The Effects of Freestream Turbulence on the Characteristics of a Rudder

Abstract

The effects of freestream turbulence on the characteristics of a rudder with normal-wing-type section are investigated by wind tunnel experiments. Three models of different sizes of the rudder are used. Lift, drag and moment for three rudders are measured in the freestream of five different levels of turbulence artificially produced by turbulence lattices. The measurements are carried out in various wind speeds as well as various angles of attack of rudders. Large effect of turbulence on the forces of the rudder is demonstrated as the result of experiment.