Hydraulic Design of a Large-Scale Dredge Pump and Its Verification By Numerical Simulation
Type:
Presented during:
WODCON XIX: "Dredging makes the World a better place" - 2010, Beijing, China
Authors:
Hong Guo-Jun , Gao Zhong-Xin , Yang Xi-Gang
Abstract: A large-scale dredge pump with high performance is the ‘heart’ of a modern large-scale dredger whose working performances, such as flow rate, pump lift, power, hydraulic efficiency and durability, directly influence the dredger’s working efficiency and economic benefit. However, in China, the research on dredge pumps started late and the investment on it was low in proportion to other equipment. Thus, there is a big gap between the design and manufacture technology of large-scale dredge pumps of China and that of developed countries such as Holland. In this situation, it is necessary to design a desired large-scale dredge pump with large flow rate, high lift and high hydraulic efficiency for the dredging industries of China, thus gradually forming new design methods for dredge pumps. In this paper, the author will carry out a hydraulic design of a ZB258-130 dredge pump with a 1.3m inlet diameter on the basis of some related design methods, and verify its performances by Computed fluid dynamics (CFD) software. The results will show that the pump basically meets the design requirements, with its hydraulic efficiency near the designed operating point above 85% on average at the two planned rotational speeds. It means that we have mastered the basic design methods and can now design large-scale dredge pumps with high performances.
Keywords: Dredging, dredger, dredge pump, CFD, hydraulic efficiency.