RECIRCULATION CHARACTERISTICS OF A SMALL-SCALE VTOL LIFT ENGINE POD

摘要

Reported herein are exhaust gas ingestion and recirculating flow field characteristics of a small-scale VTOL lift engine pod containing two simulated engines. Results are presented for tests de¬signed to investigate transient development of the recirculating flow field, steady state ingestion and recirculating flow field characteristics, and dynamic simulation of takeoff and landing. The steady state test results include effect of nozzle height and spacing, effect of inlet and exhaust flow conditions, and effect of wind speed and direction.