Fig. 9From: Experimental study of bluntness effects on hypersonic boundary-layer transition over a slender cone using surface mounted pressure sensorsGroup velocity of second mode instability wave package based on bluntness of R = 0.1 mm, a Sensor NO. 1 → NO. 2, b Sensor NO. 2 → NO. 3, c Sensor NO. 3 → NO. 4, d Sensor NO. 4 → NO. 5, Reunit = 4E+ 6/mBack to article page