 mix theori interact dissip flow isentrop stream mix theori interact dissip flow isentrop stream simplifi theoret model paper treat gener class flow problem character interact viscou dissip flow surfac solid bodi wake outer isentrop stream extern flow plane steadi superson flow small angl plane surfac plane symmetri method extend curv surfac axial symmetr superson flow subson flow intern dissip flow regard quasi-on-dimension parallel surfac averag properli defin veloc temperatur nonuniform actual veloc distribut account relat temperatur veloc mix transport momentum outer stream dissip flow consid fundament physic process determin pressur rise support flow aid concept larg number flow problem basic boundari-layer shockwav interact wake flow blunt-base bodi base pressur problem flow separ overexpand superson nozzl separ wing bodi 