultati simulacije kažejo na boljšo zmogljivost deformabilne šobe v primerjavi z nespremenljivimi šobami. Pokazali smo, da je ustvarjena sila deformabilne šobe, med letom rakete večinoma konstantna, torej uspešno kompenzira spreminjanje tlaka. The optimal shape of rocket nozzles depends on the pressure, which changes during the rocket's flight. In this work, we have studied a new solution for altitude compensation. The proposed solution is based on changing the shape of the nozzle for better performance. The study was carried out using CFD analysis of compressible flow with a dynamic mesh in the OpenFOAM software. The simulation results show a better performance of the deformable nozzle compared to the fixed nozzles. We have shown that the generated force of the deformable nozzle is mostly constant during the rocket's flight, i.e. it successfully compensates for pressure changes. konvergentno–divergentna šoba openfoam CFD deformabilnost dinamika fluidov dinamična mreža de Laval nozzle openfoam CFD deformability fluid dynamics dynamic mesh true false false Slovenski jezik Angleški jezik Zaključna naloga 2024-09-07 08:31:58 2024-09-07 08:32:00 2024-11-11 13:14:20 0000-00-00 00:00:00 2024 0 0 XIII, 34 f. 2024 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 533.665:53.092:004.41(043.2) 265428 214529027 36843.pdf 36843.pdf 1 C419547C2E8E0A307F67904BB974A0B6 1d87901bcbc7ae44abd004eace3b09e264600726f74bd6170afbe4bf5ddf88fa dc8283eb-6ce2-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=190021 Fakulteta za strojništvo 0 0 0