Aerodynamic Testing of an Airborne Lightweight High-Efficiency Radial Fan

摘要

The results of the aerodynamic testing of a 66-inch diameter rotating-diffuser centrifugal fan for internal flow airborne applications are presented. To accommodate the testing of this unit, a testing facility had to be designed and built. Because of the availability of a test pad and high-power variable frequency electric motor equipment, the facility was located on the grounds of the Aerodynamics Laboratory of the U. S. Navy David Taylor Model Basin. The test stand and its calibration are described, and the results are presented. Results of the tests indicate a peak total pressure efficiency of 85 percent. This correlates with model fan information, including an experimentally determined scale effect. The RD fan is thus found to be an efficient, robust, stable air mover for air cushion vehicles and for other lightweight airborne applications. A limited noise survey investigation was made. It indicated low noise levels for the RD fan. (Author)