Temat: CFD modeling - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: How much a geometrical model of a honeycomb seal can be simplied in the CFD calculation
Autorzy:: Stajnke, M.
Włodarski, W.
Tematy:: CFD modeling
steam turbine
seal
honeycomb; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/175443.pdf Link otwiera się w nowym oknie
Opis:: This paper presents the influence of geometry simplification on the results obtained in the computational fluid dynamics simulation. The subject of simulation was part of the honeycomb seal located at the inlet to high pressure part of a steam turbine. There were three diferent geometrical models assumed in the calculations. First one was two-dimensional case and two others were three-dimensional, one with the radius of curvature and one without. Numerical simulations were performed for 15 sets of boundary conditions to compare flow characteristics for each geometrical case.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Determination of the flow characteristic of a high-rotational centrifugal pump by means of CFD methods
Autorzy:: Dykas, S.
Wilk, A.
Tematy:: centrifugal pump
CFD modeling
flow characteristic; Pokaż więcej
Wydawca:: Politechnika Gdańska
Powiązania:: https://bibliotekanauki.pl/articles/1943238.pdf Link otwiera się w nowym oknie
Opis:: The paper refers to a numerical analysis of the flow through a centrifugal pump working at high rotational speed. This kind of a pump is characterized by a high delivery head and a low discharge. The considered pump is a one-stage centrifugal pump with a rotational speed of 12 000 rpm. This pump has been manufactured and prepared for experimental research. The main purpose of the presented research has been to determine the flow characteristic of the pump by means of CFD methods. To this end the commercial CFD code, ANSYS CFX 11, has been used. The obtained numerical results have shown high usefulness of the CFD methods for the flow machinery design process. In the next step the obtained flow characteristic will be compared with the experimental investigations.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Investigation of aerodynamic parameters of solar plane airfoil using CFD modeling
Autorzy:: Jaszczur, Marek
Papis, Karolina
Książek, Michał
Czerwiński, Grzegorz
Wojtas, Gabriel
Koncewicz, Wojciech
Nabożna, Sylwia
Wójcik, Marcin
Tematy:: solar plane
aerodynamic parameters
CFD modeling; Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Powiązania:: https://bibliotekanauki.pl/articles/2097896.pdf Link otwiera się w nowym oknie
Opis:: The technology of solar-powered aerial vehicles requires enormous financial support and further development. For this purpose, the computational fluid dynamic can be used. In order to carry out necessary analyses and model development in this research, ANSYS Fluent software was used. Using the first version of the AGH Solar Plane model, preliminary analysis of lift, drag and tearing off the stream was performed. Four new geometries were prepared on which the flattening of upper surfaces for fixing solar panels was tested. The results were validated in the aerodynamic tunnel using particle image velocimetry method. Taking into account all analyses, a number of recommendations have been prepared that will be implemented to create an aircraft, which meets all target requirements.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Analysis of unsteady flow forces on the thermowell of steam temperature sensor
Autorzy:: Kornet, S.
Sławiński, D.
Ziółkowski, P.
Badur, J.
Tematy:: unsteady flow
resonance
CFD modeling
CSD modeling; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/175578.pdf Link otwiera się w nowym oknie
Opis:: In this paper, 3D numerical analysis of unsteady flow forces acting on the thermowell of steam temperature sensor is presented. According to that purpose, the CFD+CSD (computational fluid–solid dynamics) approach has been used. The nonstationary of fluid acting on the thermowell such as: Strouhal frequency, amplitude of pressure, structure of vortex, peak of pressure, field of pressure, field of velocity, etc. are studied analytically and numerically. There have been examined two cases of flow with changing both temperature, pressure and mass flow rate (operating daily and night in the unit with capacity of 380 MWe). In accordance with the standards ASME PTC 19.3 TW-2010 the possibility of entry into resonance has been examined.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Modelowanie 3D procesu napełniania w silniku o ZI
3D modeling of the SI engine intake process
Autorzy:: Pietrykowski, K.
Wendeker, M.
Grabowski, Ł.
Tematy:: modelowanie CFD
proces napełniania
CFD modeling
intake process; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/395475.pdf Link otwiera się w nowym oknie
Opis:: W Politechnice Lubelskiej powadzone są prace mające na celu opracowanie systemu zasilania wodorem silnika o ZI. W celu poznania zjawisk zachodzących podczas procesu napełniania silnika przeprowadzono badania modelowe z wykorzystaniem oprogramowania AVL Fire. W artykule przedstawiono wyniki badań modelowych ilustrujące zjawiska związane z przepływem powietrza przez kanały dolotowe silnika jak również ruch powietrza w komorze spalania.
