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    Wyświetlanie 1-4 z 4
    Tytuł:
    The rate of decohesion of a gas turbine blade as assessed with the X-ray computed tomography (CT)
    Autorzy:
    Chalimoniuk, M.
    Szczepanik, R
    Błachnio, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/242103.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    gas turbine
    blade
    maintenance status
    diagnosing
    X-Ray computer tomography (CT)
    composite materials
    Opis:
    The overheating of the material is among major reasons for failures/damages to gas turbine blades throughout the entire process of operating aircraft turbine engines. The essential method of diagnosing condition of the blades is metallographic examination being however a destructive technique. The paper has been intended to discuss one of non-destructive testing (NDT) methods, i.e. the X-ray computed tomography (CT), and capabilities of applying it to diagnose changes in condition of gas turbine blades. ‘Tomography’ is a comprehensive term to define a set of diagnostic techniques to produce three-dimensional images that present cross-sections through detail items under scrutiny. The CT is a transmission diagnostic technique that allows layered models (images) of details to be acquired. Most commonly, it is used in research laboratories and throughout the process of the product quality inspection. The paper delivers findings of the preliminary investigation into the assessment of health/maintenance status of gas turbine blades by means of the X-ray computed tomography. The results gained have been successfully verified using the metallographic examination techniques. It has been found that the radiographic imaging method enables recognition of types, sizes, and locations of internal faults in the blades while generating three-dimensional images thereof. Presented are capabilities of the high-resolution X-ray inspection machine with computed tomography (CT), V/tome/x, furnished with a 300 kV tube, and the CT data processing capabilities of the VG Studio Max software solution, high-performance CT reconstruction included (using an optional module). At the same time work is under way with the X-ray tube for nanotomography with the 0.5 m resolution to examine, in particular, modern composite materials.
    Źródło:
    Journal of KONES; 2013, 20, 3; 89-96
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Shooting Tests of Target Perforating Ability, Performed on Cast Concrete Cylinders
    Autorzy:
    Habera, Łukasz
    Hebda, Kamil
    Koślik, Piotr
    Sałaciński, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1062821.pdf
    Data publikacji:
    2020
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    shaped charge
    axially-symmetric elliptical liner
    hexogen
    perforation channel
    concrete
    X-ray computer tomography
    3D numerical visualisation
    Opis:
    In this paper, the first results of the applicability of shaped charges with a single liner, of a conical and of an axially-symmetric elliptical shape, are compared. The shaped charges were of an analogous type. The outer diameter and the height of the shaped charges were 39 and 42 mm, respectively. The mass of the explosive (flegmatized hexogen) in these charges was 27 g. The charges with the conical liner were commercially available. All liners used in these tests were made according to the same technology, as well as being of the same material, i.e. electrolytic copper. Two series of tests were carried out for shaped charges with the elliptical liner, i.e. 11 and 12 shots, with or without a distance plate between the shaped charge and the concrete shooting model (core), respectively. For comparison, 4 shots for each of these configurations were executed for commercial shaped charges with a conical liner. The distance plate was made of mild steel and its dimensions were 50×50×10 mm. All of the concrete cores used were uniform in the shape of a cylinder, with diameter 160 ±10 mm and height 1200 ±10 mm, and were prepared in a single-batch process. The tests were completed under outdoor conditions at ambient temperature. of 0.1 mm, were used to create 3D numerical visualisation of the perforation channels in the concrete cores created by the tested shaped charges. The 3D images allowed the depths to be measured, together with the volumes and degrees of uniformity of these channels. On the basis of these images, it was determined that the volume of the perforation channels created when using shaped charges with an elliptical liner were in the range 230-557 cm3, while the volumes created by commercial shaped charges were in the range 105-201 cm3. This is because charges with an elliptically shaped liner produced longer perforation channels than their analogues with conical liners. The tested shaped charges enclosing a single liner of an axially-symmetric elliptical shape assures better opening of a hydrocarbon reservoir in the downhole conditions of oil and gas wells, as compared to its analogous traditional form, with a conical liner.
