Abstract
We are developing methods to predict the dynamics of the flow field above a NACA-4412 airfoil using real-time measurements of the pressure from the surface of the airfoil only. Through Proper Orthogonal Decomposition (POD) and modified Linear Stochastic Measurement (mLSM) low-dimensional techniques (Lumley (1967), Adrian (1975), Taylor & Glauser (2004)) these pressure measurements are coupled to Particle Image Velocimetry (PIV) data of the flow to estimate the time dependent coefficients describing the flow. Based on a least-squares technique applied to the POD spatial modes, we obtain a system of ODEs that are solved to get the time-evolution of the POD coefficients, whereby an estimate of the evolution equation of the flow is obtained. This low-dimensional estimated plant will be used to explore different Proportional, Integral & Derivative (PID) control parameters and will enable us to implement a controller of the flow state above the airfoil using leading-edge zero net-mass flow actuators while pitching the airfoil.
| Original language | English (US) |
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| Pages | 105-109 |
| Number of pages | 5 |
| State | Published - 2005 |
| Event | 4th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 4 - Williamsburg, VA, United States Duration: Jun 27 2005 → Jun 29 2005 |
Other
| Other | 4th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 4 |
|---|---|
| Country/Territory | United States |
| City | Williamsburg, VA |
| Period | 6/27/05 → 6/29/05 |
ASJC Scopus subject areas
- Fluid Flow and Transfer Processes