Use of temperature-sensitive coatings for obtaining quantitative aerodynamic heat- transfer data

Abstract

aluminum and vary from a minimum of three blades to a maximum of six blades, one of T-g -, one of ^-, one of f-, and one of J-in. diam. All of the rotors have removable shrouds around them. The blades are of aerofoil shape. This, in combination with suitable hub shape, prevents the rotation of the vane in irrotational flow. The constructional details are similar to those used by Todd. The rotors are interchangeable and can be press-fitted to the spindle. The speed of the rotor was measured by means of a stroboflash. The speed of rotation of a very thin nylon tuft attached to a thin wire was measured in a vortex field and compared with the speeds obtained from the vorticity meter. Nearly identical values confirmed the accuracy of the instrument.