AN EXPERIMENTAL STUDY OF THE AERODYNAMIC RESISTANCE OF VEHICLES MOVING THROUGH TUBES

The aerodynamic resistance of solid rocket propelled, tube-vehicle models was examined at speeds up to 400 ft/sec. During the traverse of a 250-foot-long, 2.89 in. I.D. stainless steel tube, model trajectory, tube air static pressure and tube air velocity data were recorded. At low speeds, a pipe friction theory was found to correlate both the drag coefficients inferred from model deceleration, and the air pressure drop across the models. At high speed, the models induced significant air motions in the tube which, when coupled with tube end reflections, precluded data reduction to coefficient form. Application of the one-dimensional, unsteady method of characteristics, modified to account for mass flow past the models, is shown to produce reasonable agreement between the measured and predicted values of the induced air velocity. (Author)

• 
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/927
• Corporate Authors:

  Ohio State University, Columbus

  Aeronautical and Astronautical Research Laboratory
  Columbus, OH  United States 
• Authors:
  • Gregorek, G M
• Publication Date: 1969-4

Media Info

• Pagination: 43 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: 00039165
• Record Type: Publication
• Source Agency: National Technical Information Service
• Contract Numbers: DOT-3-0298
• Files: NTL, TRIS
• Created Date: Nov 24 1973 12:00AM