CHARACTERISTICS OF FLUID FLOW THROUGH ORIFICES IN ROTATING DISKS.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING
Pagination or Media Count:
Rotating orifices were investigated recently as a means of cooling the window of a reentry vehicle. Besides intercepting thermal radiation, the rotating disk containing the orifices was believed to have reduced the flow of hot gases through the orifices. The study demonstrated with both air and water and with various disks that the flow rate can be reduced by increasing the orifice tangential speed. The results are presented graphically with the discharge coefficient C shown as a function of a non-dimensional velocity parameter S. At zero rotation S O the discharge coefficient with air has values of 0.60 to 0.65, whereas at higher S values the discharge coefficient decreases to a range of 0.08 to 0.18. In the water tests values of S of 8.8 to 9.3 were obtained with corresponding values of C ranging between 0.04 and 0.18. Author
- Fluid Mechanics
- Unmanned Spacecraft