Читать книгу Hydraulic Fluid Power - Andrea Vacca - Страница 51

1 1 In the British units, the viscosity is expressed as (lbf · s)/ft.

2 2 The polytrophic constant can be assumed as a function of the dynamic of the process. For a fast compression or expansion process, γ ≅ 1.4 (adiabatic); for a slow process, γ ≅ 1 (isothermal). Intermediate choices, such as γ = 1.2, are often made to describe a more general situation.