Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: SAA

Sortuj według:

Ogranicz wyniki do:

Force interaction of boiling dispersed emulsion particles

Klimov R. A.

Journal of New Technologies in Environmental Science

2018

Vol. 2, nr 2

60--67

In the industry lubricating fluids are widely used, mostly they reduce the wear of cutting tools and improve the quality of working surface, both in metal processin g technology and in other industries [1-3]. To achieve the greatest effect lubricating fluids must have a good surface wettability. This is achieved by introducing into the lubricating fluids the corresponding surface active agents (SAA), which also increase the cooling capacity of the medium. The adsorption phenomenon is based on the lubricating effect of various components of lubricating fluids. For liquids the adsorption is determined by the change in surface tension σ from the concentration of SAA. The desorption phenomena of SAA and particles aggregation of dispersed phase of lubricating fluids, which is an emulsion, determines sedimentation stability of emulsion and its further use [2, 4-7]. To reduce costs it is economically feasible to reuse spent lubricating fluids, but for this, their composition must be brought to normative, i.e. to clear it of mechanical impurities and also get the most stable structure for sedimentation, i.e. it is necessary to obtain the smallest size of the dispersed phase [5, 8-10]. Existing methods for calculating the processes of emulsification and homogenization of lubricating fluids are based on the dynamics of a single particle, which either boils with a sudden change in external parameters [4-6, 8, 11], or is subjected to the action of dynamic impact during the acceleration (deceleration) of flow, as well as is subjected to mechanical effects [7, 9, 11]. The examination of the dynamic interaction of two particles while boiling of light boiling component of the emulsion is given in [12]. Therefore, the study and development of the theoretical grounds of multitude drops breakup of discretely distributed phase is important for the determination of the optimal dispersion modes which results in a significant reduction in energy costs both during the grinding and crushing process, as well as reduction of the financial costs with repeated use of the same lubricating fluids, previously prepared before each cycle of use.

Zarys metody tworzenia i badania modeli symulacyjnych szybkostrzelnych armat automatycznych w celu pozyskiwania danych o skutkach zmian parametrów diagnostycznych.

Idziaszek Z., Jasztal M.

Zagadnienia Eksploatacji Maszyn

2005

Vol. 40, nr 2

155-168

W artykule przedstawiono i omówiono zarys metody tworzenia (budowy) i badania modeli symulacyjnych szybkostrzelnych armat automatycznych (SAA). Metoda umożliwia pozyskiwanie danych o zmianach parametrów kinematycznych i dynamicznych SAA przy zadawanych zmianach wartości parametrów diagnostycznych. Pozyskanie tego typu danych umożliwia dokonanie oceny trwałości całkowitej i resztkowej SAA wg wcześniej opracowanych metod. Na wstępie określone zostały założenia dotyczące metody modelowania badanego mechanizmu oraz zakresu prowadzonych symulacji. Na tej podstawie dokonano wyboru środowiska do modelowania oraz obliczeniowego, które umożliwia prowadzenie analizy kinematycznej, jak i dynamicznej mechanizmów SAA w założonym zakresie. Pokazano specyfikę metod tworzenia (budowy) modelu obiektu, jak i prowadzenia badań symulacyjnych w wybranym środowisku modelowania i obliczeniowym. Przykładową weryfikację metody tworzenia (budowy) i badania modeli symulacyjnych dokonano dla 30 mm lotniczej armaty automatycznej NR-30. Podany przykład zrealizowano przy użyciu oprogramowania SolidEdge oraz VisualNastran.

In the paper, an outline of the method for creation and investigation of simulative models of the high rate fire automatic cannons (HRFAC) was presented. The worked out method makes possible to acquire the database on changes of kinematical and dynamic parameters of the HRFAC with pre-assigned changes of the diagnostic parameters value. The acquired data allows for evaluation of the total and remaining the HRFAC durability in compliance with worked method out. First, the assumptions about the method of modelling of the investigated mechanisms and a scope of the conducted investigations were presented. Then the environment and tools for modelling and calculations were selected, which allow for kinematical and dynamic analysis of the HRFAC mechanisms in the complex state. The paper presents specifics of the method of the object model creation as well as simulation investigations in the pre-selected modelling and calculation environment. A sample of a method verification of the object model creation and investigation accomplished for the NR-30 aviation automatic cannon of the 30-mm was presented. The example was performed by the SolidEdge and VisualNASTRAN system software.