Method and system for modeling valve dynamic behavior using computational fluid dynamics
AssigneeHoneywell International Inc.
InventorSrikanth Ranganathan
Life of this patent
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Abstract
A system for modeling fluid flow in a valve (10) includes a section for modeling a main fluid flow domain having an inlet (25), a first outlet (26) and a second outlet using a first grid size, a section for modeling a leakage fluid flow domain (38) having an inlet that includes the main fluid flow domain second outlet and a leakage fluid flow outlet using a second grid size, and a section for iteratively calculating fluid flow in the main fluid flow domain based on leakage flow as determined by the section for modeling leakage fluid flow. Also a method for modeling fluid flow in a valve.
Claims16
A method of modeling fluid flow in a valve comprising the steps of:
- a) defining a main fluid flow domain having an inlet and an outlet;
- b) defining a leakage fluid flow domain having an inlet in communication with the main fluid flow domain and an outlet;
- c) modeling fluid flow from the main fluid flow domain inlet to the main fluid flow domain outlet assuming no flow to the leakage flow domain;
- d) determining a pressure in the main fluid flow domain;
- e) setting a pressure at the leakage fluid flow domain inlet to the pressure and modeling fluid flow from the leakage fluid flow domain inlet to the leakage fluid flow domain outlet;
- f) determining a leakage fluid flow rate;
- and
- g) modeling fluid flow from the main fluid flow domain inlet to the main fluid flow domain outlet assuming leakage flow to the leakage flow domain at the leakage fluid flow rate.
A method of modeling fluid flow in a valve comprising the steps of:
- defining a main fluid flow domain and a leakage fluid flow domain with respect to the valve;
- modeling the main fluid flow domain using a first grid size without regard to leakage flow;
- determining a pressure field in the main fluid flow domain;
- modeling the leakage fluid flow domain using a second grid size smaller than the first grid size and using the main fluid flow domain pressure field to determine a leakage flow;
- directly calculating a coefficient of discharge for the valve.
A system for modeling fluid flow in a valve comprising:
- means for modeling a main fluid flow domain having an inlet, a first outlet, and a second outlet using a first grid size;
- means for modeling a leakage fluid flow domain having an inlet comprising the main fluid flow domain second outlet and a leakage fluid flow outlet using a second grid size;
- and
- means for iteratively calculating fluid flow in the main fluid flow domain based on leakage flow as determined by the means for modeling leakage fluid flow.
Dependencies are inferred from the claim text.