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Wednesday, August 5, 2020 | History

2 edition of Effects of impurities on the supersaturation of nitrogen in a hypersonic wind tunnel. found in the catalog.

Effects of impurities on the supersaturation of nitrogen in a hypersonic wind tunnel.

Paul David Arthur

Effects of impurities on the supersaturation of nitrogen in a hypersonic wind tunnel.

by Paul David Arthur

  • 86 Want to read
  • 38 Currently reading

Published in Pasadena .
Written in English

    Subjects:
  • Solutions, Supersaturated.,
  • Nitrogen.,
  • Aerodynamics, Hypersonic.,
  • Condensation.

  • Classifications
    LC ClassificationsQD548 .A77
    The Physical Object
    Paginationxii, 129 l.
    Number of Pages129
    ID Numbers
    Open LibraryOL4471249M
    LC Control Number79240158

    Dec 01,  · Gas exchange and bubble-induced supersaturation were measured in a wind-wave tank using total gas saturation meters. The water in the tank was subjected to bubbling using a large number of frits at a depth of m. A simple linear model of bubble-mediated gas exchange implies that this should force an equilibrium supersaturation of 3%.Cited by: 9. The influence of varying supersaturation on crystal size and shape distribution can be clearly observed by comparing ParticleView (a probe based real-time microscope) images for each experiment. Higher supersaturation results in the smallest crystals – since nucleation will be favored over growth.

    Buhler, Rolf Dietrich () Condensation of air components in hypersonic wind tunnels: theoretical calculations and comparison with experiment. Dissertation (Ph.D.), California Institute of Technology. Dec 02,  · The book contains the papers presented during the meeting that tackled a broad range of topics in the aspects of hypersonic flow. The subjects covered during the meeting include pressure measurements, interference effects, the use of wind tunnels in aircraft development testing, high temperature gas characteristics, boundary layer research Book Edition: 1.

    AN EXPERIMENTAL STUDY OF THE OXIDATION OF GRAPHITE IN HIGH-TEMPERATURE SUPERSONIC AND HYPERSONIC ENVIRONMENTS By Irvin M. Miller and Kenneth Sutton Langley Research Center SUMMARY An experimental study was made of the oxidation of graphite exposed to high- temperature supersonic and hypersonic test streams of air and air-nitrogen mixtures. Question: Consider Two Hypersonic Wind Tunnels With The Same Reservoir Temperature Of K In Air. (a) One Tunnel Has A Test Section Mach Number Of Calculate The Flow Velocity In The Test Section Using Quasi-one Dimensional Flow Analysis, (b) The Other Tunnel .


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Effects of impurities on the supersaturation of nitrogen in a hypersonic wind tunnel by Paul David Arthur Download PDF EPUB FB2

The supersaturation of the nitrogen was decreased by the addition of impurities, and only a fraction of a percent of carbon dioxide or water vapor was required to eliminate completely all supersaturation. Addition of argon and oxygen was found to be much less effective in decreasing the axendadeportiva.com by: 8.

An experimental investigation was conducted to determine the effects of additives on the supersaturation of commercial bottled nitrogen expanded in a hypersonic nozzle. In particular, enough oxygen was added to duplicate air proportions. A stainless steel two-dimensional source-flow nozzle of one-inch width was used to conduct the axendadeportiva.com by: 8.

The effect of oxygen and argon was small; the addition of 23 per cent oxygen reducing the super- cooling from 23 deg C to 15 deg C. Daum v has shown that at low pressure (p. Jun 15,  · A numerical method for solving the equations of motion with the aid of the experimental data allows the computation of the fluid temperature during the condensation process.

The addition of small amounts of carbon dioxide reduced the degree of supersaturation obtainable with bottled axendadeportiva.com by: High temperature and thermal non-equilibrium effects on the determination of free-stream flow properties in hypersonic wind tunnels Physics of Fluids, Vol.

30, No. 12 Theoretical Considerations to Extend the Operational Map of the VKI Longshot Hypersonic Wind TunnelCited by: Influence of real gas effects on the hypersonic rarefied flow near the sharp leading edge of a thin plate International Journal of Heat and Mass Transfer, Vol.

10, No. 1 Primary and Afterglow Emission from Low‐Temperature Gaseous Nitrogen Excited by Fast ElectronsCited by: Dec 17,  · The numerical method is first validated by comparing its prediction with experimental results from the literature. The effects of nitrogen condensation on hypersonic nozzle flows are then numerically examined.

The parameters at the nozzle exit under the conditions of condensation and no-condensation are axendadeportiva.com by: 8. The shocklike disturbances and pressure nonuniformities, which are seen near the throat of a supersonic nozzle operated with moist air, are because of the condensation of the water vapor and the attendant heat release in the flow.

