Search results for: MAGNETOACOUSTIC HEATING

• Magnetoacoustic heating in a quasi-isentropic magnetic gas

  Publication

  • A. Perelomova

  - PHYSICS OF PLASMAS - Year 2018

  The nonlinear heating of a plasma which associates with the transfer of energy of magnetoacoustic waves into that of the entropy mode, is analytically studied. A plasma is uniform and motionless at equilibrium. Perturbations in a plasma are described by a system of ideal magnetohydrodynamic equations. The equilibrium straight magnetic strength and the wave vector form a constant angle which varies from 0 to π/2. There exist four...

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• Magnetoacoustic Heating in Nonisentropic Plasma Caused by Different Kinds of Heating-Cooling Function

  Publication

  • A. Perelomova

  - Advances in Mathematical Physics - Year 2018

  The nonlinear phenomena which associate with magnetoacoustic waves in a plasma are analytically studied. A plasma is an open system with external inflow of energy and radiation losses. A plasma’s flow may be isentropically stable or unstable. The nonlinear phenomena occur differently in dependence on stability or instability of a plasma’s flow. The nonlinear instantaneous equation which describes dynamics of nonwave entropy mode...

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• MAGNETOACOUSTIC HEATING AND STREAMING IN A PLASMA WITH FINITE ELECTRICAL CONDUCTIVITY

  Publication

  • A. Perelomova

  - TASK Quarterly - Year 2019

  Nonlinear effects of planar and quasi-planar magnetosound perturbations are discussed. Plasma is assumed to be an ideal gas with a finite electrical conductivity permeated by a magnetic filed orthogonal to the trajectories of gas particles. the excitation of non-wave modes in the filed of intense magnetoacoustic perturbations, i.e., magnetoaciustic heating and streaming, is discussed. The analysis includes a derivation if instantaneous...

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• Magnetoacoustic Heating of Plasma Caused by Periodic MagnetosoundPerturbations with Discontinuities in a Quasi-Isentropic Magnetic Gas

  Publication

  • A. Perelomova

  - Archives of Acoustics - Year 2020

  The magnetoacoustic heating of plasma by harmonic or periodic saw-tooth perturbations at a trans-ducer is theoretically studied. The planar fast and slow magnetosound waves are considered. The wavevector may form an arbitrary angleθwith the equilibrium straight magnetic field. In view of variableθand plasma-β, the description of magnetosound perturbations and appropriate magnetosound heatingis fairly difficult. The scenario of...

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• It applications for the remote testing of hearing.

  Publication

  • A. Czyżewski
  • B. Kostek
  • H. Skarżyński

  - Year 2006

  Telemedycyna odgrywa coraz wiekszą rolę w diagnostyce i leczeniu osób z ubytkami słuchu. Jest to związane m.in. ze specyfiką badań audiometrycznych. Postęp technologiczny w dziedzinie aparatów słuchowych i implantów ślimakowych wymusza nowe metody diagnozy w audiologii, jak również w praktyce otolaryngologicznej. Serwis ''Telezdrowie'', w którym zaimplementowano liczne testy przesiewowe jest przykładem prowadzenia diagnostyki w...

• POLYMER TESTING

  Journals

  ISSN: 0142-9418 , eISSN: 1873-2348

• Unusual divergence of magnetoacoustic beams

  Publication

  • A. Perelomova

  - PHYSICS OF PLASMAS - Year 2022

  Two-dimensional magnetosonic beams directed along a line forming a constant angle h with the equilibrium straight magnetic field are considered. Perturbations in a plasma are described by the system of ideal magnetohydrodynamic equations. The dynamics of perturbations in a beam are different in the cases of fast and slow modes, and it is determined by h and equilibrium parameters of a plasma. In particular, a beam divergence may...

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• Effect of laser heating on cavitation behaviour of Fe-Cr-Mn coating.

  Publication

  • M. Szkodo

  - Year 2004

  W pracy przedstawiono badania odporności kawiracyjnej napoiny Fe-Cr-Mn po obróbce laserowej polegającej na przetapianiu napoiny wiązką lasera CO2 o mocy 1000W oraz jej nagrzewaniu w stanie stałym. Rezultaty badań wskazują,że po każdym rodzaju obróbki występuje inna podatność obrobionej powierzchni do odkształceń plastycznych pod działaniem obciążeń kawitacyjnych.

• Standing Waves and Acoustic Heating (or Cooling) in Resonators Filled with Chemically Reacting Gas

  Publication

  • A. Perelomova
  • W. Pelc-Garska

  - Archives of Acoustics - Year 2014

  Standing waves and acoustic heating in a one-dimensional resonator filled with chemically reacting gas, is the subject of investigation. The chemical reaction of A ! B type, which takes place in a gas, may be reversible or not. Governing equations for the sound and entropy mode which is generated in the field of sound are derived by use of a special mathematical method. Under some conditions, sound waves propagating in opposite...

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• Bearing testing machine with rotating load vector.

  Publication

  • J. Sikora

  - Journal of KONES - Year 2002

  W pracy przedstawiono koncepcję konstrukcyjną i prototyp stanowiska badawczego z wirująca reakcją łożyskową przeznaczonego do testowania wytrzymałości zmęczeniowej warstw ślizgowych w łożyskach poprzecznych. Konstrukcja i przeznaczenie maszyny zbudowanej w laboratorium tribologicznym Politechniki Gdańskiej jest zgodna z zaleceniami normy ISO 7905. Przeanalizowano zalety i wady maszyny badawczej o takim wzorcu obciążenia testującego.