Experimental Investigation of Flow Conditions in the Vicinity of an NACA D sub S-type Cowling

摘要

Data are presented of the flow conditions in the vicinity of an NACA D sub S-type cowling. Tests were made of a 1/2 scale-nacelle model at inlet-velocity ratios ranging from 0.23 to 1.02 and angles of attack from 6 deg to 10 deg. The velocity and direction of flow in the vertical plane of symmetry of the cowling were determined from orifices and tufts installed on a board aligned with the flow. Diagrams showing velocity ratio contours and lines of constant flow angles are given.