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1541. Abstract
... The Noether's Integrals in Optimal Problems of Hypersonic Aerodynamics . ... The heat transfer on the hypersonic aircraft surfaces can be investigated in the limits of boundary layer theory. Majority of works on the theory of optimal controlled boundary layer is connected with the control of incompressible liquid movement, the problems of compressible viscous gas optimal control are considered in a small number of publications. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/TheNoethersIntegralsinOptimalProblemsofHypersonicAerodynamics.htm -- 7.2 Кб -- 10.07.2002
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1542. Abstract
... The Normal Waves Excitation by the Pulse Parametric Acoustic Array in the Shallow-Water Waveguide . V.Kurin, S.A.Egorychev, S.N.Gurbatov, N.V.Pronchatov-Rubtsov (Nizhny Novgorod State University, Nizhny Novgorod, Russia) . ... Often as a source of a pulse radiation in shallow-water waveguides the parametric acoustics array are used. ... This experimental work is dedicated to the travel time examination of modal pulses at different methods of the waveguide excitation (linear and nonlinear). ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/TheNormalWavesExcitationbythePulseParametricAcousticArrayintheShallowWaterWaveguide.htm -- 6.9 Кб -- 10.07.2002
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1543. Abstract
... The Parametric Generation of Magnetic-Acoustic-Gravity Waves in an Atmosphere . M.Petukhov (Nizhny Novgorod State University, Nizhny Novgorod, Russia); Yu.V.Petukhov (Institute of Applied Physics of RAS, Nizhny Novgorod, Russia) . ... Both nonpropagating and propagating MAG waves are shown to be generated at the difference frequency via the nonlinear interaction of primary waves in the frequency range "forbidden" for propagation of MAG waves during their linear generation. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/TheParametricGenerationofMagneticAcousticGravityWavesinanAtmosphere.htm -- 6.8 Кб -- 10.07.2002
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1544. Abstract
... The Periodic Phenomena and the Inerease of Resistance at Detachable to the Form Hydrodynamical Cavitation . ... In cavitations pipes the acoustic noise and pulsations of pressure on a surface of streamline bodies, and also cross vibrations and factors of resistance to a flow are investigated structure. ... In particular, at a flow of the cylinder the periodic track such as a track of Carman, even is observed when Reynolds numbers essentially exceeded critical values. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/ThePeriodicPhenomenaandtheInereaseofResistanceatDetachabletotheFormHydrodynamicalCavitation.htm -- 7.3 Кб -- 10.07.2002
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1545. Abstract
... The Photoexcitation of Hypersound in Ge in Presence of the Electric Field . ... The photoexcitation of the hypersound pulses in semiconductors is attractive problem due to the possibility of their acceleration. ... The time displacement of subnanosecond hypersound pulse in electric field was observed. ... It is shown that the application of electric field gives the amplification and the displacement of hypersound pulse in case if the drift velocity of eh-plasma is close to the velocity of sound. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/ThePhotoexcitationofHypersoundinGeinPresenceoftheElectricField.htm -- 6.8 Кб -- 10.07.2002
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1546. Abstract
... The Photon Density Effect in the Structure of Shock Wave . ... The peculiarity of the radiative (heat conduction dominated) shock structure consists in the possibility both to disappearing and appearing of prominent subshock - isothermal discontinuity which is dependent on the relation of photon number density to matter density n(ph)/n(m) =1.11p(ph)/p(m) ~ T^3/n(m), and on the effective number f degrees of freedom for the matter particles f(m) =f = 2E/n(m)kT at f(photon) = 6. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/ThePhotonDensityEffectintheStructureofShockWave.htm -- 6.5 Кб -- 10.07.2002
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1547. Abstract
... The Reflected Wave Caused by Acoustic Pulses . ... The method leads to an algorythmic procedure to define all possible types of motion in a concrete problem and to get the evolution equations accounting the modes interactions. ... Also, more exact evolution equations may be consequently derived. Since the non-periodic flows may be treated, a problem of the reflected wave caused by an acoustic plane pulse is considered in the framework of the present approach. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/TheReflectedWaveCausedbyAcousticPulses.htm -- 6.4 Кб -- 10.07.2002
