 experiment studi turbulen coundari layer shock tube wall experiment studi turbulen coundari layer shock tube wall interferometr measur densiti profil unsteadi turbul boundari layer flat wall shock tube investig includ subson superson flow mach number 0 50 1 77 pressur gradient heat transfer cold wall veloc profil averag skin-friction coeffici calcul effect veloc profil surfac rough flow length examin 