The corrosion damage and leakage of heat transfer tube steam generator were important factors nuclear power accident, which is closely related to the national production safety people's life property. influence size change cylindrical defect on burst pressure inconel690 alloy was studied by finite element simulation experimental measurement. According test data, relationship between parameter e...

A unique in-house designed experimental apparatus for investigation of nucleation of droplets in CCS relevant systems is being developed by our team. The nucleation is measured with the help of a rapid pressure drop within an expansion chamber. In this study, a CO2 branch representing an important part of the mixture preparation device (MPD) was designed, assembled and tested. MPD is intended f...

Nowadays, functionally graded materials (FGM) are widely used in many industrial, aerospace and military fields. On the other hand, the interest in the use of shrink-fitted assemblies is increasing for designing composite tubes, high-pressure vessels, rectors and tanks. Although extensive researches exist on thick-walled cylindrical shells, not many researches have been done on shrink-fitted th...

Abstract Directed energy deposition (DED) was used to produce niobium carbide (NbC)‐reinforced Ti6Al4V (Ti64) metal–matrix‐composite (MMC) structures. The objective improve upon Ti64's wear and oxidation resistance. characterization techniques consisted of scanning electron microscopy (SEM), backscattered (BSE) imaging, energy‐dispersive X‐ray spectroscopy (EDS), diffraction analysis (XRD), the...

In the field of cold bending, it is necessary to use ball mandrels, especially bend thin-walled tubes with a small radius. However, bending process mandrel complex and expensive, easy jam core inside tube. To solve these issues, we designed two kinds hollow non-ball schemes low stiffness that were suitable for radius tubes. We evaluated forming quality numerically influence section length thick...

In flooded evaporators, refrigerants are boiling outside the tubes. This paper focuses on the bubbly two-phase flow characteristics in twisted tube bundles. The quasi 3-D high speed video method and computational fluid dynamics are carried out to understand the effects which angles between the major axis of the cylinder and vertical direction ( ) and bubble diameters have on the motion behavio...