CALCULATION OF INLET FLOWS APPLIED TO DUCTED PROPELLERS

This investigation concerns inlet flow calculations applied to ducted propellers. The analysis is classified as that of an inlet flow since the ducted propeller wake is assumed to be at a constant diameter. A closed distribution of ring vortices is used to describe the duct and wake. By forming a closed distribution, the velocity can be equated directly to the vorticity. With this representation, a singular integral equation of the first kind is formulated for the vorticity in terms of the streamline enclosing the duct and wake. Several techniques incorporated in the numerical solution of this integral equation are presented. This analysis provides a needed solution for ducted propellers operating at low speeds and statically, as well as at high speeds. Experimental results for the velocity distribution are shown to agree well with this analysis. In additon, excellent agreement is obtained using this method for the classical flow around a sphere.

• Corporate Authors:

  American Institute of Aeronautics and Astronautics

  1290 Avenue of the Americas
  New York, NY  United States  10019
• Authors:
  • Weetman, R J
  • Cromack, D E
• Publication Date: 1973-10

Media Info

• Features: References;
• Pagination: p. 153-160
• Serial:
  • Journal of Hydronautics
  • Volume: 7
  • Issue Number: 4
  • Publisher: American Institute of Aeronautics and Astronautics

Subject/Index Terms

• TRT Terms: Ducted propellers; Shrouded propellers; Vortices; Wakes
• Old TRIS Terms: Vortex theory; Wake analysis
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00050019
• Record Type: Publication
• Source Agency: American Institute of Aeronautics and Astronautics
• Contract Numbers: N00014-68-A-0146, UR 109-01-03
• Files: TRIS
• Created Date: Nov 14 1973 12:00AM