STUDY ON FLOW FEATURES OF SYNTHETIC JET
This paper deals primarily with the combined experimental and theoretical characterization of flowfield of a synthetic jet actuator with slot orifice. The synthetic jet actuator is driven by piezoelectric diaphragm with square waves. The cavity is sealed all around, with only a two-dimensional slot,0.5mm wide and 10mm long on one side. The experimental work utilizing Particle Image Velocimetry (PIV) and hot-wire anemometer presented includes measurements and analysis of three-dimensional flowfield produced by a synthetic jet actuator.It is found that, at the slot exit, pairs of vortexes are generated, broken down and merged together periodically,forming the continue jet at one normal distance near the slot nozzle. And during the development, the synthetic jet spreads rapidly in the short axis direction. While in the long axis direction, the synthetic jet contracts firstly and then spreads slowly.Additional to the experimental work, a theoretical model for the oscillating flowfield generated inside the actuator is presented. This simulation takes into account the cavity, the orifice and the outside zone. A modeled boundary condition and dynamic mesh model is developed for the actuator membrane. The boundary conditions for this model are set to be a sinusoidally moving rigid body. Three different velocity distributions along the orifice are examined. Finally,preliminary results are presented and compared with experimental results and qualitatively agreed with the experimental data.
Tan Xiao-Ming Zhang Jing-Zhou
College of Energy and Power Engineering Nanjing University of Aeronautics and Astronautics, Nanjing, 210016
国际会议
昆明
英文
713-718
2006-09-18（万方平台首次上网日期，不代表论文的发表时间）