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1548. Abstract
... The Regular Partially Invariant Submodels of the Rank Three for the Compressible Fluid . ... The gas dynamics model consisting of five first order equations which connects velocity vector, the density, the pressure has been investigated.Our equation of state describes the compressible fluid motion at the large pressure and high temperature. An optimal system of admitted subalgebra is known for such a model. ... The submodels are reduced to a canonical form by special change of the invariants. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/TheRegularPartiallyInvariantSubmodelsoftheRankThreefortheCompressibleFluid.htm -- 7.0 Кб -- 10.07.2002
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1549. Abstract
... The Resolution of Components of Wall Pressure Spectra for Experimental Study of Wall-Near Pressure Fluctuations Beneath Turbulent Boundary Layer . ... The problem of vibration noise compensation in hydrodynamic acoustics is important for the study of near-wall pressure fluctuations since a miniature piezoelectric sensor not only reacts to turbulent pressure but also generates a signal which is proportional to the applied force. ... An active method of vibration control has been developed. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/TheResolutionofComponentsofWallPressureSpectraforExperimentalStudyofWallNearPressureFluctuationsBeneathTurbulentBoundaryLayer.htm -- 7.3 Кб -- 10.07.2002
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1550. Abstract
... The Role of Acoustic Radiation During the Interaction of a Shock Wave with a Turbulent Flow . ... Density fluctuations were investigated ahead of and behind a shock wave propagating through a turbulent gas flow both experimentally and theoretically. ... We found out that after the passage of the shock wave the turbulent lengthscale is ten times as small as its value ahead of the wave. ... Vortices in the turbulent flow emit acoustic waves while changing their velocity. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/TheRoleofAcousticRadiationDuringtheInteractionofaShockWavewithaTurbulentFlow.htm -- 7.0 Кб -- 10.07.2002
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1551. Abstract
... The Second Rank Invariant Submodels for the Special Compressible Fluid . ... The model of gasdynamics with the special state equation has been considered. ... The optimal system of admitted subalgebra of this gasdynamic model is known. ... One invariant is linear on the entropy and one invariant is also a linear function of the density. ... Secondly, the right-hand sides of equations are linearly dependent on the coordinates of the velocity in the Cartesian coordinates. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/TheSecondRankInvariantSubmodelsfortheSpecialCompressibleFluid.htm -- 7.1 Кб -- 10.07.2002
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1552. Abstract
... The Study of Acoustic Nonlinearity Parameter Tomography in Reflection Mode . ... Based on the theory of propagation of reflected second harmonics in the layered medium and the insert-substitution method of finite amplitude sound wave, the computer simulation of nonlinearity parameter tomography from calculated reflected second harmonic data and filtered convolution algorithm used in the conventional CT technique is reported and the images of B/A for several biological specimens are reconstructed. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/TheStudyofAcousticNonlinearityParameterTomographyinReflectionMode.htm -- 7.0 Кб -- 10.07.2002
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1553. Abstract
... The Technologies of the Active-Passive and Parametrical "Transmissive" Method of Hydrolocation in Solving the Problems of Sea Water Areas' Monitoring . ... Discussed are the nature of the low-frequency .transmissive. (active-passive and parametrical) method of hydrolocation, the technologies of remote measuring by this method the characteristics of the fields of marine objects and environment. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/TheTechnologiesoftheActivePassiveandParametricalTransmissiveMethodofHydrolocationinSolvingtheProblemsofSeaWaterAreasMonitoring.htm -- 6.5 Кб -- 10.07.2002
