Trodimenzionalna numerička simulacija procesa izgaranja u komori izgaranja mlaznog motora

Delić, Fran (2019) Trodimenzionalna numerička simulacija procesa izgaranja u komori izgaranja mlaznog motora. = Three-dimensional numerical simulation of combustion in a jet engine combustion chamber. Master's thesis (Bologna) , Sveučilište u Zagrebu, Fakultet strojarstva i brodogradnje, UNSPECIFIED. Mentor: Jasak, Hrvoje.

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Abstract (Croatian)

U radu su opisane jednadžbe i aproksimacije koje se koriste u modeliranju procesa izgaranja. Za validaciju koristenog modela (partially stirred reactor), rezultati su uspoređeni s eksperimentalnim podacima mjerenim za Sandia Flame D plamen. Također je istražen utjecaj kemijskih reakcija na glavne karakteristike strujanja. Budući da su za simulacije korišteni reakcijski mehanizmi s različitim brojem kemijskih reakcija, u sklopu rada je implementiran prošireni Zeldovichev mehanizam za proračun koncentracije NO. Validirani modeli korišteni su za simulaciju pojava u Rolls Royce Tay komori izgaranja pri različitim postavkama u uvjetima polijetanja, te su rezultati uspoređeni s eksperimentalnim podacima. Emisije NOx spojeva uspoređene su s dostupnim podacima Organizacije međunarodnog civilnog zrakoplovstva.

Abstract

The objective of this thesis is to simulate the combustion process inside a jet engine combustion chamber using Computational Fluid Dynamics. The mathematical foundations and main issues of combustion modelling are presented. The partially stirred reactor (PaSR) combustion model, coupled with the k-ε turbulence model, is validated on the Sandia Flame D test case. The influence of three-dimensional effects and reaction mechanism complexity on flow characteristics is examined. The extended Zeldovich mechanism is used to calculate NO emissions, comparing results computed using reaction mechanisms of increasing complexity to experimental data. Numerical combustion simulations are performed on the Rolls Royce Tay geometry, for two flow configurations at take-off conditions. Simulation results are compared to available experimental data. The extended Zeldovich mechanism is used to model NOx emissions, which are compared to International Civil Aviation Organization emissions data.

Item Type: Thesis (Master's thesis (Bologna))
Uncontrolled Keywords: CFD, OpenFOAM, foam-extend, PaSR, reactingFoam, extended Zeldovich, Sandia Flame D, Rolls Royce Tay
Keywords (Croatian): CFD, OpenFOAM, foam-extend, PaSR, reactingFoam, extended Zeldovich, Sandia Flame D, Rolls Royce Tay.
Subjects: TECHNICAL SCIENCE > Aviation, rocket and space technology
Divisions: 500 Department of Energy, Power Engineering and Environment > 530 Chair of Turbomachinery
Date Deposited: 29 Mar 2019 12:16
Last Modified: 08 Jul 2019 10:17
URI: http://repozitorij.fsb.hr/id/eprint/9279

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