Nuclear Rocket Propulsion |
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axial B.S. degree Beryllium oxide calculated carbide Cavity Reactors chemical rockets CONTROL ROD cooling core correlation critical engine equation experiments factor film boiling fissionable material flow oscillations flow rate flow system fluid fuel elements fuel-element gaseous geometries graphite hafnium hafnium carbide heat flux heat input heat transfer heat-transfer coefficient heat-transfer data heated tube hydrogen flow inlet plenum investigations Lewis Research Center maximum melting metal moderator NASA NASA Lewis Research NASA TN neutron flux nozzle nuclear rocket nuclear-rocket reactor nucleonic Nusselt obtained outlet parameter perature percent pound per second pounds per square PRECOOL pres pressure drop problem propellant Propulsion pseudo-two-phase pump radial ratio reference 11 reflector refractory region Reynolds number sensor shown in figure solid-core specific impulse startup steady-state subcooled Tantalum carbide TEMP test section test-section thermal neutrons tion transient tungsten tungsten 184 ture two-phase flow typical uranium vapor velocity vortex
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Page 56 - Control problem areas and operational limits. One of the most important operational limits the control must observe is the rate of neutron multiplication; this rate should be slow enough that the control can always move quickly enough to avoid a runaway multiplication. This control function is most stringently demanded in the startup maneuver. Reference 1 presents a good exposition of some of the problems of reactor control for the maneuver of raising the neutron flux from source level to a level...
Page 12 - DS, and PEARS, CD : Southern Research Inst, Nov. 1960. 18. Investigation of Graphite Bodies. TR 59-706, WADC. Apr. 1960, p. 58. 19. MACMILLAN, DONALD P. : High Temperature Materials for Rocket Reactors. Nucleonics, vol. 19, no. 4, Apr. 1961. 20. MAY, CHARLES E., and HOEKSTRA, PAUL D. : Stability of Refractory Compounds in Hydrogen Between 4500° and 5000° F, and Their Compatibility with Tungsten.
Page 53 - DENGLER, CE, and ADDOMS, JN : Heat Transfer Mechanism for Vaporization of Water in a Vertical Tube.
Page 53 - Experimental Heat Transfer and Pressure Drop of Liquid Hydrogen Flowing Through a Heated Tube...
Page 32 - The 90° F limit attached to this region is used because it is at about this temperature that the specific heat of hydrogen attains its maximum value; this value corresponds to the temperature above which the transport and specific-heat properties of hydrogen appear to be unaffected by the critical temperature condition (see ref. 11). Reference 12 gives a good discussion of boiling and near-critical heat transfer. Local heat-transfer data are presented in reference 13 for bulk boiling of water in...
Page 12 - Study of a Compressible, Viscous Vortex. Tech. Rep. 32-290, Jet Prop. Lab., CIT, June 1962. 37. EINSTEIN, THOMAS H. : Radiant Heat Transfer to Absorbing Gases Enclosed in a Circular Pipe with Conduction, Gas Flow, and Internal Heat Generation. (NASA TR tobepubl.) 38. LANZO, CHESTER D., and RAGSDALE, ROBERT G. : Experimental Determination of Spectral and Total Transmissivities of Clouds of Small Particles.
Page 25 - ... supersonic speeds, and conceived and applied new research techniques and equipment including novel supersonic wind-tunnel nozzles, methods for visualizing airflows at supersonic speeds, and the flight-test technique of firing gun-launched models upstream through supersonic wind tunnels. He is a Fellow of the Institute of the Aerospace Sciences, a Senior Member of the American Rocket Society, and a member of Sigma Xi. INTRODUCTION Many space science investigations could be considered under the...
Page 12 - ... Development on Advanced Graphite Materials. TN 61-18, WADD, Apr. 1961. 14. GREEN, WALTER V. : Short-Time Creep-Rupture Behavior of Tungsten at 2250* to 2800° C. Trans. AIME, vol. 215, no. 6, Dec. 1959, pp. 1057-1060. 15. Materials Symposium, Sept. 13-15, 1961 : ASD Tech. Rep. 61-322, p. 71. 16. BARTH, VD : Physical and Mechanical Properties of Tungsten and Tungsten-Base Alloys. DMIC Rep. 127, Defense Metals Info. Center, Battelle Memorial Inst, Mar. 15, 1960. 17. NEEL, DS, and PEARS, CD : Southern...
Page 54 - Louisville (Ky.), vol. 52, no. 18, 1956, p. 69. 11. HENDRICKS, RC, GRAHAM, RW, Hsu, YY, and MEDEIROS, AA : Correlation of Hydrogen Heat Transfer in Boiling and Supercritical Pressure States.
Page 12 - RAGSDALE, ROBERT G. : Applicability of Mixing Length Theory to a Turbulent Vortex System. NASA TN D-1051, 1961. 36. KENDALL, JAMES M., JR. : Experimental Study of a Compressible, Viscous Vortex.