Ly lo My 
NOTATION 
Velocity of sound in medium outside turbulent region 
Drag coefficient 
Instantaneous applied force or acoustic dipole strength per 
unit volume at point 7 in the turbulent region 
F.=F,G, t-r/c) =f 
f; iho (7, t-1r/c) 
Perpendicular distance from point to plane 
i 
Acoustic intensity in the 2, coordinate direction at point 
Acoustic intensity in the r, 9, and ¢ directions at point z 
Mass rate density of sources 
Typical linear dimension of the flow 
Mach number based on c and the convection velocity of the 
forces or the stresses 
Vector Mach number based on ¢ and the convection velocity of the 
forces or the stresses 
ith component of the vector Mach number 
M, = U/c, typical Mach number of the flow 
Sound power radiated by the turbulent region 
Instantaneous sound pressure at point & 
Mean-square sound pressure at point 7 
Reynolds number 
r = |z — y|, spherical polar coordinate centered at point 7 
7, = &; — y,, ith component of 7 
THe-y 
Correlation area 
Element of area at 7 
Instantaneous applied stress or acoustic quadrupole strength 
per unit volume at point 7 in the turbulent region 
T;, = T;; (¥, t-1/c) = tii 
hang BS OF (y, t—r/c) 
Time 
Typical velocity in the flow 
