超大型耙吸船舱内泥泵汽蚀性能分析  

Cavitation performance of the dredging pump in super large trailing suction hopper dredger

作　　者：秦亮[1] 刘长海[1] 李金峰[1] 杨正军 QIN Liang;LIU Chang-hai;LI Jin-feng;YANG Zheng-jun(CCCC Tianjin Dredging Co.,Ltd.,Tianjin 300461,China;Tianjin Key Laboratory for Dredging Engineering Enterpris,Tianjin 300457,China)

机构地区：[1]中交天津航道局有限公司,天津300461 [2]天津市疏浚工程技术企业重点实验室,天津300457

出　　处：《水运工程》2020年第10期178-181,共4页Port & Waterway Engineering

摘　　要：舱内泥泵汽蚀性能是决定超大型耙吸船施工能力的重要指标,然而国内建造的泥泵往往缺乏汽蚀性能数据。以国内首艘超大型1.8万m^3耙吸挖泥船为对象,研究其舱内泥泵汽蚀性能,建立流体动力学模型。首先获得流量-扬程、流量-效率、流量-功率等泥泵特性,并与已掌握的试验数据进行对比验证模型的可靠性;应用完整汽蚀模型研究汽蚀性能,并采用较国外更为严格的效率下降值作为临界汽蚀发生点;据此获得某挖泥转速下不同流量的必需汽蚀余量数据。研究方法和结论可供工程界及具体船舶施工参考。The cavitation performance of the dredging pump is an important index to determine the construction capacity of the super large trailing suction dredger.However,the domestic dredging pumps often lack cavitation performance data.Taking the first domestic super-large 18,000 m^3 trailing suction hopper dredger as the object,the cavitation performance of dredging pump is researched,and the fluid dynamics model is established.Firstly,the relationship between flow rate and flow head,flow efficiency,flow power are obtained,and the reliability of the model is verified by comparing with the experimental data.Complete cavitation model is applied to study the cavitation performance,and the critical efficiency decrease value which is more strict than the abroad criteria is used as the critical cavitation point.Then the NPSHr data of different flow rates at a certain dredging speed are obtained.The research methods and conclusions are used for reference for engineering and specific dredger.

关 键 词：超大型耙吸船 泥泵 汽蚀 吸入性能 

分 类 号：U616[交通运输工程—船舶及航道工程]