Title :
Study on the improvement of flow characteristics for the optimal design of minimum flow valve with labyrinth channel
Author :
Na Zhang ; Yanhui Li ; Zhaozheng Lv ; Lisheng Zhang ; Jing Huang
Author_Institution :
Wuhan Boiler Group Valve Co. Ltd., Wuhan, China
Abstract :
A connecting groove is added to the minimum flow valve with labyrinth channel as the optimized structure for flow field, and the internal flow characteristics of the valve are simulated by CFD method in a specific working condition. The result indicates that with the same pressure drop between the import and export, cavitation appears in the minimum flow valve under the specific working condition. But the value of minimum pressure is greater than that of the corresponding saturated vapor pressure all the time when a connecting groove is added. By comparison of the characteristic curves of the valve before and after adding a connecting groove, the flow coefficient of model with optimized structure is slightly greater than that of the original model. Meanwhile the resistance coefficient of the former is slightly less than that of the latter. In addition, the characteristics of the pressure and velocity distribution show advantages of the connecting groove in the matter of hydraulics.
Keywords :
cavitation; channel flow; computational fluid dynamics; design engineering; hydraulic systems; valves; CFD method; cavitation; connecting groove; flow coefficient; flow field; flow valve characteristics; hydraulics; internal flow characteristics; labyrinth channel; minimum flow valve; optimized structure; pressure distribution; resistance coefficient; saturated vapor pressure; velocity distribution; Connecting Groove; Flow Coefficient; Labyrinth Channel; Minimum Flow Valve; Resistance Coefficient;
Conference_Titel :
Fluid Machinery and Fluid Engineering, 2014 ISFMFE - 6th International Symposium on
Print_ISBN :
978-1-84919-907-0
DOI :
10.1049/cp.2014.1202
