^xp-x Surface area between x = x and x = xg 



s Arc length along a meridian 



s. Arc length of model along a meridian 



T Forebody slenderness parameter T = (L E /D)/C P 



U Potential flow velocity on the model 



U Speed of model or prototype 



u. Laminar boundary layer velocity at trip height k 



x Axial distance from model forepoint 



xn Length of laminar flow on model forebody 



y Forebody radius 



a Tangent angle of model profile 



A C D Stimulator drag coefficient, A D T /( 1 /2 p u k 2 2 vr y k k) 



A C T Stimulator drag coefficient, A D T /( 1 /2 p U Q 2 S) 



AD T Stimulator drag 



Ap Pressure change on model from potential flow 



5* Boundary layer displacement thickness 



77 Nondimensional forebody radius 



6 Boundary layer momentum thickness 



d XQ Boundary layer momentum thickness at x = xg 



^xp -x # at x = Xg from turbulent flow originating at x - x 



6 2 dU 



X Pressure gradient parameter, — — 



v ds 



v Kinematic viscosity of fluid 



£ Nondimensional axial distance from forward point 



p Fluid density 



Subscripts 



k Location of stimulator 



C Laminar flow 



o Location of virtual origin 



t Turbulent flow 



