Turbo jet engine thrust reversers and devices for deflecting the jet exhaust are examined In this book. The present status of research and development of reversers and deflecting devices is described and domestic priorities in building reversers is underscored. The efficiency of thrust reversal in braking aircraft upon landing and in flight is Indicated, as well as efficiency In deflecting the jet exhaust downward to shorten the takeoff and landing distance. A clas¬sification is given and principles laid down for building reverser and deflecting devices and examples of the construction of a variety of devices are cited. The fundamentals of gas-dynamic calculation of reverser and deflection devices are given. The method of calculation Is Illustrated by an example of the development of a reverser design from data of experimental research.nMethods of research and experimental facilities for testing models of reverser and deflecting devices are examined. The results of studies made by the authors on models of these devices using facilities equipped with force-measurement Instruments are set forth. In the Investigations gas dynamic measurements were also made with the aim of studying the physical flow pattern. Systematized and generalized data rooted In experimental in¬vestigations of models and full-scale reversers is recommended for use in calculations:full pressure recovery coefficients In de¬flecting devices of reversers and information on the effect on the reverse coefficient of by-passing part of the exhaust gases through the nozzle In the straight-flow direction. The results of measuring the exit angle of the flow from deflecting screens and connecting pipes of the reversers and the results of research on the diffusion of the reverse stream into the external flow bear scientific Interest as well as practical worth.
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