Abstract
Aerodynamic shape optimization of natural laminar flow (NLF) nacelle was studied using extended free-form deformation (EFFD) technique. An parameterization method for nacelle section based on EFFD using Bernstein base functions was implemented. γ-θ transition model coupling with k -ε shear stress transport (SST) turbulent model was used for transition prediction. An optimization system for NLF nacelle design was established in combination with EFFD, a hybrid grid deformation method, Kriging surrogate model and an improved particle swarm optimization. Both flow-through nacelle and powered nacelle were optimized using the optimization system. Optimized flow-through nacelle maintained a laminar flow about 48% and its drag coefficient was 0.000 3 less than initial flow-through nacelle. Powered nacelle maintained a 41% laminar flow after optimization. These results indicate that the optimization system is applicable in NLF nacelle design.
| Original language | English |
|---|---|
| Pages (from-to) | 2311-2320 |
| Number of pages | 10 |
| Journal | Hangkong Dongli Xuebao/Journal of Aerospace Power |
| Volume | 29 |
| Issue number | 10 |
| DOIs | |
| State | Published - 1 Oct 2014 |
Keywords
- Aerodynamic shape optimization design
- Extended free-form deformation (EFFD)
- Kriging
- Natural laminar flow nacelle
- Particle swarm optimization(PSO)
- Transition model