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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2015, Vol. 36 ›› Issue (6): 1762-1774.doi: 10.7527/S1000-6893.2014.0297

• Fluid Mechanics and Flight Mechanics • Previous Articles     Next Articles

Analytical model and repetitive working characteristics of plasma synthetic jet

ZONG Haohua, WU Yun, SONG Huimin, LI Yinghong, ZHANG Zhibo   

  1. College of Aeronautics and Astronautics Engineering, Airforce Engineering University, Xi'an 710038, China
  • Received:2014-07-16 Revised:2014-10-08 Online:2015-06-15 Published:2014-11-15
  • Supported by:

    National Natural Science Foundation of China (51336011, 51207169, 51407197)

Abstract:

Plasma synthetic jet (PSJ) actuator has a broad application prospect in supersonic flow control due to its high actuation intensity and rapid response. Based on theories of heat transfer and gas dynamics, an analytical model of the whole working process of PSJ is established. This model takes the inertia of throat gas, heat transfer through the cavity and the refresh stage of actuator into consideration, and can predict the peak jet velocity occurrence time, refresh stage and the oscillation stage. Based on this model, the repetitive working process and characteristics of actuator with different energy deposition, actuation frequencies and orifice diameters, are researched. In the repetitive working process of actuator, there exist two typical working stages, transition stage and steady stage. Both the cavity temperature and peak jet velocity rise at the transition stage while vary periodically at the steady stage. With the energy deposition and actuation frequency increasing, the cavity wall temperature, as well as the peak jet velocity and time-averaged thrust, goes up. Limited by the safety working temperature of cavity material, a safe operation area (SOA) of actuator exists. The area of SOA is proportional to the jet orifice diameter. As the orifice diameter augments, both the peak jet velocity and jet duration time at the steady stage decrease.

Key words: plasma, synthetic jet, actuator, analytical model, flow control

CLC Number: