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International Standard Serial Number:
ISSN 1001-4551
Sponsor:
Zhejiang University;
Zhejiang Machinery and Electrical Group
Edited by:
Editorial of Journal of Mechanical & Electrical Engineering
Chief Editor:
ZHAO Qun
Vice Chief Editor:
TANG ren-zhong,
LUO Xiang-yang
Tel:
86-571-87041360,87239525
Fax:
86-571-87239571
Add:
No.9 Gaoguannong,Daxue Road,Hangzhou,China
P.C:
310009
E-mail:
meem_contribute@163.com
Abstract: The internal flow characteristics of the check valve in the important service water system of a nuclear power plant are not understood, and the corresponding stress-strain analysis is lacking. At the same time, it is difficult to carry out experimental research. Therefore, the dynamic grid method was used to establish the fluid-solid coupling calculation model, and the simulation calculation was carried out, and the fluid-solid coupling characteristics of the swing check valve in the important service water system of nuclear power plant were studied. Firstly, based on the prototype of check valve of a nuclear power plant, the valve and water body model were established, and the final calculation model was determined after using the grid independence test. Then, the valve plate motion control rules were written using profile, the dynamic grid model was set up, and the interface and constraint conditions were set up by using ANSYS unidirectional fluid-structure coupling method to simulate the transient closing process of check valve. Finally, the velocity and pressure distribution of flow field and the stress and deformation changes of structure field with different opening degrees during valve closing were analyzed. The experimental results show that during the closing process, the maximum flow velocity of the flow field in the check valve occurring at the beginning of closing is 17.87m/s and it gradually decreases to 0m/s. The maximum equivalent force and maximum deformation of the check valve respectively appear at the connection between the shaft and the valve body and the lowest part of the valve plate, and the final maximum equivalent force and deformation are respectively 1.5474×108Pa and 4.74mm, which increase as the open degree decrease. The calculation results obtain the flow field change characteristics and the stress and deformation response characteristics of the check valve closing condition, improve the reliability of equipment operation, which can provide a reference for the optimal design of the equipment.
Key words: hydraulic control valve; rotating check valve; internal flow characteristics; stress-strain analysis; fluid-structure interaction; dynamic grid method; structural response characteristics
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