Study of Reverse-Flow Characteristics of a Tip Fan and an Ejector.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING
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An investigation was carried out in order to determine the reverse-flow characteristics of an ejector and a tip-turbine fan. The components tested a model TD-530 ejector and model TD-457 tip-turbine fan manufactured by Tech Development Corporation of Dayton, Ohio. A plenum chamber and air flow system were designed and constructed to permit variation of flow rates and back pressures, as well as fan and ejector driving pressures. Measurements of pressures and temperatures were taken in order to determine air mass flow rates of drive and inlet air as a function of back pressure. Fan speed for the tip-turbine fan was also monitored as a function of back pressure, and various ejector exit conditions were studied to determine their affect on basic ejector performance. The secondary air mass flow reates for both devices were found to be practically linear functions of back pressure, up to and including the reverse-flow regime. The results of these studies are presented in graphical form and discussed. Author
- Fluid Mechanics
- Jet and Gas Turbine Engines