Abstract
The present study quantifies the dynamics of actuation for the temporally forced, round gas jet injected transversely into a crossflow, and incorporates these dynamics in developing a methodology for open loop jet control. A linear model for the dynamics of the forced jet actuation is used to develop a dynamic compensator for the actuator. When the compensator is applied, it allows the jet to be forced in a manner which results in a more precisely prescribed, temporally varying exit velocity whose RMS amplitude of perturbation can be made independent of the forcing frequency. Use of the compensator allows for straightforward comparisons among different conditions for jet excitation. Clear identification can be made of specific excitation frequencies and characteristic temporal pulse widths which optimize transverse jet penetration and spread through the formation of distinct, deeply-penetrating vortex structures. Further details on this work may be found in M’Closkey et al. (2002).
Research on controlled transverse jets has been supported by the Energy Innovations Small Grants Program of the California Energy Commission under grant 51240A/99-01-56, by NASA Dryden Flight Research Center under Grant NCC 2-374, by NSERC Grant RGPIN217169, by NSF grant ECS-9985046, and by the University of California Energy Institute.
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© 2003 Springer-Verlag Wien
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M’Closkey, R.T., King, J., Cortelezzi, L., Karagozian, A.R. (2003). Active Control of Jets in Crossflow. In: Karagozian, A.R., Cortelezzi, L., Soldati, A. (eds) Manipulation and Control of Jets in Crossflow. International Centre for Mechanical Sciences, vol 439. Springer, Vienna. https://doi.org/10.1007/978-3-7091-2792-6_19
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DOI: https://doi.org/10.1007/978-3-7091-2792-6_19
Publisher Name: Springer, Vienna
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