Abstract
The reduction of pressure loss and wake in a low-pressure turbine test rig containing turbine exit guide vanes (TEGVs) with laser-processed riblet surface were numerically and experimentally investigated.
Riblets are streamwise grooved surfaces which reduce the viscous drag in a turbulent boundary layer, similar to shark-skin. An optimized riblet design was calculated by computational fluid dynamics (CFD), and the designed riblets were laser-processed directly onto the suction side of steel TEGVs. The TEGVs with and without riblets were installed on the test rig, and the effect of the riblets on the flow were
measured. Pressure loss around the TEGVs was reduced by 6.3 %. This result shows the benefit of laser-processed riblets directly fabricated on 3 -dimensionally curved parts, such as gas turbine blades, which operate at high temperatur
Riblets are streamwise grooved surfaces which reduce the viscous drag in a turbulent boundary layer, similar to shark-skin. An optimized riblet design was calculated by computational fluid dynamics (CFD), and the designed riblets were laser-processed directly onto the suction side of steel TEGVs. The TEGVs with and without riblets were installed on the test rig, and the effect of the riblets on the flow were
measured. Pressure loss around the TEGVs was reduced by 6.3 %. This result shows the benefit of laser-processed riblets directly fabricated on 3 -dimensionally curved parts, such as gas turbine blades, which operate at high temperatur
| Translated title of the contribution | Numerical and Experimental Investigation of Laser Processed Riblets on Turbine Exit Guide Vanes of Gas Turbine Test Rig and the Impact on the Performance |
|---|---|
| Original language | Japanese |
| Pages (from-to) | 33-40 |
| Number of pages | 8 |
| Journal | Nikon Research Report |
| Volume | 4 |
| Publication status | Published - 2022 |
Keywords
- Riblets
- Laser Processing
- CFD
- Drag Reduction
- Power Generation Efficienc