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Technique for Enhanced Flow Control Efficiency Through Thermal Actuation

Hirsch, Damian and Shmilovich, Arvin and Whalen, Edward and Gharib, Morteza (2018) Technique for Enhanced Flow Control Efficiency Through Thermal Actuation. AIAA Journal, 56 (9). pp. 3399-3413. ISSN 0001-1452.

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Thermal active flow control has been developed to enhance the efficiency of active flow control systems. The actuation concept is derived from gas-dynamics principles, and it is based on thermal control of the air supply. It is shown that higher air supply temperatures result in reduced mass flow rate with no degradation in active flow control performance. A computational method has been used to systematically investigate the hot air supply approach for isolated blowing actuators and fluidic oscillators. Subsequently, the thermal control concept has been computationally evaluated for airplane applications. These include enhanced control authority of a vertical tail and an airplane high-lift system, confirming the trends observed from the gas-dynamics analysis with regard to reduced actuation input as a function of supply temperature. Further confirmation of the thermal actuation concept was experimentally obtained for a bench-top actuator and a vertical-tail model in a wind-tunnel setting. The paper introduces potential approaches for system integration associated with heated supply, while highlighting the benefit of using available high-temperature sources for active flow control.

Item Type:Article
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Gharib, Morteza0000-0002-2204-9302
Additional Information:© 2018 by The Boeing Company. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. Presented as Paper 2017-3040 at the 35th AIAA Applied Aerodynamics Conference, Denver, CO, 5–9 June 2017; received 14 November 2017; revision received 6 April 2018; accepted for publication 21 April 2018; published online 10 August 2018.
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Other Numbering System NameOther Numbering System ID
AIAA Paper2017-3040
Issue or Number:9
Record Number:CaltechAUTHORS:20180912-144753896
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Official Citation:Technique for Enhanced Flow Control Efficiency Through Thermal Actuation. Damian Hirsch, Arvin Shmilovich, Edward Whalen, and Morteza Gharib. AIAA Journal 2018 56:9, 3399-3413
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:89587
Deposited By: Tony Diaz
Deposited On:12 Sep 2018 22:21
Last Modified:03 Oct 2019 20:17

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