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Tuesday, May 19, 2020 | History

3 edition of High-temperature LDV seed particle development found in the catalog.

High-temperature LDV seed particle development

High-temperature LDV seed particle development

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  • 19 Currently reading

Published by National Aeronautics and Space Administration, Lewis Research Center, National Technical Information Service, distributor in [Cleveland, Ohio], [Springfield, Va .
Written in English

    Subjects:
  • Carbon.,
  • Carbon dioxide lasers.,
  • Grain size.,
  • High temperature.,
  • Laser beams.,
  • Laser doppler velocimeters.,
  • Pyrolysis.,
  • Spheres.

  • Edition Notes

    Other titlesHigh temperature LDV seed particle development.
    StatementMichael B. Frish and Vicky G. Pierce.
    SeriesNASA contractor report -- 182265., NASA contractor report -- NASA CR-182265.
    ContributionsPierce, Vicky G., Lewis Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL18078441M

    ABA-dependent inhibition of the ubiquitin proteasome system during germination at high temperature in Arabidopsis Rex Shun Chiu1,2, Shiyue Pan1,†, Rongmin Zhao1,2 and Sonia Gazzarrini1,2,* 1Department of Biological Sciences, University of Toronto Scarborough, Military Trail, Toronto, ON M1C 1A4, Canada, and 2Department of Cell and Systems Biology, University of Toronto, 25 Harbord. TSI equips fluid mechanics and particle diagnostics researchers with the state-of-the-art hardware, software and complete measurement systems. Our instruments provide diagnostics of fluid flow and particle/droplet sizing in a wide range of applications including: aerodynamics, hydrodynamics, spray diagnostics, multiphase flows, turbulent.

    A general procedure to prepare uniform gold-based bimetallic nanocrystals (NCs) is reported. The method relies on a seed-mediated approach in which deposition and in-situ alloying of a second metal (Ag, Pt, Hg, Sn, Cd) onto monodisperse Au seeds are performed at relatively high temperatures, giving access to bimetallic NCs of tunable compositions and properties. passing through the volume. Also, seed particle con-centration cannot be increased indefinitely without having an effect on the fluid motion. That stated, the challenges associated with a microscale LDV sampling volume are demanding but not prohibitive. Minor et al. () used LDV measurements in electrokinetic flow in.

    Tracer Particles and Seeding for PIV. Seeding particles for PIV. Proper tracer must be small enough to follow (trace) fluid motion and should not alter fluid or flow properties. Proper tracer must be large enough to be visible by the camera. Uniform seeding is critical to the success of obtaining velocity field. No seed particles, no data. Vortical Sheet Behavior in the Wake of a Rotor in Ground Effect. with specific focus on their contribution to the development of the near-wall flowfield at the ground plane. Two blade sets were tested: 1) a baseline untwisted blade and 2) a twisted blade with 17 deg of nose-down linear twist. “ On Seed Particle Dynamics in Tip Vortex.


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High-temperature LDV seed particle development Download PDF EPUB FB2

COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

The motivating application for this research was to manufacture particles that could be used as laser Doppler velocimetry (LDV) seeds in high-temperature high-speed flows. Though the particles made in this program will not evaporate until heated to about K, and thus could serve as LDV seeds in some applications, they are not ideal when the hot atmosphere is also oxidizing.

The motivating application for this research was to manufacture particles that could be used as laser Doppler velocimetry (LDV) seeds in high-temperature high-speed flows. Though the particles made in this program will not evaporate until heated to about K, and thus could serve as LDV seeds in some applications, they are not ideal when the hot atmosphere is also : Vicky G.

Pierce and Michael B. Frish. Thermophoretic Effects on Seeding Particles in LDV Measurements of Flames Article (PDF Available) in Combustion Science and Technology 99() August with 43 Reads.

Laser transit anemometer tests verified the operational capability of the seeding system. Measurements across an High-temperature LDV seed particle development book shock with a two-component laser Doppler velocimeter showed that the seed material spatially responded as micrometer diameter particle.

This site uses cookies. By continuing to use this site you agree to our use of cookies. To find out more, see our Privacy and Cookies policy. Scattering properties of seed particles: a review p. 3 Bias of measurement found in high-frequency pulsated reacting flow p.

17 Limited accuracy of turbulence measurement in laser Doppler anemometry p. 25 Comparison of signal extraction techniques in LDV signal processing p. Similar to pitot probes, hot wire anemometers were invasive and disturbed the flow field under study.

