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)
An Experimental Study of the Aerodynamic Resistance of Vehicles Moving Through Tubes
1969
43 pages
Report
Keine Angabe
Englisch
Road Transportation , Aerodynamics , Fluid Mechanics , Vehicles , Drag , Pipes , Model tests , Friction , Air , One-dimensional flow , Pressure , Tube vehicles