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Friday, July 24, 2020 | History

2 edition of Normal reflection of a plane gaseous detonation wave in a tube found in the catalog.

Normal reflection of a plane gaseous detonation wave in a tube

A. H. Makomaski

Normal reflection of a plane gaseous detonation wave in a tube

by A. H. Makomaski

  • 387 Want to read
  • 38 Currently reading

Published by National Research Council of Canada in Ottawa .
Written in English

    Subjects:
  • Shock waves.,
  • Explosions.

  • Edition Notes

    Statementby A. H. Makomaski.
    SeriesMechanical engineering report MT, -58
    Classifications
    LC ClassificationsTJ1 .M45 no. 58
    The Physical Object
    Pagination1 v. (various pagings)
    ID Numbers
    Open LibraryOL4658861M
    LC Control Number77525325

    Problem The electric field phasor of a uniform plane wave is given by E yˆ 10 ej0 2z (V /m). I f thp as vloc iw 5 8 nd r permeability of the medium is µr 2 4, find (a) the wavelength, (b) the frequency f of the wave, (c) the relative permittivity of the medium, and (d) the magnetic field H z t. Solution: (a) From E yˆ10ej0. polarized wave on an interface with a medium with lower refractive index. Justify your answer with the necessary calculations. 14 A plane wave propagating in air is characterized by the following phasor H~ i(x,z) = e−j(3x+4z)(ˆz −ˆx) (A/m). This wave impinges on a perfectly conducting surface located at z=0. Determine.

    American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA   Abstract. Journal of Engineering Physics and Thermophysics, Vol. 85, No. 2, March, HEAT AND MASS TRANSFER IN COMBUSTION PROCESSES PHYSICOMATHEMATICAL MODELING OF SUPPRESSION OF GASEOUS DETONATION BY CHEMICALLY INERT PARTICLES a b A. V. Fedorov, P. A. Fomin, UDC a c D. A. .

    sidered a continuous detonation wave, it is not station-ary as in some continuous detonation-wave engine con-cepts, and propagates in the azimuthal direction from left to right through the chamber near the injection wall, and the detonated products expand azimuthally and axially to the exit plane at the top of the Size: KB. Shock and detonation waves. CJ and ZND models of detonation. Fundamentals of shock response of solids. Spall. Shock growth & decay. Graphical solution of plane-shock transmission. Initiation of detonation. Mining and military—setting requirements to match the application--Gurney energies, overpressures, role of metallization, simple models.


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Normal reflection of a plane gaseous detonation wave in a tube by A. H. Makomaski Download PDF EPUB FB2

Average speed of the gaseous detonation wave in a bifurcated tube at different p 0. even for the self-sustaining detonatio n wave. Thus the measured maximum pressure. The reflected wave is in phase with the incident wave. The particle velocity at the boundary is zero. The acoustic pressure amplitude at the boundary is equal to twice the pressure amplitude of the incident wave and it is maximum.

Case 2: Consider an incident plane wave that encounters a resilient boundary. This is the case if the specific. Nikolova LECTURE PLANE WAVE REFLECTION AND TRANSMISSION 8 Reflection and Transmission (Fresnel) Coefficients (Review) • by definition the reflection coefficient Γgives the ratio of the reflected to incident tangential E-field component at the interface • the ratio of the reflected to incident tangential H-field component at the interface is −ΓFile Size: KB.

In this paper the Deflagration to Detonation Transition (DDT) process of gaseous H2-O2 mixture and Mach reflection of gaseous detonation wave on a. In this study, we figured out experimentally the influence by curvature of oblique detonation waves (ODWs) around hypersonic spherical projectiles.

And we compared to require the boundary condition on flow region by the measurement of incident detonataion wave angle for two reflection model of normal reflection and mach : Satoshi Sumiya, Shinichi Maeda, Jiro Kasahara, Akiko Matsuo. The Mach reflection starting angle meets the requirements of low-stem Mach reflection – the reflection wave catches up with the intersection point of the incident wave and reflection wave, and then the combined low-stem Mach shock wave perpendicular to the ground is formed (see Fig.2).

2 0 0 2(1) sin 2(1) f M rM PP PP. Microwave Reflection from Detonation Waves in Equimolar C2H at Low Pressures HITOSHI YAMAMURA AND KO SAITO Department ofChemistry, Faculty ofScience, Hiroshima University, Higashisenda-machi, Hiroshima, Japan Microwave reflection was applied to the study of detonation waves of equimolar oxyacetylene mix ture in the initial pressure range by: 3.

