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In this work, numerical analysis was performed to predict the behaviour of high Reynolds number turbulent cross-flows used in film cooling applications. The geometry included one row of three discrete coolant holes inclined at 30 degrees to the main flow. In the computational model, the width of the channel was cut into one sixth and symmetry boundaries were applied in the centreline of the coolan
A numerical and experimental study of partial admission in a low reaction two-stage axial air test turbine is performed in this paper. In order to model one part load configuration, corresponding to zero flow in one of the admission arcs, the inlet was blocked at one segmental arc, at the leading edge of the first stage guide vanes. Due to the unsymmetrical geometry, the full annulus of the turbin
In this paper, the effects of axial gap distance between the first stage stator and rotor blades and multiblocking on aerodynamics and performance of partial admission turbines are analyzed numerically. The selected test case is a two stage axial steam turbine with low reaction blades operating with compressed air. The multiblocking effect is studied by blocking the inlet annulus of the turbine in
HTML clipboard Numerical analysis of partial admission in axial turbines is performed in this work. Geometrical details of an existing two stage turbine facility with low reaction blades is used for this purpose. For validation of the numerical results, experimental measurements of one partial admission configuration at design point was used. The partial admission turbine with single blockage had
Background. Climate change is the greatest threat to human health in the 21st century and healthcare contributes to approximately 5% of global greenhouse gas emissions. Intensive and perioperative care are particularly resource intensive. This thesis aimed to assess the climate and environmental impacts of perioperative and intensive care (Papers I–III) and to explore how environmental outcomes an
This chapter critically examines the pervasive belief that economic progress naturally leads to increased leisure time. While early 20th-century thinkers like John Maynard Keynes predicted a future of abundant free time driven by productivity gains, work hours in many high-income countries have stagnated or increased since the 1980s. The chapter argues that this paradox is not the result of indivi
Tudo o que comemos gera impactos ambientais: do uso do solo na lavoura, passando pelo transporte, processamento, consumo e descarte de embalagens e resíduos. Entender esse impacto ambiental da alimentação é complexo, mas já existem informações suficientes para orientar decisões mais bem informadas.
OBJECTIVE: To evaluate psychometric properties of newly developed hand and wrist proprioception tests.DESIGN: Cross-sectional and test-retest comparisons.SUBJECTS/PATIENTS: Twenty-six individuals (mean age 40 years) with wrist disability (> 3 months) due to traumatic injury or general instability.METHODS: Pointing acuity (with eyes open and closed), active joint position sense (in extension, flexi
BackgroundUmbilical cord arterial pH (UApH) is the most objective measurement of the metabolic condition of the infant at birth. However, studies have identified changes in UApH with advancing gestational age, as there is limited data examining UApH changes with different modes of birth. The objective was to establish reference values for UApH according to mode of birth and to investigate the infl