Actual condensation is nearly always observed at supersonic speeds Cited by: EFFECTS OF SUPERSATURATION AND TEMPERATURE ON NUCLEATION AND CRYSTAL GROWTH IN A MSMPR CRYSTALLIZER. Iowa State University, Ph.D., Engineering, chemical X©rOX UniVOrSity Microfilrns, Ann Arbor, Michigan Detection of Nitrogen Flow Condensation in a Hypersonic Wind-Tunnel using a Static Pressure Probe.

Measurements with a slender static-pressure probe in the free-stream of the Longshot hypersonic wind-tunnel have recently been performed. Abstract. Cryogenic shock tubes immersed in liquid nitrogen were used to study condensation onset in argon diluted in helium carrier gas.

The condensation in the shock tube expansion fans was detected by light scattering; the pressure was measured and used to calculate temperature, assuming isentropic axendadeportiva.com by: In order to improve rarefied aerodynamic prediction, rarefaction and condensation effects have been investigated experimentally and numerically in this work.

Pitot pressure measurements for N2 nozzle flows have been carried out in the hypersonic rarefied wind tunnel (HRWT). Mar 01,  · Arthur, P. D.: Effects of Impurities on the Supersaturation of Nitrogen in a Hypersonic Wind Tunnel.

Doctoral Dissertation, California Institute of Technology, Pasadena, California (). Doctoral Dissertation, California Institute of Technology, Pasadena, California ().Cited by: Equilibrium Real-Gas Performance Charts for a Hypersonic Shock-Tube Wind-Tunnel employing Nitrogen - By - L.

Bernstein, * axendadeportiva.com(Eng.), Ph.D. September, Charts are presented covering a wide range of reflected-shock wind-tunnel operating conditions, using nitrogen as the working gas. Full text of "Theoretical and experimental investigation of condensation of air in hypersonic wind tunnels" See other formats CD r g NATIONAL ADVISORY COMMITTEE l-gf ^ FOR AERONAUTICS ' — TECHNICAL NOTE THEORETICAL AND EXPERIMENTAL INVESTIGATION OF CONDENSATION OF AIR IN HYPERSONIC WIND TUNNEI^ By H.

Guyford Stever and Kenneth C. [1] Many factors control the ice supersaturation and microphysical properties in cirrus clouds. We explore the effects of dynamic forcing, ice nucleation mechanisms, and ice crystal growth rate on the evolution and distribution of water vapor and cloud properties in nighttime cirrus clouds using a one-dimensional cloud model with bin microphysicsCited by: Dec 01,  · Gas exchange and bubble-induced supersaturation were measured in a wind-wave tank using total gas saturation meters.

The water in the tank was subjected to bubbling using a large number of frits at a depth of axendadeportiva.com by: 9. Arthur, P. D., "Effects of Impurities on the Supersaturation of Nitrogen in a Hypersonic Wind Tunnel", Ph.

Thesis, California Institute of Technology, "The Condensation of Air in a Hypersonic Wind Tunnel", IAS Paper No.Institute of the Aerospace Sciences, New York Also published in AIAA Journal, Vol. I, No. 5, pp. Water passing through the power-generating turbines or otherwise not exposed to the aerating effect of the spill- ways does not become supersaturated with nitrogen.

Nitrogen supersaturation levels above percent produce symptoms of gas bubble disease in fish, and levels above percent are lethal. issolved gas supersaturation (DGS) is a condition that occurs when the partial pressures of atmospheric gases in solution exceed their respective partial pressures in the atmosphere.

Individual atmospheric dissolved gases (oxygen, nitrogen, and trace gases such as argon and carbon dioxide) can often be supersaturated without adverse effects on.

EXPERIMENTAL STUDIES OF HYPERSONIC BOUNDARY-LAYER TRANSITION AND EFFECTS OF WIND-TUNNEL DISTURBANCES By P. Calvin Stainback and Richard D. Wagner Langley Research Center F.

Kevin Owen* and Clifford C. Horstman Ames Research Center SUMMARY Boundary-layer transition data on cones and free-stream disturbance levels wereCited by: The juvenile rock carp were exposed to water with different levels of supersaturation (%, %, %, %, %, %, %, and %) and depth of m at 25 °C for 60 h.

Median lethal time (LT 50) was used to assess the lethal responses corresponding to different levels of gas axendadeportiva.com by: Dec 10,  · Supersaturation is difficult to diagnose with a water test kit since most kits do not measure dissolved nitrogen.

You should consider a diagnosis of supersaturation disease for any acute deaths that cannot be attributed to other water quality disorders or specific pathogens or toxins.