Thermoacoustic Theory of Viscous Fluid, Part 1-Energy Conversion and Energy Flux of Small Cycles.

DOI

Bibliographic Information

Other Title
  • 粘性流体の熱音響理論　第１部　微小サイクルのエネルギー変換とエネルギー流束
  • Energy Conversion and Energy Flux of Small Cycles
  • 微小サイクルのエネルギー変換とエネルギー流束

Abstract

Discussed are energy conversion and energy flux accompanied to oscillations of viscous fluid. The energy conversion per unit volume is shown to be ρm(∂T/∂p)S«p⋅dS/dt»+«u⋅∇p» for a small cycle, for which variations of pressure p and entropy S are small. ρm is time average of the density, u is the velocity and ∇p is the pressure gradient. « » indicates double operations of spatial average over crosssectional area of flow-channel and time average. «u⋅∇p» is a negative quantity corresponding to dissipation due to viscosity of fluid. The average of energy flux is shown to be enthalpy flux ρm«H⋅u» approximately, in the case that the velocity u and the mass flux «ρ⋅u» are small and the wave length is long. ρ and H are variations of the density and the enthalpy respectively. The enthalpy flux for small cycle is shown to be summation of heat flux and work flux: ρm«H⋅u»=ρmTm«S⋅u»+«p⋅u» where «p⋅u» is the work flux and ρmTm«S⋅u» is the heat flux. Final discussions are on the energy conversion, the work flux and the heat flux of adiabatic reversible small-cycle, isothermal small-cycle, polytropic small-cycle, isobaric small-cycle and isochoric small-cycle.

Journal

Details 詳細情報について

  • CRID
    1390001204612506752
  • NII Article ID
    130003672843
  • DOI
    10.2221/jcsj.27.543
  • ISSN
    18800408
    03892441
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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