Loading...
Please wait, while we are loading the content...
Similar Documents
Prediction of relaminarization effects on turbine blade heat transfer
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Boyle, R. J. Giel, P. W. |
| Copyright Year | 2001 |
| Description | An approach to predicting turbine blade heat transfer when turbulent flow relaminarizes due to strong favorable pressure gradients is described. Relaminarization is more likely to occur on the pressure side of a rotor blade. While stators also have strong favorable pressure gradients, the pressure surface is less likely to become turbulent at low to moderate Reynolds numbers. Accounting for the effects of relaminarization for blade heat transfer can substantially reduce the predicted rotor surface heat transfer. This in turn can lead to reduced rotor cooling requirements. Two-dimensional midspan Navier-Stokes analyses were done for each of eighteen test cases using eleven different turbulence models. Results showed that including relaminarization effects generally improved the agreement with experimental data. The results of this work indicate that relatively small changes in rotor shape can be utilized to extend the likelihood of relaminarization to high Reynolds numbers. Predictions showing how rotor blade heat transfer at a high Reynolds number can be reduced through relaminarization are given. |
| File Size | 1262868 |
| Page Count | 22 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20020014362 |
| Archival Resource Key | ark:/13960/t2896518k |
| Language | English |
| Publisher Date | 2001-09-01 |
| Access Restriction | Open |
| Subject Keyword | Fluid Mechanics And Thermodynamics Navier-stokes Equation Turbulent Flow Turbine Blades Computational Fluid Dynamics Laminar Flow Rotor Blades Turbomachinery Turbulence Models Reynolds Number Predictions Heat Transfer Pressure Gradients Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
