A UNIFIED THEORETICAL-COMPUTATIONAL APPROACH FOR VISCOUS UNSTEADY ROTOR AERODYNAMICS

A unified theoretical-computation approach for viscous unsteady aerodynamic analysis is presented. This approach is shown to be valid under general circumstances and to possess the ability of confining aerodynamic analysis to the viscous region of the flow. In addition, it is shown that the approach permits the flow zones coexisting in the viscous region to be analyzed individually. Predictive methods using the unified approach which are described are shown to be highly efficient and accurate. Selected results for the blade-vortex interaction problem and the oscillating airfoil problem are presented and discussed.