Reflection function of a plane sound wave in a cylindrical tube J. Polack, X. Meynial, J. Kergomard, C. Cosnard and M. Bruneau Laboratoire d Acoustique, U.A.-C.N.R.S.BPLe Mans Cedex, France (Reçu le 12 novembreaccepté le 26 janvier ) Résumé. La dissipation et la dispersion d ondes planes dans un tuyau cylindrique étant File Size: 1MB.

During the examination of detonation-driven deformation, discrepancies were dis-covered in our understanding of reflected gaseous detonation behavior.

Previous models did not accurately describe the nature of the reflected shock wave, which mo-tivated further experiments in a detonation tube with optical access. Pressure sensors. The generation of detonation by coalescing spherical deflagration waves detonation transition were observed, depending on the appearance of a subcriti- cal, critical or supercritical energy regime [4] in the Mach stem.

The subcritical type is characterized by the fact that the Mach stem starts as a deflagration : E. Schmolinske. Reflection of Spherical or Plane Waves. When a spreading spherical wave reaches a wall or other obstacle, it is either reflected or scattered.A wavefront is reflected when it impinges on a surface which is flat over at least a few wavelengths in each direction.

Reflected wavefronts can be easily mapped using ray tracing, i.e., the reflected ray leaves at an angle to. with the normal to the plane reflector. The plane of incidence can be represented by the unit normal vector to the plane wave in the propagation direction and can be computed as (Ferguson and Margrave, ) pˆ= p1 ˆi+p2 ˆj+qˆk p p2 1 +p2 2 +q2, (7) where p1,p2 are the input plane wave parameters and qis the vertical slowness in the inci.

An airplane moving with the velocity of the sound generates the shock wave. Section Reflection and Transmission at Normal Incidence Problem A plane wave in air with an electric field amplitude of 20 V/m is incident normally upon the surface of a lossless, nonmagnetic medium with εr = Determine: (a) the reflection and transmission coefficients, (b) the standing-wave ratio in the air medium, andFile Size: KB.

Dependence of the Shape of a Detonation Wave Front on the Detonation Wave Velocity upon Detonation of a Cylindrical Charge Topics detonation, ddk, derivatives, equations, velocity, ddi, wave, tan, functions, dpi, detonation wave, wave velocity, initial conditions, differential equations, wave front, ordinary differential.

Brossard J, Leyer JC, Desbordes D, Saint Cloud JP, Hendrick S, Gamier JL, Lannoy A, Perrot J () Air blast unconfined gaseous detonation. In: Kuhl AL et al. (eds) Dynamics of Explosions.

Progress in Astron. and Aeron. Vol. 94 AIAA, Washington, DC, pp – Google ScholarCited by: 9. Stabilization of a detonation wave in a stoichiometric hydrogen–air mixture flowing at a supersonic velocity into a plane symmetric channel with constriction has been studied in the framework of a detailed kinetic mechanism of the chemical interaction.

Conditions ensuring the formation of a thrust-producing f low with a stabilized detonation wave in the channel are Cited by: 1. 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.

3 2. Canonical Geometry: Dielectric Slab Figure shows the geometry. We have a dielectric slab of thickness d and relative permittivity. 2 1 r ε ε ε ≡ () A plane wave is incident from the left with angle of incidence ψi giving 1cos 1 sin 1iz x() ()ψψii 1cos1sin1rz x() ()ψψii =− File Size: KB.

frequency of a normally incident plane wave. For the UC-EBG, the frequency for in- phase reflection reasonably matches with the drop in S This indicates that the region for suppression of EM wave can be different from in-phase reflection for normal plane wave. This is because the suspended strip supports a quasi TEM mode with the dominant.

Problem A plane wave in air with Eei =yˆ 20e−j(3x+4z) (V/m) is incident upon the planar surface of a dielectric material, with εr =4, occupying the half-spacez ≥0. Determine: (a) The polarization of the incident wave. (b) The angle of incidence. (c) The time-domain expressions for the reflected electric and magnetic Size: 67KB.Figure Wave fronts and wave vectors of two plane waves with the same wavelength but oriented in different vertical bands show regions of constructive interference where wave fronts coincide.

The vertical regions in between the bars have destructive interference, and hence define the lateral boundaries of the beams produced by the superposition.Inner structure of a weak shock wave Formulation Dimensional analysis Analysis ZND structure of detonations Selection mechanism of the CJ wave.

Lecture Initiation of detonation Direct initiation Spontaneous initiation and quenching Deflagration-to-detonation transition 12 Classification of normal modes.