Details
| Original language | English |
|---|---|
| Pages (from-to) | 68-75 |
| Number of pages | 8 |
| Journal | International Journal of Gas Turbine, Propulsion and Power Systems |
| Volume | 11 |
| Issue number | 4 |
| Publication status | Published - 2020 |
| Event | International Gas Turbine Congress (IGTC) 2019 - Toranomon Hills Forum, Tokyo, Japan Duration: 17 Nov 2019 → 22 Nov 2019 |
Abstract
This paper presents an analysis of the vibration-induced effects on the aerofoil aerodynamics and boundary-layer development of a low-pressure-turbine blade. Large-eddy simulations of an MTUT161 low-pressure-turbine blade with imposed sinusoidal rigidbody oscillations were conducted for frequencies of 50 and 100 Hz as well as for a fixed reference blade. The oscillations are shown to impact both the time-averaged flow field and unsteady velocity fluctuations. These changes appear most markedly as a reduction in the stagnation-point pressure and a partial suppression of the separation bubble on the suction side of the aerofoil. The results suggest that the deterministic velocity fluctuations introduced by the oscillating blade promote transition on the suction side and expedite the generation of turbulence.
ASJC Scopus subject areas
- Engineering(all)
- Mechanical Engineering
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In: International Journal of Gas Turbine, Propulsion and Power Systems, Vol. 11, No. 4, 2020, p. 68-75.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Profile Aerodynamics of an Oscillating Low-Pressure–Turbine Blade
AU - Schwarzbach, Felix
AU - Mimic, Dajan
AU - Herbst, Florian
PY - 2020
Y1 - 2020
N2 - This paper presents an analysis of the vibration-induced effects on the aerofoil aerodynamics and boundary-layer development of a low-pressure-turbine blade. Large-eddy simulations of an MTUT161 low-pressure-turbine blade with imposed sinusoidal rigidbody oscillations were conducted for frequencies of 50 and 100 Hz as well as for a fixed reference blade. The oscillations are shown to impact both the time-averaged flow field and unsteady velocity fluctuations. These changes appear most markedly as a reduction in the stagnation-point pressure and a partial suppression of the separation bubble on the suction side of the aerofoil. The results suggest that the deterministic velocity fluctuations introduced by the oscillating blade promote transition on the suction side and expedite the generation of turbulence.
AB - This paper presents an analysis of the vibration-induced effects on the aerofoil aerodynamics and boundary-layer development of a low-pressure-turbine blade. Large-eddy simulations of an MTUT161 low-pressure-turbine blade with imposed sinusoidal rigidbody oscillations were conducted for frequencies of 50 and 100 Hz as well as for a fixed reference blade. The oscillations are shown to impact both the time-averaged flow field and unsteady velocity fluctuations. These changes appear most markedly as a reduction in the stagnation-point pressure and a partial suppression of the separation bubble on the suction side of the aerofoil. The results suggest that the deterministic velocity fluctuations introduced by the oscillating blade promote transition on the suction side and expedite the generation of turbulence.
UR - http://www.scopus.com/inward/record.url?scp=85098464015&partnerID=8YFLogxK
U2 - 10.38036/JGPP.11.4_68
DO - 10.38036/JGPP.11.4_68
M3 - Article
AN - SCOPUS:85098464015
VL - 11
SP - 68
EP - 75
JO - International Journal of Gas Turbine, Propulsion and Power Systems
JF - International Journal of Gas Turbine, Propulsion and Power Systems
IS - 4
T2 - International Gas Turbine Congress (IGTC) 2019
Y2 - 17 November 2019 through 22 November 2019
ER -