Wake-Fin Tailoring for Projectile Steering
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University of Toledo / OhioLINK
2011
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=toledo1302200662 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-toledo13022006622021-08-03T06:07:48Z Wake-Fin Tailoring for Projectile Steering Yang, Chuanbo Aerospace Engineering Fluid Dynamics Mechanical Engineering flow control aerodynamics wake-fin tailoring low angle of attack slender projectile <p>The overall goal of this dissertation is to investigate an active flow control concept, called wake-fin tailoring (WaFT), for improving the steering performance and attitude control of projectiles. The concept is based on the use of mechanical flow control actuators located at a position well upstream of the projectile’s tail. With an asymmetric deployment of the actuators, the system induces an asymmetric wake-flow that interacts with the tail fins to generate aerodynamic control forces and moments. The system can be used to provide in-flight adjustment capability, reduce dispersion and increase endgame maneuver footprint of the projectiles.</p><p>The investigation results in the following:</p><p>1. Proof-of-concept experiments and computational simulations were conducted to investigate the feasibility of the proposed method. Low-speed wind tunnel experiments were performed on a representative surrogate tank munitions (STM) model. Effects of actuator parameters such as shape, locations (axis and azimuth), and actuator size were examined. Based on the results, the best control configuration was identified.</p><p>2. Steady CFD modelings of the projectile were carried out at subsonic and supersonic speeds to investigate the flow control mechanism and determine the control performance at operational flight speeds. </p><p>3. Unsteady CFD simulations were performed to evaluate the performance of WaFT during dynamic events including spinning motion and dynamic deployment of actuators.</p><p>Results from wind tunnel experiments and CFD simulations demonstrate effective generations of control forces and moments by the WaFT system. The overall control authority is derived from two effects. First, a deployed actuator modifies the local surface pressure resulting in a local force. Second, the wake of the actuator interacts with the tail-fins downstream to change the pressure distributions on the fins. As a result, the control authority is enhanced compared to either effect alone. Additionally, a wide control bandwidth and a small drag penalty are expected due to the small size of the actuator.</p> 2011-06-10 English text University of Toledo / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=toledo1302200662 http://rave.ohiolink.edu/etdc/view?acc_num=toledo1302200662 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Aerospace Engineering Fluid Dynamics Mechanical Engineering flow control aerodynamics wake-fin tailoring low angle of attack slender projectile |
| spellingShingle |
Aerospace Engineering Fluid Dynamics Mechanical Engineering flow control aerodynamics wake-fin tailoring low angle of attack slender projectile Yang, Chuanbo Wake-Fin Tailoring for Projectile Steering |
| author |
Yang, Chuanbo |
| author_facet |
Yang, Chuanbo |
| author_sort |
Yang, Chuanbo |
| title |
Wake-Fin Tailoring for Projectile Steering |
| title_short |
Wake-Fin Tailoring for Projectile Steering |
| title_full |
Wake-Fin Tailoring for Projectile Steering |
| title_fullStr |
Wake-Fin Tailoring for Projectile Steering |
| title_full_unstemmed |
Wake-Fin Tailoring for Projectile Steering |
| title_sort |
wake-fin tailoring for projectile steering |
| publisher |
University of Toledo / OhioLINK |
| publishDate |
2011 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=toledo1302200662 |
| work_keys_str_mv |
AT yangchuanbo wakefintailoringforprojectilesteering |
| _version_ |
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