| Grant number: | 17/02926-9 |
| Support Opportunities: | Regular Research Grants |
| Start date: | August 01, 2017 |
| End date: | March 31, 2021 |
| Field of knowledge: | Engineering - Aerospace Engineering - Aerospace Structures |
| Principal Investigator: | Flávio Donizeti Marques |
| Grantee: | Flávio Donizeti Marques |
| Host Institution: | Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil |
| City of the host institution: | São Carlos |
Abstract
The dynamic stall phenomenon is present in many engineering problems and its prediction represents a great modeling challenge. Working airfoils in the dynamic stall condition can lead to serious aeroelastic vibration problems or loss of aerodynamic efficiency. The various physical events that result from airfoils dynamic stall imply in difficulties in the preparation of a mathematical model using the general theory of flows of fluid mechanics. The usual alternative for dynamic stall analysis and modeling is the direct observation of phenomena through experiments. The objective of this research proposal is the survey of the unsteady aerodynamic loading of an airfoil in pitching and translational motions during the dynamic stall regime. The collected load signals will also serve to adjust semi-empirical models based on the Beddoes-Leishman and ONERA methods. The aerodynamic force measurement device is composed of a rigid airfoil mounted in a mechanic system prepared to perform prescribed pitch movements and translations transverse to the flow of a blowing wind tunnel. Force and torque sensors and accelerometers are used to capture the total and inertial forces acting upon the airfoil. The movements of the airfoil will be guaranteed by electric motors and linear guides for the translations. Dynamic stall experiments and studies are few in Brazil, but the field has been of great worldwide interest. The proposition of both pitching and translational movements for the dynamic stall problem also does not yet present many results in the technical literature, therefore, there is a potential in this proposal for relevant contributions for the scientific community. (AU)
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