Flexnozzle steering of a fluid jet

The principle of flexnozzle steering is described and the results of a theoretical and experimental investigation of the method are given. Flexnozzle steering is accomplished by small movement of one part of a nozzle relative to the other part. The case presented here involves the movement of one side of a sharp-edged two-dimensional nozzle in a direction parallel to the nozzle centerline. Measurements of the resulting deflection angle and flow changes with area and coefficient of discharge are compared with the theory. Of the many possible applications of the technique, a new diverter valve which has been successfully used in mining ventilation is described briefly.