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Wednesday, August 5, 2020 | History

3 edition of Interferometric data for a shock-wave/boundary-layer interaction found in the catalog.

Interferometric data for a shock-wave/boundary-layer interaction

Stephen E. Dunagan

Interferometric data for a shock-wave/boundary-layer interaction

by Stephen E. Dunagan

  • 352 Want to read
  • 37 Currently reading

Published by National Aeronautics and Space Administration, Ames Research Center, For sale by the National Technical Information Service in Moffett Field, Calif, [Springfield, Va .
Written in English

    Subjects:
  • Holographic interferometry.,
  • Turbulent boundary layer.

  • Edition Notes

    StatementStephen E. Dunagan, James L. Brown, and John B. Miles.
    SeriesNASA technical memorandum -- 88227.
    ContributionsBrown, James L., Miles, John B. 1902-, Ames Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL17658515M

    Shock Wave Boundary Layer Interaction • J. Brown et al, NASA Ames • Axisymmetric compression corner • Mach • 30 deg. conical flare • Data – LDV • Mean velocities • Reynolds stresses – Surface static pressures – Interferometry – Schlieren   Hi In the case of a moving ramp/oscillating flap at supersonic speeds(m=), we get a shock wave boundary layer interaction which is although mentioned in most research papers but no solid literary piece is found on it.(as i checked out).

    book, Frequency-Resolved Optical Gating: The Measurement of Ultrashort Laser Pulses, Kluwer Academic Publishers, Today, more than twenty-five years after its introduction, interferometric autocorrelation, like its cousin, intensity autocorrelation, is considered obsolete. Better, more powerful techniques exist that are easier to perform. Rules for designing optimal data acquisition and processing sequences for interferometric analyses in nondesert parts of the world are (1) to use the longest radar wavelengths possible, within ionospheric scintillation and Faraday rotation limits, (2) for topography, maximize interferometer baseline within decorrelation limits* and (3) for.

    In this paper, a novel optical approach to double the sensitivity to angular rate of interferometric fiber optic gyroscope (IFOG) is proposed. Two fiber polarization combiner/splitters (FPCSs), as the key components, are added in the traditional IFOG light path. The FPCSs are able to either combine two orthogonal polarizations transmitting at two different polarization-maintaining . An interferometric imaging biosensor using weighted spectrum analysis to confirm DNA monolayer films with attogram sensitivity. Talanta , , DOI: /a Kewu Li, Shuang Wang, Liming Wang, Hui Yu, Ning Jing, Rui Xue, Zhibin Wang. Fast and Sensitive Ellipsometry-Based Biosensing.


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Interferometric data for a shock-wave/boundary-layer interaction by Stephen E. Dunagan Download PDF EPUB FB2

An experimental study of the axisymmetric shock-wave / boundary-layer strong interaction flow generated in the vicinity of a cylinder-cone intersection was.

Get this from a library. Interferometric data for a shock-wave/boundary-layer interaction. [Stephen E Dunagan; James L Brown; John B Miles; Ames Research Center.]. An illustration of an open book.

Books. An illustration of two cells of a film strip. Video. An illustration of an audio speaker. Full text of "Interferometric data for a shock-wave/boundary-layer interaction" See other formats. Interferometric data for a shock-wave/boundary-layer interaction.

By John B. Miles, James L. Brown and Stephen E. Dunagan. Abstract. An experimental study of the axisymmetric shock-wave / boundary-layer strong interaction flow generated in the vicinity of a cylinder-cone intersection was conducted.

The study data are useful in the. Interferometric synthetic aperture radar, abbreviated InSAR (or deprecated IfSAR), is a radar technique used in geodesy and remote geodetic method uses two or more synthetic aperture radar (SAR) images to generate maps of surface deformation or digital elevation, using differences in the phase of the waves returning to the satellite or aircraft.

The interaction between a shock wave and a boundary layer often leads to extremely detrimental effects, especially if the shock is strong enough to separate the boundary layer. When this happens, there occurs a rapid growth of the dissipative region along with a dramatic intensifying of turbulent fluctuations with the frequent occurrence of.

