Question

Circulation varies along the lifting line.

(a) False

(b) True

I got this question in an interview for job.

The doubt is from Prandtl’s Classical Lifting-Line Theory topic in division Flow over Airfoils over Finite Wing of Aerodynamics

Answer 1

Correct option is (b) True

To explain I would say: In lifting line theory, the lifting line along the span is a superimposition of many bound vortices with different lengths. This gives different strengths for each of the horseshoe vortex i.e. the circulation varies along the lifting line.