 simpl shear flow flat plate incompress fluid small viscos simpl shear flow flat plate incompress fluid small viscos studi high-speed viscou flow two-dimension bodi consid curv shock wave emit nose lead edg bodi consequ exist inviscid rotat flow region shock wave boundari layer situat aris instanc studi hyperson viscou flow flat plate situat prandtl's classic boundari-layer problem prandtl's origin problem inviscid free stream boundari layer irrot hyperson boundari-layer problem inviscid free stream consid rotat effect vortic discuss ferri libbi paper simpl shear flow flat plate fluid small viscos investig problem treat boundari-layer approxim novel featur free stream constant vortic discuss restrict two-dimension incompress steadi flow 