Journal ArticleDOI
Prediction of Turbulent Flow and Heat Transfer in a Radially Rotating Square Duct
C. Prakash,R. Zerkle +1 more
TLDR
In this article, the authors dealt with the numerical prediction of turbulent flow and heat transfer in a rotating duct of square cross section, where the Coriolis and the centrifugal buoyancy effects were considered.Abstract:
The present study deals with the numerical prediction of turbulent flow and heat transfer in a rotating duct of square cross section The axis of rotation is normal to the axis of the duct, and the flow is radially outward The duct is smooth, of finite length, and the walls are isothermal at a temperature greater than the temperature of the incoming fluid Both the Coriolis and the centrifugal-buoyancy effects are considered; the problem is three dimensional and fully elliptic The predicted flow field is found to be quite complex, consisting of secondary cross-stream flows due to the Coriolis effectsread more
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Proceedings ArticleDOI
Heat transfer in rotating serpentine passages with trips normal to the flow
TL;DR: In this paper, the effects of buoyancy and Coriolis forces on heat transfer in turbine blade internal coolant passages were investigated with a large scale, multipass, heat transfer model with both radially inward and outward flow.
Journal ArticleDOI
Convective Heat Transfer and Aerodynamics in Axial Flow Turbines
TL;DR: In this paper, the authors present a review of the influence of turbine aerodynamics on heat transfer predictions and compare the performance of two-dimensional and three-dimensional Navier-Stokes codes to predict the proper trends of the time-averaged and unsteady pressure field.
Patent
Closed circuit steam cooled bucket
Ariel Caesar Prepena Jacala,Richard Mallory Davis,Michael Adelbert Sullivan,Chiu Rong-Shi Paul,Fred W. Staub +4 more
TL;DR: In this paper, a method of determining a configuration for steam cooling passages for a bucket stage in a gas turbine is also provided which includes, in one example, the steps of determining combustion gas inlet temperature and mass flow rate of combustion gases passing through the gas turbine stage; taking into account Coriolis and buoyancy secondary flow effects in the steam coolant caused by rotation of the bucket stage; and configuring the radial outflow coolant passages to have a size and shape sufficient to produce aspect ratios of about 3.3 to 1 and buoyancy numbers in the
Journal ArticleDOI
Effect of model orientation and wall heating condition on local heat transfer in a rotating two-pass square channel with rib turbulators
TL;DR: In this article, the influence of channel orientation and wall heating condition on the local surface heat transfer coefficient in a rotating, two-pass, square channel with 60° and 90° ribs on the leading and trailing walls were investigated for Reynolds numbers from 2500 to 25 000 and rotation numbers from 0 to 0.352.
Journal ArticleDOI
A Numerical Study of Flow and Heat Transfer in a Smooth and Ribbed U-Duct With and Without Rotation
TL;DR: In this article, the three-dimensional flow and heat transfer in a U-shaped duct of square cross section under rotating and non-rotating conditions was investigated. But the authors focused on the U-shape duct and did not consider the nonrotating condition.