How to calculate gas flow velocity
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If the gas flow rate is known and we want to find the gas velocity, is it the gas flow rate divided by the cross-sectional area? Does pressure have anything to do with this?
This post was last edited by rockmantom on 2012-1-4 08:10. In a given piping system, it is actually the pressure difference that determines the gas flow velocity, which in turn determines the gas flow rate. If the flow rate remains constant, then the flow velocity will also be constant for a given pipe cross-sectional area
This post was last edited by DXJ122 on 2012-1-4 at 10:54. To find the gas flow velocity once the gas flow rate is known, it is necessary to divide the gas flow rate by the cross-sectional area. Pressure is not considered when calculating flow velocity.
The concept of pressure is already included in the actual flow rate; it is important to determine whether it is the mass flow rate in m3/h or Nm3/h. If it is a mass flow rate, it needs to be converted into an actual volume flow rate before the velocity can be calculated.
When the volumetric flow rate is fixed, pressure is not considered. Long-distance pipelines need to take pressure drop into account