The first non-invasive point velocity measurement technique was Laser Doppler Velocimetry (LDV), which used a crossed pair of laser beams to measure the velocity of seed particles entrained in the flow. Particle image velocimetry (PIV) is an optical method of flow visualization used in education and research.

It is used to obtain instantaneous velocity measurements and related properties in fluid is seeded with tracer particles which, for sufficiently small particles, are assumed to faithfully follow the flow dynamics (the degree to which the particles faithfully follow the flow is.

The employment of pH stabilization techniques typically used to obtain stable dispersions in ceramic processing can provide a source of seed material for high temperature air flows. By pH stabilizing submicron alumina particles in ethanol, a stable dispersion is obtained which when atomized, produces a high quality aerosol.

Abstract. In perennial ryegrass seed yield is low. Pollination, fertilization and early stages of seed development are critical periods for the realization of. Influence of temperature on seed germination and the nutritional requirements for embryo growth in Arum maculatum L. BY H. PRITCHARD, J.

WOOD AND K. MANGER Jodrell Laboratory, Royal Botanic Gardens, Kew, Wakehurst Place, Ardingly, West Sussex RH17 6TN UK (Received 28 September ; accepted 7 December ) SUMMARY. thermographic laser Doppler velocimetry (thermographic LDV) [10]. In this study, 2 µm BaMgAl 10 O Eu2+ (BAM:Eu2+) phosphor particles were seeded in an electrically heated air jet.

A combined measurement volume is created at the intersection of two visible ( nm) continuous wave (CW) laser beams and a UV ( nm) CW laser beam. Study on the effect of air temperature on seed development and determination of the base temperature for seed growth in castor (Ricinus communis L.) Liv S.

Severino1, * and Dick L. Auld2 1Embrapa Algodªo, Rua Oswaldo Cruz, Campina Grande, PB, Brazil 2Department of Plant and Soil Science, Texas Tech University, Lubbock, TX Fig. 1 presents the XRD patterns of the silicon carbide ceramics fabricated through SiC seeds with particle size of 50 nm and nm, as well as through the seed-free process.

The crystal phase in all samples were identified as pure 6H-SiC, and the peak at 2θ = °, corresponding to the 6H-SiC (0 0 0 6) plane, could be identified, where their relative intensities were prominently greater. The temperature requirements for seed germination and nutritional requirements for embryo growth were investigated in seed populations of Arum maculatum L.

plants growing in South‐east England. Seeds freshly harvested from orange‐red berries were shown to require a protracted period of chilling at about 6 °C for germination to occur in either the light (12 h photoperiod) or the dark. Michael B. Frish. Physical Sciences Inc.

High-temperature LDV seed particle development. Article. May ; Measurement of high temperature thermophysical properties with electron beam.

commonly used for LDV seeding purposes, especially in high-temperature fows, was sampled simultaneously by an ISL whisker particle capture (WPC) device and an AEDC electrostatic aerosol sampler (EAS).

The aerosol was generated by fluidization of aluminum oxide (alumina). Imaging of small particles Relation between real particles and particle image recorded in the camera can be analyzed by the diffraction limited imaging of a small particle For a given aperture diameter D a and wavelength, the Airy spot size a diff D f d I x I / 2 0) (max = = Imaging of small particles (conts) With an imaging lens, the.

Twenty-Sixth Symposium (International) on Combustion/The Combustion Institute, /pp. – EXPERIMENTS AND NUMERICAL SIMULATION ON SOOT FORMATION IN OPPOSED-JET ETHYLENE DIFFUSION FLAMES H. WANG, D. DU,* C. SUNG and C. LAW Department of Mechanical and Aerospace Engineering Princeton University Princeton, NJUSA An.

Part I: Introduction to Nanoparticle Characterization with AFM 5 Revision.1/16/A Ensemble vs. Single-Particle Techniques Particle analysis techniques can generally be classified as ensemble or single-particle techniques.

With ensemble techniques, individual particles cannot be isolated.Velocity and Temperature Measurement in Supersonic Free Jets Using Spectrally Resolved Rayleigh Scattering J. Panda Middleburg Heights, Ohio Cleveland, Ohio Abstract The flow fields of unheated, supersonic free jets I.

INTRODUCTION from convergent and convergent-divergent nozzles operating at M =, and were.density of useful seed material. Small particle size and low specific gravity are desired to ensure that the particles accurately follow accelerations and decelerations in the flow.

The high temperature environment requires a refractory seed material which will not degrade, melt, or agglomerate.