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Joining of CFRP and metal parts
Dolinský, Jiří ; Urík, Tomáš (oponent) ; Symonov, Volodymyr (vedoucí práce)
This thesis describes basic principles of joining advanced composites together and also joining advanced composites to metal counterparts. The main goal of this thesis is to come up with suitable solution of the joint between metal hinge and CFRP wing spar for flying car AeroMobil 3,0. For calculation of stress-strain analysis a special analytical method is used, which was performed by means of computer software MATLAB and Excel. Final design of the joint is performed by aid of computer software Autodesk Inventor. Submitted solution is not practically tested, hence it has to be considered as a first approximation of future design.
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Numerical Study Of Pulsating Jet At Moderately Small Reynolds Numbers
Dolinský, Jiří ; Doupník, Petr (oponent) ; Popela, Robert (vedoucí práce)
This numerical study is focused on axisymmetric pulsatile jets of moderately small Reynolds numbers and their physics which has not been fully understood so far. The main goal of the thesis is to investigate and assess the effect of introducing time-harmonic velocity component onto the steady velocity component. At first, the steady case was resolved and verified, afterwards the pulsation was introduced and the unsteady solution was carried out. The numerical solution for steady axisymmetric jet has been verified based on asymptotic solution obtained by Hermann Schlichting [44]. Moreover, an original Schlichting's solution was corrected according to an experimental observation obtained by Andrade and Tsien [1], which reduces solution singularity in the near-nozzle area. This correction was proven to be a first-order correction of the original asymptotic solution from a mathematical standpoint by Revuelta et al [36]. The analytical solution was developed in MATLAB while for the numerical simulation, the Ansys Fluent was used and the time-accurate integration of the Navier-Stokes equations based on pressure-correction approach was employed in order to solve the problem. The pulsatile jet was calculated for a set of different parameters in order to assess their impact on the jet evolution. Finally, the possible application in the industry with regards to elimination of pollutants emerging during the combustion process was discussed.
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Numerical Study Of Pulsating Jet At Moderately Small Reynolds Numbers
Dolinský, Jiří ; Doupník, Petr (oponent) ; Popela, Robert (vedoucí práce)
This numerical study is focused on axisymmetric pulsatile jets of moderately small Reynolds numbers and their physics which has not been fully understood so far. The main goal of the thesis is to investigate and assess the effect of introducing time-harmonic velocity component onto the steady velocity component. At first, the steady case was resolved and verified, afterwards the pulsation was introduced and the unsteady solution was carried out. The numerical solution for steady axisymmetric jet has been verified based on asymptotic solution obtained by Hermann Schlichting [44]. Moreover, an original Schlichting's solution was corrected according to an experimental observation obtained by Andrade and Tsien [1], which reduces solution singularity in the near-nozzle area. This correction was proven to be a first-order correction of the original asymptotic solution from a mathematical standpoint by Revuelta et al [36]. The analytical solution was developed in MATLAB while for the numerical simulation, the Ansys Fluent was used and the time-accurate integration of the Navier-Stokes equations based on pressure-correction approach was employed in order to solve the problem. The pulsatile jet was calculated for a set of different parameters in order to assess their impact on the jet evolution. Finally, the possible application in the industry with regards to elimination of pollutants emerging during the combustion process was discussed.
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Joining of CFRP and metal parts
Dolinský, Jiří ; Urík, Tomáš (oponent) ; Symonov, Volodymyr (vedoucí práce)
This thesis describes basic principles of joining advanced composites together and also joining advanced composites to metal counterparts. The main goal of this thesis is to come up with suitable solution of the joint between metal hinge and CFRP wing spar for flying car AeroMobil 3,0. For calculation of stress-strain analysis a special analytical method is used, which was performed by means of computer software MATLAB and Excel. Final design of the joint is performed by aid of computer software Autodesk Inventor. Submitted solution is not practically tested, hence it has to be considered as a first approximation of future design.
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