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1554. Abstract
... The Validity of Nonisentropic Riemann-Like Invariants for Reverberating Shocks System and Some Applications with the Real Equation of State Correction . ... The real equation of state (EOS) effect consists, for the fundamental instance, in the variation of Cp/Cv, as during photon number density increase, i.e. in evolution f = 3->6. ... The asymptotics of the reverberation corresponds to the limit D->a, with more abstract limit of the infinite frequency of reverberating acoustical waves. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/TheValidityofNonisentropicRiemannLikeInvariantsforReverberatingShocksSystemandSomeApplicationswiththeRealEquationofStateCorrection.htm -- 6.9 Кб -- 10.07.2002
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1555. Abstract
... The Vector - Phase Structure Features of Superlow Frequency Fluctuations of Acoustic Fields, Stimulated by Interaction with Internal Waves, Generated by a Streamlined Body . ... The experimental dates of superlow frequency fluctuations of the acoustic signal fields from the determined source on internal waves, generated by a body, streamlined by a water are discussed. ... The theoretical interpretation of the excitation mechanism of the internal waves short waves team is offered. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/TheVectorPhaseStructureFeaturesofSuperlowFrequencyFluctuationsofAcousticFieldsStimulatedbyInteractionwithInternalWavesGeneratedbyaStreamlinedBody.htm -- 7.2 Кб -- 10.07.2002
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1556. Abstract
... Therapeutic Effect of Second Harmonic Focal Spots in High Intensity Focused Ultrasound Treatment of Tissues with Nonlinear Acoustic Properties . ... It has long been known that the ultrasound intensities used in high intensity focused ultrasound are sufficient to cause non-linear acoustic effects. ... Consequently, the hyperthermia induced in these regions is due solely to the second harmonic field induced by the non-linear acoustic behavior of the tissue. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/TherapeuticEffectofSecondHarmonicFocalSpotsinHighIntensityFocusedUltrasoundTreatmentofTissueswithNonlinearAcousticProperties.htm -- 7.3 Кб -- 10.07.2002
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1557. Abstract
... Thermonuclear Model of Sonoluminescence . ... In experiments the even more short-wave x-ray site was found out [1,2]. ... Stanukovich K.P., Khavroshkin O.B. The phenomenon of x-ray radiation by a cavitation cell. ... Limar V.V., Pozukov U.P., Khavroshkin O.B. About an opportunity of x-ray radiation by a cavitation cell. ... Stanukovich K.P., Khavroshkin O.B. The phenomenon of occurrence pulse thermonuclear reaction in a nucleus of a collapsd cavitation cell in usual water. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/ThermonuclearModelofSonoluminescence.htm -- 7.1 Кб -- 10.07.2002
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1558. Abstract
... In such situations it is natural to consider models which allow solutions in which a field variable or its space or time derivative may experience a jump discontinuity. Solutions with jumps are natural for hyperbolic equations, and their existence is evident. ... In this case, the existence of a solution with jumps is not evident. аа Let us restrict attention to models describing the "diffusive" spreading of a film, which starts initially with a jump in its surface elevation. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/ThinFilmsofNonNewtonianFluidswithJumpDiscontinuities.htm -- 7.1 Кб -- 10.07.2002
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1559. AUTHOR : Thomas J
. AUTHOR : Thomas J. L. 1. ааа Focusing of Finite-Amplitude Waves at Fold Caustics . R.Marchiano, F.Coulouvrat (Laboratoire de Modelisation en Mecanique, Universite Pierre et Marie Curie, CNRS, Paris, France); J.L.Thomas (Laboratoire Ondes et Acoustique, CNRS, Paris, France) .
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/ThomasJL.htm -- 5.8 Кб -- 10.07.2002
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1560. AUTHOR : Thompson M
. AUTHOR : Thompson M. W. 1. ааа Measurement of Rayleigh Streaming in High-Amplitude Standing Waves . A.A.Atchley, M.W.Thompson (Graduate Program in Acoustics, The Pennsylvania State University, State College, PA, USA) .
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/ThompsonMW.htm -- 5.7 Кб -- 10.07.2002
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