Test of a Dual-Rotation Axial Flow Fan
Abstract
Device built and tested was composed of two oppositely rotating 24-blade rotors. In preceding experiments, torque output of each motor was calibrated with Prony brake against wattmeter and voltmeter readings. Fan was tested with various combinations of front and rear blade angles and with two combinations of front and rear solidities. Pressure, torque coefficients, and efficiency were determined and presented as functions of quantity coefficient. Twice the pressure rise was obtained from dual-rotation fan as compared with previously tested single-stage fan without contravenes.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1942
- Accession Number
- ADA800572
Entities
People
- E. B. Bell
- Lucas J. Dekoster
Organizations
- National Advisory Committee for Aeronautics