Return to articleThis schematic shows a drawing of the pulsejet and a typical ejector arranged as they were for the experiment. Both are mounted on a fixed test stand, in axial alignment, with a preset spacing between them. The pulsejet and a portion of the ejector are encased within a large, sealed acrylic box. Flow into the box is metered from a laboratory supply line. The exhaust portion of the ejector protrudes from the rear of the box, providing the only escape for air. This arrangement allows for the measurement of flow through the pulsejet and ejector. Immediately behind the ejector is a large suspended thrust plate. Immediately behind the thrust plate is a fixed load cell. This apparatus allows the measurement of total thrust. The thrust of the pulsejet alone, a measurement of which is necessary for the calculation of thrust augmentation, is obtained via a correlation with the mean combustion chamber pressure as measured with the average of two transducers.
Last updated: June 25, 2003
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