In equations (3) and (4), A is the sectional area of the pipeline, m2; v is the flow velocity, m/s; P is static pressure, Pa; is the fluctuation value of system working pressure (dynamic pressure), where ρ is the gas density, kg/m3. It can be seen from Fig.3 and equations (3) and (4) that in order to achieve the predetermined vacuum degree, the working pressure of compressed gas supplied to the vacuum generator, P0, v0 and A0 (determined by the vacuum generator specifications), are constant.
In equations (3) and (4), A is the sectional area of the pipeline, m2; v is the flow velocity, m/s; P is static pressure, Pa; is the fluctuation value of system working pressure (dynamic pressure), where ρ is the gas density, kg/m3. It can be seen from Fig.3 and equations (3) and (4) that in order to achieve the predetermined vacuum degree, the working pressure of compressed gas supplied to the vacuum generator, P0, v0 and A0 (determined by the vacuum generator specifications), are constant.<br>
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