Hydrogen supply system for SI engines is developed in Lublin University of Technology. To learn the phenomena that occur during the engine filling process, AVL based modeling was performed. This paper describes the results of the modeling studies to show the air flow through engine intake duct and the air movement in the combustion chamber.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Analysis of dustiness state in a driven underground dog heading ventilating by auxiliary air-duct
Autorzy:: Brodny, Jarosław
Tutak, Magdalena
Tematy:: dust
CFD modeling
dog heading
mining exploitation; Pokaż więcej
Wydawca:: STE GROUP
Powiązania:: https://bibliotekanauki.pl/articles/410090.pdf Link otwiera się w nowym oknie
Opis:: Dustiness of the mine atmosphere during carrying out exploitation is one of the most hazardous factors threaten to health and life of employees. Also it is large hazard for all type of mechanical and electrical devices operating in mining headings. Coal dust is also very dangerous due to its possibility of explosion. Currently applied technologies of rock mass mining process, entire transport process of output and applied ventilation system cause that rock and coal dust is presented practically in each of the mining heading. Practically, is impossible to eliminate dust from mining headings. However, one can determine its parameters and potential ways its displacement. In the paper there is presented modeling research methodology of dustiness state in a driven dog heading. Developed model is the basis for this methodology, including the diphase flow of mixture of air and dust in the mining heading. Analysis was performed for real driven dog heading. Based on performed analyses, distributions of particular fraction and movement trajectories of selected dust grains were determined. Developed methodology gives a lot of opportunities for analysis of dustiness state in mining headings and in other compartments. It enables to determine parameters of particular grains and their impact on ventilation parameters of the air stream in the tested headings. Obtained results can also be used to reduce dust hazard.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: CFD modeling of passive autocatalytic recombiners
Autorzy:: Orszulik, M.
Fic, A.
Bury, T.
Tematy:: nuclear reactor
hydrogen
passive autocatalytic recombiners
CFD modeling; Pokaż więcej
Wydawca:: Instytut Chemii i Techniki Jądrowej
Powiązania:: https://bibliotekanauki.pl/articles/147615.pdf Link otwiera się w nowym oknie
Opis:: This study deals with numerical modeling of passive autocatalytic hydrogen recombiners (PARs). Such devices are installed within containments of many nuclear reactors in order to remove hydrogen and convert it to steam. The main purpose of this work is to develop a numerical model of passive autocatalytic recombiner (PAR) using the commercial computational fluid dynamics (CFD) software ANSYS-FLUENT and tuning the model using experimental results. The REKO 3 experiment was used for this purpose. Experiment was made in the Institute for Safety Research and Reactor Technology in Julich (Germany). It has been performed for different hydrogen concentrations, different flow rates, the presence of steam, and different initial temperatures of the inlet mixture. The model of this experimental recombiner was elaborated within the framework of this work. The influence of mesh, gas thermal conductivity coefficient, mass diffusivity coefficients, and turbulence model was investigated. The best results with a good agreement with REKO 3 data were received for k-ε model of turbulence, gas thermal conductivity dependent on the temperature and mass diffusivity coefficients taken from CHEMKIN program. The validated model of the PAR was next implemented into simple two-dimensional simulations of hydrogen behavior within a subcompartment of a containment building.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Modeling of a mixture ﬂow of helium and methanol in thermocatalytic reactor and chemical reactions on the intermethallic phase of Ni3A
Autorzy:: Ziółkowski, P.
Stajnke, M.
Jóźwik, P.
Tematy:: CFD modeling
numerical analysis
methanol decomposition
catalytic reactions; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/175269.pdf Link otwiera się w nowym oknie
Opis:: In this paper, the speciﬁed issues that occurs in the numerical modeling of complex phenomena of chemical reactions intensiﬁed with forced ﬂuid ﬂow in the thermocatalytic reactor channels on the intermetallic phase of Ni3Al are presented. Based on the example of ﬂowing mixture containing helium contaminated by methanol in a horizontal microchannels, heated from the outside, received results of the experiment were shown and compared with computational ﬂuid dynamize calculations. However, standard version of commercial code have been expanded by user deﬁnedfunctions. These extensionstransformed the calculation mechanisms and algorithms of computational ﬂuid dynamize codes adapting them for the micro-ﬂow cases and increased chemical reactions rate on an interphase between ﬂuid and solid. Results obtained on the way of numerical calculations were compared with experimental data receiving satisfactory compliance.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: An advanced thermal-FSI approach of an evaporation of air heat pump
Autorzy:: Felicjancik, J.
Ziółkowski, P.
Badur, J.
Tematy:: CFD modeling
evaporator
fin-tube heat exchanger
heat transfer; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/175437.pdf Link otwiera się w nowym oknie
Opis:: The paper presents selected problems of numerical modelling of an advanced thermal- FSI (Fluid solid interaction) approach of evaporator of air heat pump. The example of a fin-tube evaporator has been studied, focusing on obtaining the heat exchanger characteristics applying two-phase flow model for the in-tube refrigerant flow. Special attention is given to heat transfer between separated medium for different air velocity and changed refrigerant mass flow in-tube.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Hydraulic mixing modelling in reactor for biogas production
Autorzy:: Chmielewski, A. G.
Berbeć, A.
Zalewski, M.
Dobrowolski, A.
Tematy:: biogas
biomass mixing
bioreactor
CFD modeling
biogaz
mieszanie biomasy
bioreaktor
modelowanie CFD; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/185258.pdf Link otwiera się w nowym oknie
Opis:: Two-stage biogas production plant consists of two reactors: a hydrolyser and a fermentor. The bioreactor construction has to meet three requirements: low cost and simplicity of construction and good biomass mixing conditions with an application of appropriate method. This paper reports CFD modelling of hydraulic mixing in the tank to be applied in a two-stage industrial installation.
Dostawca treści:: Biblioteka Nauki

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