... engines hot streaks ducts turbine center frame Österreichische Forschungsförderungsgesellschaft 10.13039/501100004955 FFG D-1319000046 Since the advent of aero engines, the development of gas turbines was accelerated by the strict environmental standards and the demand for higher...

... the flow leaving the high pressure turbine to the low pressure turbine at a larger diameter without any severe loss generating separation or flow disturbances. To reduce costs and weight this turbine duct has to be as short as possible. This results in superaggressive (very high diffusion) S-shaped...

... on the aerovanes (around 5% of P 01 ). 08 09 2010 20 10 2010 27 05 2011 27 05 2011 aerodynamics blades ducts The quest for higher performances and durability for modern aero-engines requires the understanding of the complex flow field experienced by the gas...

... that the flow field is two dimensional and incompressible in the ducts between blade rows although the steady-state density is permitted to change across the blade rows. The resulting stall parameter contains terms that relate to the slope of the pressure rise characteristic of the blade rows and the inertia...

... of the channel walls are also presented. The mass transfer data from the curved wall channels are compared to those from a smooth 4:1 rectangular duct with similar flow parameters. The local mass transfer data are analyzed mainly for the fully developed region, and area-averaged results are presented...

...Anant Shah; Danesh K. Tafti A ribbed square duct ( P ∕ e = 10 , e ∕ D h = 0.10 ) subjected to sand ingestion is studied using large-eddy simulations (LES). Particle sizes of 10 μ m , 50 μ m , and 100 μ m with nondimensional response times (normalized by friction velocity and hydraulic diameter...

... duct are denoted as the leading, trailing, inner, and outer sides. All walls are heated to a constant temperature. In this study, the range of rotation numbers considered was 0.0, 0.215, 0.43, 0.86, and 1.29. Density ratios of 0.13, 0.229, and 0.4, which correspond to wall temperatures of 344, 389...

...Evan A. Sewall; Danesh K. Tafti Large eddy simulation of the 180 deg bend in a stationary ribbed duct is presented. The domain studied includes three ribs upstream of the bend region and three ribs downstream of the bend with an outflow extension added to the end, using a total of 8.4 million cells...

... jets ducts orifices (mechanical) convection cooling gas turbines pipe flow The continuing pursuit of high inlet temperature in gas turbines requires highly sophisticated cooling techniques to maintain the metal temperatures below acceptable limits. Jet impingement is one of the most...