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2D FEM for Rotor Thermal Bow Calculation

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F22%3A00361101" target="_blank" >RIV/68407700:21220/22:00361101 - isvavai.cz</a>

  • Result on the web

    <a href="https://www.fs.cvut.cz/ustavy/sekce-centrum-leteckeho-a-kosmickeho-vyzkumu/centrum-leteckeho-a-kosmickeho-vyzkumu-12203/centrum-12203/" target="_blank" >https://www.fs.cvut.cz/ustavy/sekce-centrum-leteckeho-a-kosmickeho-vyzkumu/centrum-leteckeho-a-kosmickeho-vyzkumu-12203/centrum-12203/</a>

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    2D FEM for Rotor Thermal Bow Calculation

  • Original language description

    Numerical modelling of mechanical systems is a helpful tool for system behaviour analyses. There are several well-known commercial software that deals with different solution areas. The possibility of using software is more limited when solving interdisciplinary tasks. This is due to many differences in the specific field of solutions (structural analyses, temperature distribution, or heat transfer). For the most part, finite element solvers are therefore limited to a narrow group of solvable problems, or the solvers are even very generalized to universal problems. For specific analyses of aircraft engine rotors, a FEM solver consisting of Matlab scripts was developed, in which optional boundary and initial conditions as well as the type and scope of the problem being solved are implemented. The contribution presents a sensitivity analysis of the basic thermodynamic parameters during the operation of the aircraft engine rotor and their influence on the structural analysis and, above all, the deformation of the system.

  • Czech name

  • Czech description

Classification

  • Type

    R - Software

  • CEP classification

  • OECD FORD branch

    20304 - Aerospace engineering

Result continuities

  • Project

    <a href="/en/project/EF16_019%2F0000826" target="_blank" >EF16_019/0000826: Center of Advanced Aerospace Technology</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2022

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Internal product ID

    12203_CASR_Parez_RTB_2D

  • Technical parameters

    The finite element method was used to build the 2D calculation model. This is a discretization method. The modeling is based on the selected dimensions of the gas generator rotor system. The modeled system is appropriately discretized into 2D elements. The outer diameter of the shaft and the length of the element were entered for each element. Material constants were assigned for each element. For each element, the quadratic moment of the cross-sectional area was calculated from the outer diameter of the given element. First, the temperature field was determined using temperature matrices ???? with two temperatures for boundary conditions on the first and last nodes and equality of heat conduction ???? in the shaft. Furthermore, stiffness matrices ???????? were compiled for individual elements, from which global stiffness matrice ???????? were compiled. The computational model is made of one isotropic material, which is steel. The material properties are Young's modulus of elasticity in tension. The entire rotor model consists of a compressor, combustor, and turbine. These are then connected by a shaft and supported in bearings. The bearings are considered in the calculation models as isotropic point supports, by adding the condition of shaft deflection to the appropriate node. The result is the deflection of the rotor system depending on the defined parameters.

  • Economical parameters

    The economic benefit of the developed software is possible in the case of its use in the design of rotor systems as well as in the case of monitoring the behaviour of systems in operation. The software works on the basis of Matlab scripts. The input parameters are selectable without significant restrictions.

  • Owner IČO

    68407700

  • Owner name

    České vysoké učení technické v Praze / FS / centrum leteckého a kosmického výzkumu