Abstract This paper investigates cracking failure of the casing tube. There were longitudinal cracks in heavy oil thermal recovery well occurred an field. The fracture cause was analyzed by macrographic observation, chemical composition analysis, mechanical property test, metallographic scanning electron microscope (SEM) and residual stress calculation. results showed that crack failed originat...

Computer simulation of injection moulding process is a powerful tool for optimisation moulded part geometry, mould design and processing parameters. One the most frequent faults parts their warpage, which result uneven cooling conditions in cavity as well after ejection from down to environmental temperature. With computer it possible predict potential areas warpage apply remedies compensate/mi...

1Division of Plastic Surgery, Ottawa Hospital-Civic Campus, 2University of Ottawa, Faculty of Medicine Correspondence and reprints: Dr Michael Bell, The Ottawa Hospital, 402 – 1919 Riverside Drive, Ottawa, Ontario K1H 1A2. Telephone 613-739-5424, fax 613-739-7168, e-mail [email protected] Skin contact of breast prostheses is considered by many to be a significant cause of ongoing subclinical i...

The casing of large electrical generators can be deformed slightly by the rotor's magnetic field. The sound emission produced by these periodic deformations, which could possibly exceed guaranteed noise emission limits, is analyzed analytically and numerically. From the deformation of the casing, the normal velocity of the generator's surface is computed. Taking into account the corresponding s...

Turbo-expander is the most crucial and expensive component in Organic Rankine Cycle (ORC) power generation systems. The turbine engineering, design and research development process for ORC system is costly, time-consuming, and difficult for new-entrants in the ORC field. This paper investigates the re-design and retrofit of an off-the-shelf turbocharger for use in a 1 kW ORC system. The expande...

We describe the design, fabrication, and testing of a 1.6 mm thick scleral contact lens providing both 1× and 2.8× magnified vision paths, intended for use as a switchable eye-borne telescopic low-vision aid. The F/9.7 telescopic vision path uses an 8.2 mm diameter annular entrance pupil and 4 internal reflections in a polymethyl methacrylate precision optic. This gas-impermeable insert is cont...

CFD (Computational Fluid Dynamic) is today standard procedure for simulating and analysing fluid flow through hydraulic machines. This is a process where fluid flow domain is divided into many small volumes where governing equations are converted into algebraic equations, which can be solved numerically. Computational result strongly depends on methods used for converting governing to algebraic...