KURGAN_LT code - Reference Guide

KURGAN_LT is a computational tool for the numerical prediction of noise generated by an open, isolated rotor. The Farassat formulation 1A is adopted for the evaluation of the thicknessa and loading noise in the subsonic regime; furthermore, a set of additional routines allows the treatment of the same problem for supersonic tip speed rotors using Farassat formulation 1 and the acoustic surface integration scheme. The two different formulations are linked within a single procedure, which may be used for rotor blades at different flight attitudes. The numerical evaluation of the effect of the nonlinear source terms only refers to a hovering rotor blade, with a moderate tip speed, and is performed using a volume integration. The user has to provide the code with the blade geometry and aerodynamic load (linear terms) and th efluid velocity field around the body (nonlinear terms).