    Źródło:
    Central European Journal of Energetic Materials; 2020, 17, 4; 584-599
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of round Scots pine wood WC01 class using X-ray computer tomography
    Autorzy:
    Zatoń, Patrycja
    Kozakiewicz, Paweł
    Mańkowski, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/2171746.pdf
    Data publikacji:
    2022
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    X-ray computer tomography
    quality of round wood
    Scots pine wood
    density of wood
    annual rings
    moisture content of wood
    Opis:
    Investigation of round Scots pine wood WC01 class using X-ray computer tomography. Scots pine is the most widespread type of wood in Poland with wide industrial use. The typical starting material used for the production of layered floor elements are logs of WC01 class (class according to the Polish Standard PN-D-95008: 1992 and Order no 72 - GM-900-5 / 2013 of General Director of the State Forests in Poland). Using X-ray computed tomography, tests of fresh wood in the bark were carried out, confirming the full suitability of this technique for the precise assessment of wood density as well as its grain and distribution of anatomical defects (knots). The different level of humidity of sapwood and heartwood in fresh wood is visible in tomographic images and translates into a much higher recorded density of the wetter zone of sapwood. Calibration of the tomograph used made it possible to convert the Hounsfield density scale into actual densities expressed in kg/m3.
    Badania okrągłego drewna sosnowego klasy WC01 z zastosowaniem rentgenowskiej tomografii komputerowej. Sosna zwyczajna to najbardziej rozpowszechniony gatunek drewna w Polsce o szerokim zastosowaniu przemysłowym. Typowym surowcem wyjściowym stosowanym do produkcji warstwowych elementów podłogowych są kłody klasy WC01. Przy wykorzystaniu rentgenowskiej tomografii komputerowej przeprowadzono badania świeżego drewna w korze, potwierdzając pełną przydatność tej techniki do precyzyjnej oceny gęstości drewna a także jego słoistości i rozmieszczenia wad anatomicznych (sęków). Różny poziom wilgotności drewna bieli i twardzieli w świeżym drewnie jest doskonale widoczny w obrazach tomograficznych i przekłada na zdecydowanie wyższą odnotowaną gęstość wilgotniejszej strefy drewna bielastego. Wzorcowanie zastosowanego tomografu w danym trybie nastaw pozwoliło na przeliczenie skali gęstościowej Hounsfilda na rzeczywiste i jednocześnie praktyczne wartości gęstości wyrażone w kg/m3.
    Źródło:
    Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2022, 117; 97--105
    1898-5912
    Pojawia się w:
    Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Technical note. The concept of a computer system for interpretation of tight rocks using X-ray computed tomography results
    Autorzy:
    Habrat, M.
    Krakowska, P.
    Puskarczyk, E.
    Jędrychowski, M.
    Madejski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/178712.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    tight gas
    shale gas
    X-ray computed tomography
    tight rocks
    computer system for rock analysis
    Opis:
    The article presents the concept of a computer system for interpreting unconventional oil and gas deposits with the use of X-ray computed tomography results. The functional principles of the solution proposed are presented in the article. The main goal is to design a product which is a complex and useful tool in a form of a specialist computer software for qualitative and quantitative interpretation of images obtained from X-ray computed tomography. It is devoted to the issues of prospecting and identification of unconventional hydrocarbon deposits. The article focuses on the idea of X-ray computed tomography use as a basis for the analysis of tight rocks, considering especially functional principles of the system, which will be developed by the authors. The functional principles include the issues of graphical visualization of rock structure, qualitative and quantitative interpretation of model for visualizing rock samples, interpretation and a description of the parameters within realizing the module of quantitative interpretation.
    Źródło:
    Studia Geotechnica et Mechanica; 2017, 39, 1; 101-107
    0137-6365
    2083-831X
    Pojawia się w:
    Studia Geotechnica et Mechanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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