The results of a holographic interferometric and analytical examination of shock wave/turbulent boundary layer interactions occurring in a flow near a cone-cylinder intersection are reported. A Mach flow with an Re of 18 million was used, along with cone angles of20 and 30 deg.

Negligible, incipient and large scale separations were. Holographic interferometric investigation of shock wave interaction with a ramp Shock Waves, Vol. 2, No. 3 Subcritical flow studies on two-dimensional external compression supersonic inlets. Shock Wave–Boundary-Layer Interactions: Why They Are Important.

The repercussions of a shock wave–boundary layer interaction (SBLI) occurring within a flow are numerous and frequently can be a critical factor in determining the performance of a vehicle or a.

Unsteadiness in transonic shock-wave/boundary-layer interactions: experimental investigation and global stability analysis 24 September | Journal of Fluid Mechanics, Vol. Development of a Dual-PIV system for high-speed flow applications. Interferometry is a family of techniques in which waves, usually electromagnetic waves, are superimposed, causing the phenomenon of interference, which is used to extract information.

Interferometry is an important investigative technique in the fields of astronomy, fiber optics, engineering metrology, optical metrology, oceanography, seismology, spectroscopy (and its.

"A Holographic Interferometric Study of an Axisymmetric Shock-Wave/Boundary Layer Strong Interaction Flow," AIAA Paperpresented at AIAA 18th Fluid Dynamics and Plasmadynamics and Lasers Conference, Cincinnati, Ohio, July, A combined experimental and computational investigation of an axisymmetric turbulent shock-wave boundary-layer interaction flow is presented.

Experimental measurements include both mean and fluctuating data obtained by LDV techniques and identify large scale unsteady motions associated with shock induced separation. Shock-wave boundary layer interaction (SBLI) is one of the most important phenomenon which occurs in supersonic inlets that will result in a very complicated flow structure, 3D.

An experimental study has been conducted in a three-dimensional, supersonic shockwave/boundary-layer interaction (3-D SW/BLI) with the intent of providing accurate experimental data for turbulence modeling and computational fluid dynamics (CFD) code validation. The experiment was performed in the High Reynolds Channel 1 (HRCI) wind tunnel.

Introduction to Transonic Interactions. By definition, transonic shock wave–boundary layer interactions (SBLIs) feature extensive regions of supersonic and subsonic flows.

Typically, such interactions are characterized by supersonic flow ahead of the shock wave and subsonic flow downstream of it. The paper presents various approaches to wind tunnel data analysis when identifying the shock wave boundary layer interaction type.

The investigation. The interaction between the shock wave and boundary layer and its induced separation is an undesirable phenomenon in the design of supersonic systems.

The experimental documentation of a three-dimensional shock-wave/boundary-layer interaction in a nominal Mach 3 flow is presented. The model consisted of a sting-supported cylinder, aligned with the free-stream flow, and a 20 deg half-angle conical flare offset cm from the cylinder centerline.

Surface oil flow, laser light sheet illumination and schlieren were. Book Search tips Selecting this option will search all publications across the Scitation platform Selecting this option will search all Low-frequency unsteadiness of shock-wave/boundary-layer interaction in an isolator with background waves Physics of Two types of oscillations can be identified through the pressure data, and type III is.

Abstract. The effect of transition location on the interaction between an oblique shock-wave and a boundary-layer at \(M = \) on a flat plate is investigated via direct numerical simulations. It is shown that the shock trips transition at the impingement location and the effect of the impingement location on the separation is studied for laminar, transitional and turbulent interactions.A pulsed-plasma jet actuator is used to control the unsteady motion of the separation shock of a shock wave/boundary layer interaction formed by a compression ramp in a Mach 3 flow.

The actuator is based on a plasma-generated synthetic jet and is configured as an array of three jets that can be injected normal to the cross-flow, pitched, or pitched and skewed.Graphene-based sensors are of great interest in research due to their high specific surface area and high electron mobility that make them suitable for numerous advanced applications.

In this paper, selective molecular detection using an antigen–antibody reaction on suspended graphene with a cavity-sealing s.