Numerical Simulation Of Flow Control And Anti-icing Using NSDBD

As a new concept of active flow control technology,plasma flow control has the advantages of small size,low weight,quick response,wide-band control performance,etc,where a local micro-flow disturbances can be used to control the whole flow field characteristics.Plasma flow control has drawn great attention in aeronautics community in the world.Nanosecond pulsed dielectric barrier discharge(NSDBD)is a new type of plasma flow control technology in recent years,which can generate flow disturbance through rapid discharge heating in local flow,thus low speed as well as high speed boundary layer separation can be controlled effectively.Meanwhile,considering the effects of the high temperature and high pressure NSDBD generated,we apply it in the field of anti-icing on airfoil.In this paper,the main work is divided into two parts.The first part of work is the numerical research of separation flow control using NSDBD.Using numerical simulation method coupling of the One-zone Inhomogeneous Phenomenological Plasma(OZIPP)model of NSDBD and governing equation of flow,we obtained the compression-expansion wave structures,which is in consistent with the experimental results.Furthermore,we simulated airfoil separation control effect in large angle of attack of NSDBD in different Reynolds number,explored its mechanism in controlling the airfoil flow separation.Meanwhile,through varying the peak voltage and pulse repetition rate,we studied the effects of parameters on the separation-control efficiency.The corresponding relation of separation-control efficiency and NSDBD excitation parameters is given under different Reynolds number.The second part of the work is the numerical research of anti-icing using NSDBD.Using the unsteady algorithm,we simulated rime ice accretion of two-dimensional airfoil on the condition of typical features,and analyzed the icing effect on airfoil aerodynamic characteristics.Coupling of the model NSDBD,the effect of NSDBD in anti-ice of airfoil is studied,the mechanism includes three aspects mainly:(a)the effect of compression-expansion wave;(b)the effect of high temperature near wall;(c)effect of high temperature on the wall.The effects of NSDBD’s parameters on the anti-icing efficiency is also discussed.