... on the performance is studied through wall-resolving large Eddy simulations of a rotor with large relative tip gap size. The simulations are performed in a rotating frame with rotation accounted for through a Coriolis force term. In a first step, experimental results are used to provide validation. The main part...

... February 15, 2019. Assoc. Editor: Kenneth Hall. 24 09 2018 28 12 2018 31 12 2018 Coriolis force centrifugal buoyancy serpentine passage rib turbulators liquid crystal thermography Higher turbine inlet temperature is required to achieve higher gas turbine efficiency...

...Mohammad A. Elyyan; Danesh K. Tafti Large-eddy simulations are used to investigate Coriolis forces effect on flow structure and heat transfer in a rotating dimpled channel. Two geometries with two dimple depths are considered, δ = 0.2 and 0.3 of channel height, for a wide range of rotation number...

... by the ribs. However, in the outlet pass, Coriolis forces markedly affected the rib induced secondary flow field. The influence of rotation on heat transfer was visible in particular in the bend region and in the second pass directly downstream of the bend. aerospace engines computational fluid dynamics...

... transfer induced by the Coriolis force generally perceived in a ribbed or smooth channel is less evident in a pin-fin channel. 16 07 2009 05 09 2009 19 10 2010 19 10 2010 blades channel flow Coriolis force gas turbines rotational flow turbulence gas turbine blade...

..., and the deflection angles on the suction surface are larger than those on the pressure surface. This was attributed to the combined action of the Coriolis force and centrifugal force. (3) In the rotating case, for CO 2 injection, the magnitude of heat transfer coefficient on the pressure surface is reduced compared...

... that the heat/mass transfer characteristics were influenced by the Coriolis force, the decrement of the main flow rate, and the secondary flow. In the 90 deg angled ribbed channel, the heat/mass transfer reduced on the leading surface with an increment in the rotation number, but it increased on the trailing...

...M. Nikolic; E. P. Petrov; D. J. Ewins The problem of estimating the mutual interaction of the effects of Coriolis forces and of blade mistuning on the vibration characteristics of bladed disks is addressed in this paper. The influence of different degrees of mistuning on forced response...

..., Z ∕ Dh = 0 corresponds to inner surface at location P5, and Z ∕ Dh = 1 corresponds to outer surface at location P5. 05 05 2004 24 05 2005 rotational flow pipe flow channel flow blades turbines turbulence Coriolis force ducts cooling...

... transfer augmentation ratio 10% to 20% over the action of Coriolis forces alone. However, it does not have any significant effect at the leading side of the duct. The overall effect of buoyancy on heat transfer augmentation for the ribbed duct is found to be less than 10% over the effect of Coriolis forces...

... of the duct which isolates the boundary layers adjacent to the duct wall except for the region in the U bend. In spite of this, the flow structure redistributes slightly with rotation due to the Coriolis force. With the assistance of Fig. 3 , it is found that the Coriolis force acts toward the trailing...

... 01 February 2001 gas turbines flow simulation subsonic flow stress analysis deformation tensors Coriolis force flow separation turbulence Computational Fluid Dynamics (CFD) coupled to turbomachinery specific steady 1 2 3 and unsteady 4 5 6 models, and supported...

.... Pressure is computed using a hybrid SIMPLER/PISO approach, which satisfies the continuity of mass and momentum simultaneously at every time step. The second-moment solutions show that the secondary flows induced by the angled ribs, rotating buoyancy, and Coriolis forces produced strong nonisotropic...