Techniques for spherical osteotomy, such as rotational acetabular osteotomy, can help orthopaedic surgeons correct bony deformities and remove spherical acetabular components. Curved chisels are used during a spherical osteotomy, but they require skill and have a potential risk of damaging blood vessels or nerves. In order to perform a precise, quick and safe spherical osteotomy, we have develo...

The article solves problem of synthesizing a lever-cam motion transducer that converts rotary input shaft pump into its vanes required for volumetric pumping gases and liquids. Analytical expressions theoretical profile cam the movement vane are obtained. was built according to analytical expressions.

................................................................................................................................... xi Acknowledgements ................................................................................................................. xii Chapter 1 General Introduction ...................................................................................................

The development of the geared and ultra-high bypass ratio engines has increased demands operational envelope for low-pressure system in commercial aircraft engines. This, turn, requires improvement existing design turbine rear structure (TRS) with further experimental investigation flow. This paper presents a first comprehensive study effect 3D polygonal shroud modern TRS including several vane...

We demonstrate experimentally the x-ray lithography techniques to fabricate micro structures on curved surfaces such as convex and cylinder surfaces. In order to realize fabricate micro structures on curved surface, two x-ray lithography methods are described. One method is double x-ray exposures method with moving resist stage, the other is flexible mask on curved surface with rotating the res...

Increased operating temperatures and higher efficiency in gas turbines and jet engines can reduce CO2 emission, thus contributing to the prevention of global warming. To achieve this goal, it is essential to improve the properties of high temperature materials. Various Ni-base superalloys are used for high-temperature components, e.g., combustors and high-pressure turbine blades and vanes, that...

A method is developed for solving the two dimensional Helmholtz equation in a duct with varying cross-section region bounded by a curved top and flat bottom, having one region inside. To compute the propagation of sound waves in a curved duct with a curved internal interface is difficult problem. One method is to transform the wave equation into a solvable form and making the curved interface p...

In Sliding Vane Rotary Compressors, as well as in most of positive displacement machines, the oil is injected to accomplish sealing and lubrication purposes. However, the oil injection could produce an additional outcome during the compression phase with a great saving potential from the energetic point of view. Being the air inside the cell at a higher temperature than the oil injected, a cool...