Pipe diameter after gas mixing
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Does anyone knowledgeable know how to calculate the diameter of a pipe resulting from mixing gases in two different pipes? For example, what is the diameter of a pipe obtained by mixing DN400 and DN500 pipes, and how is it calculated? ? ?
Based on the fluid flow rate, assume a diameter and calculate the pressure drop until it meets the requirements. Using software makes the process faster.
What kind of software is needed? There must be a formula for that
You can write one in FORTRAN by yourself; I wrote one once when I was in college! It’s a shame I can’t find it now; otherwise I could send it to you!
First, determine the flow pattern of the two-phase flow to prevent columnar flow and choking flow. The pipe diameter must be just right; neither too large nor too small is suitable.
Is it the same type of gas? At least the physical properties shouldn’t change after mixing, right? Knowing the flow rates of the two gases is the most basic approach for calculating the safe flow velocity ； If one is unaware of the fact that by using the relationship between diameter and the square of flow rate, taking the square root of the sum of the squares of the diameters of the two pipes gives the diameter of the main pipe, this method might not be very safe for gases with high hazards:loveliness:
The problem should be solved now, right? Hehe, it can be calculated using software – such tools are available in process calculation software. One can first simulate the mixing of the two materials, and then determine an appropriate pipe diameter for the mixed material by taking into account its flow rate and pressure drop. There are also specialized software programs for calculating pipe diameters, such as Piping, and I think they’re available on the Haichuan forum; give it a try.
The simple calculation principle is that the cross-sectional area of the combined main pipe should be equal to the sum of the areas of the two branch pipes; (400^2+500^2)^(0.5)=640, so a DN650 main pipe is sufficient for the combined pipeline.