Relationship between gas flow velocity and cross-sectional area
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As stated in the title: 1. When the gas flow velocity is less than 0.2 Mach, it can be treated as an incompressible medium; in other words, the Bernoulli equation applies. The smaller the cross-sectional area, the higher the flow velocity and the lower the pressure. 2. When the flow velocity exceeds 0.2 Mach, compressibility must be taken into account. So what is the relationship between the cross-sectional area and the flow velocity at this point? (It seems that the larger the cross-sectional area, the higher the flow velocity?) ) 3. When the flow velocity exceeds the speed of sound, is it the same as in the second case?
There is only one answer: under the same conditions, the larger the cross-sectional area, the lower the flow velocity