CAJ | 학술논문

基于Odov和Corke提出的电场力模型,将等离子体作用力耦合到流动控制方程中,理论分析了等离子体对附面层流动的作用机理和效果,并通过对平板附面层流动的数值模拟验证了理论分析结果.研究表明,等离子体增加了其作用区内壁面附近的压力,绝缘壁面上的压力最大,沿壁面外法线压力梯度为负值;同时等离子体增大附面层内的速度,并诱导出沿壁面内法线方向的流动以及沿流向的顺压力梯度,这将有利于附面层流动分离的控制.随着来流速度的增加,等离子体的作用效果有所减弱,通过提高电极电压来提高电场强度,可以有效的提高其作用效果.
기우Odov화Corke제출적전장력모형,장등리자체작용력우합도류동공제방정중,이론분석료등리자체대부면층류동적작용궤리화효과,병통과대평판부면층류동적수치모의험증료이론분석결과.연구표명,등리자체증가료기작용구내벽면부근적압력,절연벽면상적압력최대,연벽면외법선압력제도위부치;동시등리자체증대부면층내적속도,병유도출연벽면내법선방향적류동이급연류향적순압력제도,저장유리우부면층류동분리적공제.수착래류속도적증가,등리자체적작용효과유소감약,통과제고전겁전압래제고전장강도,가이유효적제고기작용효과.
Based on the plasma body force model proposed by Orlov and Corke, this electic force was coupled into the flow governing equations as a source term. First, theoretical analyses were carried out for the two-dimensional boundary layer equation in order to reveal the mechanism of the plasma acting on the flow. Then validation of the above theoretical and analytical works was accomplished through boundary layer flow on a flat plate. The results show that the electric force increases the pressure within the boundary layer, with a maximum pressure close to the dielectric wall covering the buried electrode. The plasma also results in a significant variation of the flow velocity within the boundary layer, as well as induces a velocity component perpendicular to the wall and a favorable pressure gradient in the streamwise direction. This leads to an increased ability of the boundary layer to resist the adverse pressure gradient,which is beneficial to the alleviation of the flow separation. With the rise of the incoming flow velocity, the plasma effect decreases. So in order to obtain an effective flow control using plasma, the intensity of the electric field must be strengthened.