Calculation program XLSM for gas-blocking orifice plates

2020-12-13View Original

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Three calculations are provided: 1. The ISO expansion coefficient method utilizes Y63 of 5167 to extend the calculation of Y under choked flow. A PDF paper of this theory is attached. 2. RW MILLER’s density correction method. This formula is adopted in various engineering software. 3. Opening calculation for the rate of pressure reduction. The calculation result for 1/2 shows a difference of 2.5%; see the XLS calculation. For devices that control flow using mechanical structures, this should be sufficient. A flow orifice plate for blocking must meet two criteria, which are essential to ensure accuracy; neither of them can be omitted: 1. t plate thickness/d opening at least > 0.3 2. The inner hole should not have chamfers. I ask fellow sailors for their corrections.

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Calculation program XLSM for gas-blocking orifice plates

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