Perturbations in the wall region using flush mounted piezoceramic actuators

Autor:	Woo Pyung Jeon, R. F. Blackwelder
Rok vydání:	2000
Předmět:	Fluid Flow and Transfer Processes Materials science Turbulence Acoustics Computational Mechanics General Physics and Astronomy Perturbation (astronomy) Computer Science::Robotics Physics::Fluid Dynamics Amplitude Mechanics of Materials Spatial extent Actuator Voltage
Zdroj:	Experiments in Fluids. 28:485-496
ISSN:	1432-1114 0723-4864
Popis:	The use of triangular shaped piezoceramic actuators in the near-wall region of turbulent shear flows is described. These actuators are very thin so that they can be flush mounted on the wall which greatly simplifies their application. The piezoceramic material was driven by an oscillating voltage that produced a mechanical deformation of the actuator. The magnitude of the deformation, and thus the amplitude of the disturbance, depended upon the voltage and geometry of the actuator. The forcing frequency was sufficiently high that the temporal aspect of the disturbance was rapidly dissipated. Measurements of the streamwise velocity component document the spatial extent of the perturbation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::45aeac07a21cf31742e2f93bc795d3d3 https://doi.org/10.1007/s003480050410 Zobrazit plný text záznamu Full text from SpringerLink