This paper presents a study regarding the noise reduction of turbojet engine, in particular jet micro engine. The results measurement campaign are presented followed by performances analysis which is based on measured data test bench. Within tests, beside baseline nozzle other two nozzles with chevrons were tested and evaluated. First type foreseen eight triangular chevrons, length being L = 10...

A ação homologatória da sentença equatoriana no caso Chevron (SEC 8.542/2018) trouxe à tona debates em torno dos requisitos do juízo de delibação, inerente ao reconhecimento sentenças estrangeiras Brasil. Tendo conta esse contexto, o presente artigo pretende, inicialmente, luz desafios cooperação jurídica internacional na contemporaneidade, marcada pelo incremento das relações jurídicas plurico...

This paper is an analysis of a model for the structure in a liquid crystal medium that arises when the material is cooled from the smectic-A to the chiral smectic-C phase in a surface-stabilized cell with prescribed boundary conditions under a given electric field. This phenomenon causes V-shaped (chevron-like) defects to form in liquid crystal display devices and has attracted interest from bo...

background:   hallux valgus deformity is a common chronic problem in middle age and elderly. different surgical procedures have been introduced so far with their proposed indications for each. this study aimed to compare three   current procedures namely chevron osteotomy, scarf osteotomy and mcbride technique.     methods:   in this study, 44 patients were included from 2010 to 2013. all patie...

Fluidic chevrons use injected air near the trailing edge of a nozzle to emulate mixing and jet noise reduction characteristics of mechanical chevrons. While previous investigations of “first generation” fluidic chevron nozzles showed only marginal improvements in effective perceived noise levels when compared to nozzles without injection, significant improvements in noise reduction characterist...

ID No. : FC-168 ABSTRACT Fiber-reinforced self-healing ceramic (shFRC) [1] is considered to be most attractive candidate of next generation structural materials using at high temperature, e.g. turbine blade, exhaust component of car engine etc. The shFRCs consist of three components, which are oxide fiber bundle, oxide matrix and self-healing agent interlayer. As the self-healing is generated a...