INVESTIGATION OF THE PROCESS OF ENERGY TRANSFER FROM AN INTERMITTENT JET TO SECONDARY FLUID IN AN EJECTOR-TYPE THRUST AUGMENTER
Abstract
Experiments with ejector--type thrust augmenters using an intermittent jet show augmentation ratios as high as 2.4 with augmenter length-- to-diameter ratio of less than 2 and jet outlet to augmenter x-section area ratio of 7. This high performance as compared with a steady flow device of similar size, is explained by higher pressure ratios obtained with an isentropic wave process. Results contributed to the practical development of a propulsion engine, the Pulse Reactor, which uses a high performance valveless pulsejet to produce the intermittent jet. A converter to produce intermittent flow from a steady flow, such as provided by a turbojet, was built and shows potential. The major effort was directed towards instrumentation and techniques for gathering data to support the energy transfer analyses. A color-modified schlieren system with a high-speed motion picture camera provides visualization of interface movement and pressure waves generated in the augmenter.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 31, 1961
- Accession Number
- AD0265071
Entities
People
- Raymond M. Lockwood