Wszystkie pola: rotating risk - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Effect of magnetic field dependent viscosity on the unsteady ferrofluid flow due to a rotating disk
Autorzy:: Bhandari, A.
Powiązania:: https://bibliotekanauki.pl/articles/266158.pdf
Data publikacji:: 2020
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: ferrofluid
lepkość
rotacja
MFD viscosity
rotating risk
Opis:: The effect of magnetic field dependent viscosity on ferrofluid flow due to a rotating disk is studied in the presence of a stationary magnetic field. The results for velocity profiles for various values of MFD viscosity parameter are shown graphically. These results are compared with the ordinary case when the applied magnetic field is absent. Besides, the shear stress on the wall of the disk and its surface is calculated numerically.
Źródło:: International Journal of Applied Mechanics and Engineering; 2020, 25, 2; 22-39
1734-4492
2353-9003
Pojawia się w:: International Journal of Applied Mechanics and Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: A method of estimating the risk of a catastrophic failure to engines rotating members as related to fatigue - an outline
Autorzy:: Tomaszek, H.
Żurek, J.
Jasztal, M.
Powiązania:: https://bibliotekanauki.pl/articles/243106.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: risk of failure
fatigue
load spectrum
probability density
stress intensity factor
Opis:: The paper has been intended to introduce a probabilistic method to estimate - from the standpoint of fatigue - the risk of a catastrophic failure to rotating (moving) members of an aircraft engine, i.e. to compressor blades. It has been assumed that there is a hidden defect in the material's structure, which initiates a small-size crack. Load-affected, the crack keeps growing. The crack propagation dynamics, when approached in a deterministic way, remains consistent with the Paris formula. The crack growth is effected by some random load characterised with the servicing load spectrum. While determining the load spectrum, all possible operational events are taken into account, excluding ones that could result in an immediate damage to the component. It has been assumed that random instances of load increase, which may result in an immediate damage, compose a separate set of events; hence, they have not been taken into account in this model. A partial differential equation of the Fokker-Planck type has been used to describe randomly approached dynamics of crack propagation. Having solved this equation enables a density function of the fatigue crack length to be found. This function, in turn, has been used to determine the risk of a catastrophic failure to a compressor blade. Furthermore, this function can also be used to find safe service life of the structure under consideration.
Źródło:: Journal of KONES; 2007, 14, 2; 505-511
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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