CAJ | 학술논문

针对非对称突扩通道的流动,建立了平面二维不可压稳态层流数学模型,采用守恒性能高的有限体积法对控制方程进行离散,并选用绝对稳定的混合格式,利用交错网格下的SIMPLE算法进行流场数值计算,得到了回流区形态的变化规律.研究表明,非对称突扩通道流动受雷诺数和几何形状的影响.
침대비대칭돌확통도적류동,건립료평면이유불가압은태층류수학모형,채용수항성능고적유한체적법대공제방정진행리산,병선용절대은정적혼합격식,이용교착망격하적SIMPLE산법진행류장수치계산,득도료회류구형태적변화규률.연구표명,비대칭돌확통도류동수뢰낙수화궤하형상적영향.
Two-dimensional steady laminar flow model is setup to simulate the flow in an unsymmetrical sudden expansion channel.The finite volume method,which is a high performance conservation method,is used to complete discretion of the control equations,and absolute stability of mixed format is selected.The SIMPLE algorithm based on staggered grid is used for flow field numerical computation,and formation variation law of back-flow area is found.Research shows that the flow in an unsymmetrical sudden expansion channel is influenced by Reynolds number and geometrical shape.