PERFORMANCE CHARACTERISTICS OF RING-CASCADE-TYPE THRUST REVERSERS

摘要

Model ring-cascade thrust reversers were tested in quiescent air to determine the effect of geometric design variables on performance and reversed-flow fields. The configurations consisted of a cascade of turning rings plus a mechanical deflector positioned aft of a 4-inch exhaust nozzle with a 7°external fairing. Reverse-thrust ratios up to 68 percent were obtained. The most important variables affecting per­formance were found to be deflector blockage, reverser working area, and ring spacing ratio. When the reversed-flow field was altered to obtain a two-lobed pattern by any of the several methods tested, the reverse-thrust ratio was reduced. The modulation characteristics of a typical shrouded ring-cascade reverser were found to be satisfactory.