Original scientific paper This paper shows a thermal and tension analysis of a brake disc for railway vehicles. The FEM (Finite Element Method) was used to carry out the analysis. The analysis deals with one cycle of braking – braking from maximum velocity to a standstill, cooling off faze and then accelerating to maximum velocity and again braking to a standstill. This case of braking represen...

This paper presents the optimal operation of a photovoltaic pumping system. The operation of a permanent magnet brushless DC motor driving a centrifugal pump is investigated. The motor is controlled through a hysteresis current loop and an outer speed loop with a PI type controller. The proportional and integral gains are set to their optimal values. In order to optimise the overall system effi...

A three-dimensional mathematical and physical model coupling with the heat transfer and the flow of molten metal in the centrifugal casting of the high speed steel roll was established by using CFD software FLUENT. It can be used to analyze the distribution of the temperature filed and the flow filed in the centrifugal casting under the gravity, the electromagnetic stirring force and the centri...

In this study, to accurately predict cavitation of a centrifugal pump, numerical analysis was compared with experimental results modeled on a small industrial centrifugal pump. In this study, numerical analysis was compared with experimental results modeled on a small industrial centrifugal pump for reliable prediction on cavitation of a centrifugal pump. To improve validity of the numerical an...

This paper deals with the design and performance analysis of centrifugal pump. In this paper, centrifugal pump is analyzed by using a single-stage end suction centrifugal pump. Two main components of a centrifugal pump are the impeller and the casing. The impeller is a rotating component and the casing is a stationary component. In centrifugal pump, water enters axially through the impeller eye...

Probabilistic failure risk analysis of aeroengine life-limited parts is great significance for flight safety. Current probabilistic uses equal amplitude load calculations conservative estimation, avoiding inclusion the interference effect analyzing random loads due to its massive computational complexity and leading reduced accuracy. Here, an efficient algorithm established solve this problem, ...

Centrifugal casting is one of the advanced casting branches widely used in the metallurgical industry in which the centrifugal force helps strengthen the workpiece material. The present work attempt to study the effect of the horizontal and vertical centrifugal casting parameters included the centrifugal mold rotation speeds and G-factors values on the quality of the product. The work has been ...

the goal of this research is the derivation of method for evaluation of efficiency improvement potential for district heating systems with focus on variable speed centrifugal pump. the effectiveness of the usage of the proportional pressure control is compared with the constant pressure control. this is why, energy calculation analyses have been realized for variable speed centrifugal pumps, an...

Different methods of surfacing are using to strengthen machine parts. The process simultaneous induction consider in the article. will perform with centrifugal rotation compared traditional scheme. disk is located a fixed position during entire according rotational movement carrying out certain angular velocity at time fusion metal layer. working part increased due rotation. Because layer molte...

THE pathway of the centrifugal (efferent, antidromic) nerves has been studied histologically in the optic nerves, chiasm, and optic tracts of a patient who had both eyes enucleated 50 years before. Centrifugal fibres in the optic nerve of animals have been known to exist for a long time (Cajal, 1894; Dogiel, 1895), and this fact is supported by recent physiological observations (Granit, 1955; D...