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Three notes on propulsion and braking of tubeflight vehicles

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.., TR AE 6707 (November 1967) ....... TUBEFLIGHT PROPULSION BY BLADELESS FANS TR AE 6802 (January 1968) POWER DEMANDS OF…
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FOREWORD The two reports and the note which are bound together here, "Tubef1ight Propulsion by B1adeless Fans,"…
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TR AE 6707 TUBEFLIGHT PROPULSION BY BLADELESS FANS by J. V. Faa This research was supported by the Office of High-Speed…
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SU~y This paper examines the suitability of bladeless fans as thrust generators for tubeflight vehicles) with particular…
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SYMBOLS A cross~sectional area At cross~sectional area of guideway All = ril l/,o"l..4I' B c flow velocity in…
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~ ~ ;::: ~th. 71: /'< ;::: 7T = j'J 6' = azimuthal flow angle /3,i (spin angle) spin angle that…
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TUBEFLIGHT PROPULSION BY BLADELESS FANS Introduction The "blade less fan" is a pressure e""changer [1] ~r…
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- 2 - the unique frame of reference in which they are both steady). In so doing, they acquire equal and opposite angular…
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TUBEFLIGHT PROPULSION BY BLADELESS FANS Introduction The "bladeless fan" is a pressure exchanger [1] ''…
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- 2 - the unique frame of reference in which they are both steady). In so doing, they acquire equal and opposite angular…
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TUBEFLIGHT PROPULSION BY BLADELESS FANS Introduction The "bladeless fan" is a pre.ssure exchanger [lJ ''r…
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- 2 - the unique frame of reference in which they are both steady). In so doing, they acquire equal and opposite angular…
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- 3 - mutual deflection of the two flows. For situations involving large density ratios or high tangential velocities or very…
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- 4 - of the shroud enclosing the interaction space are prescribed in this case, the enclosure being provided by the guideway…
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- 5 - taken into the vehicle through scoops, energized, .and discharged to form the primary jets. The remainder, of mass flow…
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- 6 - Other simplifying assumptions are also used in the present analysis. In the condition of matched internal propulsion…
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or r I + IT = - 7 - (2) In the deflection phase each of the two flows maintains a constant total pressure in the rotor-…
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- 8 - or U 'ol = [ ( ~):L ] YJ.. I i" B -r 1T - '-to p.J B (4) Finally, the axial momentum equation for…
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- 9 - , must be small enough to make it permissible to neglect the primary density changes that would be associated with an…
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- 10 - From Eq. 6, = (7) Eq. 7 permits the calculation of the power input factor Pb at any Mach number M_ from the…
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- 11 - where A~ is the overall rise of specific entropy in the internal ducting and in the gas generator, and Cpis an…
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- 12 - the undisturbed flow ahead of the vehicle and at a near station ~ behind it, respectively (Fig. 7). In the specified…
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- 13 - transfer flow. Since this air is diverted from the transfer passage, the rate at which energy must be added to the…
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- 14 - To be meaningful, a comparison of power demands of bladeless and con- ventional fans for matched internal propulsion…
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- 15 - the appropriate value of each design and operating parameter will in each case fallon the pertinent curve of the chart…
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