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Is Helmholtz resonance a problem for micro-jet actuators?
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Lockerby, Duncan A., Carpenter, P. W. and Davies, Christopher (2008) Is Helmholtz resonance a problem for micro-jet actuators? In: IUTAM Symposium on Flow Control and MEMS, Royal Geographical Society, London, England, Sep 19-22, 2006. Published in: IUTAM Bookseries, Vol.7 (Part 2). pp. 95-101. ISBN 978-1-4020-6857-7. doi:10.1007/978-1-4020-6858-4_10 ISSN 1875-3507.
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Official URL: http://dx.doi.org/10.1007/978-1-4020-6858-4_10
Abstract
Numerical-simulation studies are undertaken to investigate how Helmholtz resonance affects the interaction of nominally inactive micro-jet actuators with a laminar boundary layer. Two sets of numerical simulations are carried out. The first set models the response of an actuator in ambient conditions to a small jump in its internal pressure. These results verify our theoretical criterion for Helmholtz resonance. In the second set of simulations, two-dimensional Tollmien-Schlichting waves, with frequency comparable with, but not particularly close to, the Helmholtz resonant frequency, are incident on a nominally inactive micro-jet actuator. The simulations show that under these circumstances the actuator acts as a strong source of 3D Tollmien-Schlichting waves. It is surmised that in the real-life aeronautical applications with turbulent boundary layers, broadband disturbances of the pressure field would cause nominally inactive actuators to act as strong disturbance sources. Should this be true, it would probably be disastrous for engineering applications of such massless microjet actuators for flow control.
| Item Type: | Conference Item (Paper) | ||||
|---|---|---|---|---|---|
| Subjects: | T Technology > TL Motor vehicles. Aeronautics. Astronautics T Technology > TJ Mechanical engineering and machinery T Technology > TA Engineering (General). Civil engineering (General) |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||
| Series Name: | IUTAM Bookseries | ||||
| Journal or Publication Title: | IUTAM Bookseries | ||||
| Publisher: | Springer Netherlands | ||||
| ISBN: | 978-1-4020-6857-7 | ||||
| ISSN: | 1875-3507 | ||||
| Editor: | Morrison, JF and Birch, DM and Lavoie, P | ||||
| Official Date: | 2008 | ||||
| Dates: |
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| Volume: | Vol.7 | ||||
| Number: | Part 2 | ||||
| Number of Pages: | 7 | ||||
| Page Range: | pp. 95-101 | ||||
| DOI: | 10.1007/978-1-4020-6858-4_10 | ||||
| Status: | Not Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Conference Paper Type: | Paper | ||||
| Title of Event: | IUTAM Symposium on Flow Control and MEMS | ||||
| Type of Event: | Other | ||||
| Location of Event: | Royal Geographical Society, London, England | ||||
| Date(s) of Event: | Sep 19-22, 2006 |
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