Extensively used in modern gas turbine engines various applications, ranging from aerospace, marine and terrestrial propulsion to power generation pumping, the axial flow turbines have been continuously updated are now capable of high performances reliability. One drawback that has not yet resolved is poor performance at lower- than-nominal regimes. To solve these shortcomings, a new method imp...

The classical momentum solution for the optimum induced-flow distribution of a wind turbine in the presence of wake swirl can be found in many textbooks. This standard derivation consists of two momentum balances (one for axial momentum and one for angular momentum) which are combined into a formula for power coefficient in terms of induction factors. Numerical procedures then give the proper i...

The main purpose of this work is to conduct coupled CFD analysis of the steam flow in the secondary part of turbine and study thermal rotor/stator steady state. We consider a 11 stage high-pressure cylinder of a power steam turbine with extended terminal labyrinths. Domain of interest is only the secondary flow path of the cylinder, therefore the shroud and blades are beyond the scope of this w...

Axial flow pump system is widely used in marine jet propulsion equipment and stations along the river coastal areas. In order to explore safety reliability of axial system, especially axial-flow areas, response various extreme conditions. this paper, a high-precision full-feature test bench for built, model area manufactured. The experimentally tested under Then numerical predicting full charac...

Power enhancement technologies for gas turbines such as inlet fogging, interstage water injection, saturation cooling, inlet chillers, and combustor injection are being used by end users without evaluating the potentially negative effects these devices may have on the operational integrity of the gas turbine. Specifically, the effect of these add-on devices, off-design operating conditions, non...

In tidal two-way contra-rotating units, significant differences in performance often occur when arranging the front and rear impellers, which requires an optimized design of impellers. To solve this problem, by reducing blade inlet outlet angles, impact different angles on pump–turbines internal flow was explored, effects angle impellers counter-rotating pump were obtained. Afterward, streamlin...

Extensive Research and Development (R&D) within the tidal energy industry is pushing this sector towards commercial viability, with full scale prototypes starting to meet the challenges of the marine environment. This paper combines velocity data collected from Ramsey Sound (Pembrokeshire, Wales), with Computational Fluid Dynamics (CFD) to assess the impact of non-rectilinear flows on turbine r...

The article presents the results of development proposals to increase safety margin blades and efficiency a single-stage axial flow turbine compressor small-sized turbo-shaft engine being modernized with use multidiscipline optimization methods. Analysis initial version showed that working is significantly lower than required by strength standards. To eliminate problem encountered task blade wa...

A new mechanism responsible for structural life consumption due to resonant fatigue in turbine blades, or vanes, is presented and explained. A rotating blade or vane in a gas turbine can change its contour due to erosion and/or material build up, in any of these instances, the surface pressure distribution occurring on the suction and pressure sides of blades-vanes can suffer substantial modifi...