CFD simulation and grid self-adaption based valve flow coefficient calculating method

A valve flow and coefficient calculation technology, applied in the direction of calculation, electrical digital data processing, special data processing applications, etc., can solve the problems of high valve flow coefficient cost, valve size specification restrictions, and limited calculation accuracy, so as to improve the boundary layer Grid, reduce workload and difficulty, improve the effect of simulation accuracy
CN105677964AActive Publication Date: 2016-06-15JIANGSU SHENTONG VALVE +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU SHENTONG VALVE
Publication Date
2016-06-15

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Abstract

The invention discloses a CFD simulation and grid self-adaption based valve flow coefficient calculating method. The CFD simulation and grid self-adaption based valve flow coefficient calculating method comprises the main steps that a 'valve-pipe' flow field model and a 'straight pipeline' flow field model are extracted based on a valve assembly body three-dimensional model; initial grids are divided for the flow field models, wherein multiple groups of initial grids different in scale are divided for the 'valve-pipe' flow field model; trial operation is performed by applying the groups of initial grids respectively, the change tends with grid scales of the obtained pressure differences are compared to select optimal initial grids; the optimal initial grids are applied to set different boundary conditions, and simulating calculation of corresponding flow coefficients is performed by combining a grid self-adaption technology; finally, the arithmetic average of the obtained flow coefficients is obtained to serve as a valve flow coefficient prediction result. The CFD simulation and grid self-adaption based valve flow coefficient calculating method can more rapidly and flexibly predict the flow capacity of a valve under various conditions, shorten a development period and improve the design quality and can effectively improve the calculation accuracy and reduce the dependence on specialization level of operators.
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Description

Technical field

[0001] The invention relates to the field of calculating the flow capacity of a valve, and is embodied in the calculation of the flow coefficient of the valve by a method combining CFD and grid self-adaptation. Background technique

[0002] The flow coefficient of the valve refers to the total flow of the medium in the pipeline flowing through the valve under constant pressure conditions per unit time. The flow coefficient reflects the flow capacity and energy-saving and environmental protection performance of the valve, and is an important process parameter and technical index of the valve. At present, many domestic valve manufacturers use the flow coefficient measured by the experimental method as the standard to measure the flow capacity of the valve, but the cost of the experiment is high, the cycle is long, and it consumes a lot of manpower and material resources.

[0003] With the development of computer technology and computational fluid dynamics (Com...

Claims

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