Excuse me, for a gas pipe with DN50 and a pressure of 0.5 MPa, how is the gas flow rate calculated if the valve is opened?
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Given a gas pipe with DN50 and a pressure of 0.5 MPa (stable continuous pressure), if the valve is opened to lead to the atmosphere, and ignoring the effect of temperature, how can the gas flow rate be calculated?
Pipe friction losses are not considered outside the valve; they are taken into account since the pipe is short
This post was last edited by Qingchengjun on 2016-7-14 at 13:54. The wind speed is calculated based on the speed of sound, which is 340 m/s; 340 x 0.05 x 0.05 x 3.14/4 = 0.667 m3/s. Is this information useful to you? What will be used to maintain a stable pressure of 0.5 Mpa?
http://www.doc88.com/p-3961621468920.html There is a paper here that explains the relationship between the escape velocity and the speed of sound
The gas equation is then given by flow rate = cross-sectional area * flow velocity