A low-re RSTM model for computations of heat transfer and fluid flow for impingement and convective cooling
Author
Summary, in English
A new Reynolds stress transport model (RSTM) aimed for engineering applications is proposed with consideration of near-wall turbulence. This model employs the SSG pressure strain term, the ω equation, and the SST model for the shear stresses at the near-wall region (say y<sup>+</sup> less than or equal 30). The models are selected based on the following merits: The SSG RSTM model performs well in the fully turbulent region and does not need the wall normal vectors; the ω equation can be integrated down to the wall without damping functions; The SST model is a proper two-equation model that performs well for flows with adverse pressure gradient, while most two-equation models can have a good prediction of the shear stresses. A function is selected for the blending of the RSTM and SST. Three cases are presented to show the performance of the present model: (1) fully developed channel flow with Reτ = 395, (2) backward-facing step with an expansion ratio of 1.2 and Re = 5,200 base on the step height, (3) circular impingement with the nozzle-to-wall distance H = 4D and Re = 20,000.
Department/s
Publishing year
2004
Language
English
Pages
429-438
Publication/Series
Proceedings of the ASME Turbo Expo 2004
Volume
3
Document type
Conference paper
Publisher
American Society Of Mechanical Engineers (ASME)
Topic
- Energy Engineering
Keywords
- Stagnation region
- Reynold stress
- Impingment
- Convective cooling
- Cooling ducts
Conference name
2004 ASME Turbo Expo
Conference date
2004-06-14 - 2004-06-17
Conference place
Vienna, Austria
Status
Published