ROLE OF SUCTION AND PRESSUREGRADIENTIN THE TRANSITION PROCCES OF BOUNDARY LAYER

In the paper secondary instability theory is used to analyse the effect of suctionsand pressure gradients on the charact eristics of spatially growing 3-D subharmonic distur-baces in b oundary layer flow. The end res ults indicate that suctions shows an apparentlaminar flow control on the boundary layer flows,and unfavorable pressure gradients haveastrong destability effects.