Pulsed Actuation Control of Flow Separation on a ROBIN Rotorcraft Fuselage
| Autor: | Svyatoslav Yorish, Thomas Crittenden, Ari Glezer, George T. K. Woo |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
020301 aerospace & aeronautics
Engineering business.industry Acoustics Aerospace Engineering 02 engineering and technology Flight control surfaces 01 natural sciences Load cell 010305 fluids & plasmas Computer Science::Robotics Physics::Fluid Dynamics Aerodynamic force Adverse pressure gradient Flow separation 0203 mechanical engineering Particle image velocimetry Fuselage 0103 physical sciences Airframe Aerospace engineering business |
| Zdroj: | AIAA Journal. 54:3274-3289 |
| ISSN: | 1533-385X 0001-1452 |
| DOI: | 10.2514/1.j054008 |
| Popis: | Separation control of the three-dimensional flow over the aft segment of a NASA Rotor-Body-Interaction (ROBIN) rotorcraft fuselage is investigated in wind-tunnel experiments using arrays of miniature combustion-based actuators. Successive pulsed actuation is effected by momentary jets each having a characteristic time scale O[1 ms] that is an order of magnitude shorter than the convective time scale of the flow. The actuators are placed upstream of the transition ramp between the ROBIN’s fuselage and the tail boom. The jet-induced interactions with the massively separated crossflow over the ramp and their effects on the global aerodynamic forces and moments are investigated using high-resolution particle image velocimetry that is acquired phase-locked to the actuation waveform in conjunction with simultaneous force and moment measurements using an onboard load cell. The present investigations show that symmetric actuation about the model’s centerline can significantly mitigate separation, lead to a reduc... |
| Databáze: | OpenAIRE |
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