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Project tubeflight : phase 1, feasibility study : final report for the period Dec 10, 1965 - Sept 9, 1966 prepared for the…

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,r.; co· :p;. 14 ,-,,: a "0 Ql Ql p.. Cf.l ~ Q) r-I .-{ Ql p.. o ~ P-l ~ o / ' . .-( I o Q…
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V-I v SUMMARY OF RESULTS AND CONCLUSIONS (1) Substantial reductions of the power required for high-speecl I v~hicular…
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V-2 (2) ans as t rust generators The use of bladeless propellers or f h fat correct internal propulsion is teasible.…
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V-3 have been used to evaluate the inherent stability of a tubeflight vehicle. It has been determined that at high speeds,…

Propulsion of a vehicle in a tube

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TR AE 6404 PROPULSION OF A VEHICLE IN A TUBE by
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#8 , TR AE 6404 PROPULSION OF A VEHICLE IN A TUBE by Joseph V. Foa This study was supported by the U. S. Army Research…
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ERRliTA SHEE'r PAGE .. =sea LINE - TO -- 1ii 11 -pAll.. ;oAu 8 5 qu.antitative qualitative 11 eq,,(lO) d-…
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SUMMARY This study concerns the flow disturbances and energy transformations that a vehicle traveling in a tube produces in…
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SYMBOLS a speed of sound, fps A cross-sectional area of the tube, sq. ft. Av maximum cross-sectional area of the vehicle…
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TO stagnation temperature in vehicle-fixed frame of reference, oR TO* stagnation temperature in tube-fixed frame of…
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INTRODUCTION A vehicle may be propelled through a tube in an infinite variety of ways, but these may be grouped, for…
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F-2 The situation studied here is that of a straight, horizon- tal and infinitely long tube, within which a vehicle is…
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F-3 It is precisely with sllch motions and cycles that this study is concerned, and special attention is given to their…
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F-4 From the energy equation and neglecting changes of specific heats, there follows, after some manipulation, (2) or (2…
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01::' F-5 d(lfi'M2) Ir i'MZ. From the definitions of G and N Therefore, Finally, =. 'zL ~+ 1+~l1z…
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F-6 the Fanna flow equations. Adiabatic flows are of 'limited interest in relation to the problem at hand. The…
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F-7 depending on whether y falls within the range or outside of it. Finally, Eq. 6' shows that, if y falls within the…
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F-8 It is obvious, however, that. the actual program of heat exchange between the internal flow and the surrounding…
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F-9' A. more exact, but necessarily only nume·rical ,analys is of the same problem is carried out in Ref. 3, where Eqs.…
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F-10 The flow transformation ahead of the vehicle will, accord- . 0* . ing1y, be analyzed as a constant-T process for…
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F-ll and (9 ) Eq. 9 reveals the important (and potentially useful) fact . that the stagnation temperature of the internal…
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F-12 whence Finally, Eqs. 1, 6, 11, and the continuity equation yield ~ - ~-P(/-J)z. (1- '1) IJI (11) Therefore,…
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F-13 The stream force can be calculated as a function of y from the continuity equation in the form FN~::: constant which,…
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F-14 subsonic, Ml is determined by conditions further downstream, and the continuity equation gives h _ FoAlo . PoA - ;:…
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F-15 The calculated Mach number just ahead of the vehicle, Ml - .252, is the Mach number that would be maintained by a well…
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