AERODYNAMIC STABILITY DERIVATIVES OF A SLENDER BODY TRAVELING IN A PERFORATED TUBE

The incompressible potential flow is determined for a slender body traveling off center in a perforated tube. From this, formulas are derived for the stability derivatives of a body having an arbitrary cross-sectional area distribution. These results may be compared with results previously derived for the stability derivatives of a slender body traveling in a tube with a closed wall. In the latter case the stability derivatives could become a large multiple of their free air values, and the more the body filled the tube the greater the multiple. When the wall is perforated, on the other hand, it is found to be always possible to design the perforations in such a way that the stability derivatives take on their free air values regardless of the size or shape of the body. Thus, it becomes possible to make the ratio of the body cross-sectional area to the tube cross-sectional area very close to unity without paying any aerodynamic penalty. (Author)

• Corporate Authors:

  Oceanics, Incorporated

  Plainview, NY  United States 
• Authors:
  • Goodman, T R
• Publication Date: 1968-10

Media Info

• Pagination: 33 p.

Subject/Index Terms

• TRT Terms: Aerodynamics; Intelligent transportation systems; Pneumatic conveyors; Tubing
• Old TRIS Terms: Advanced systems; Tube systems; Tube vehicles
• Subject Areas: Operations and Traffic Management; Railroads;

Filing Info

• Accession Number: 00039099
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: TR-68-48 Tech Rpt
• Contract Numbers: C-265-66
• Files: TRIS
• Created Date: Nov 24 1973 12:00AM