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METHOD FOR CALCULATING INNER DIAMETER OF RESTRICTION ORIFICE PLATE UNDER KNOWN OPERATING CONDITIONS AND PRESSURE DROP REQUIREMENTS
METHOD FOR CALCULATING INNER DIAMETER OF RESTRICTION ORIFICE PLATE UNDER KNOWN OPERATING CONDITIONS AND PRESSURE DROP REQUIREMENTS
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机译：在已知的操作条件下计算限制孔板内径和压降要求的方法
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摘要
A method for calculating an inner diameter of a restriction orifice plate under known operating conditions and pressure drop requirements, comprising the following steps: using an inner diameter of a pipe at 20°C, a linear expansion coefficient of a material used to fabricate the pipe and an operating temperature to calculate an inner diameter of the pipe at the operating temperature; using a mass flow amount, a kinematic viscosity of a medium in an operating state and the inner diameter of the pipe at the operating temperature to calculate a pipe Reynolds number; applying an orifice plate outflow coefficient formula to calculate an outflow coefficient according to a diameter ratio and the pipe Reynolds number; using a differential pressure and an absolute operating pressure at the upstream of the orifice plate to calculate a ratio of pressures at downstream and upstream end faces of the orifice plate; and using the inner diameter of the pipe at the operating temperature and the diameter ratio to calculate an inner diameter of the orifice plate at the operating temperature.
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