摘要
通过联合数值模拟求得设计转速下泵扬程-流量和效率-流量曲线和泵相似定理,计算得到混流式喷水推进泵量纲为一的特性曲线。进一步由计算流体动力学(CFD)计算得到空化条件下泵扬程和效率随吸口比转速变化的修正函数曲线。叶片面涡空化由降低进口总压来实现,转速和流量输入参数由非空化条件下喷水推进系统CFD计算求得。在全航速范围内,该特性曲线还可作为比转速与该泵相近的混流式喷水推进泵通用的特性曲线模型。
Performance curves for a mixed-flow waterjet pump were developed using numerical simulations to calculate the pump head-capacity and efficiency-capacity curves at the design speed using similarity. Then a correction function curve was developed to modify the head and efficiency versus suction specific speed during cavitation using computational fluid dynamics （CFD）. The pump＇s sheet cavitation is induced by reducing the inlet total pressure for a given capacity and rotational speed and flux input parameters are obtained from CFD simulations of the waterjet at the same speed without cavitation. These performance curves over the entire speed range can also be used as a generalized model for mixed-flow waterjet pumps having similar specific speed.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第8期1311-1315,共5页
Journal of Tsinghua University(Science and Technology)
基金
国防"十一五"预研项目
关键词
喷水推进泵
性能曲线
计算流体动力学
空化
waterjet pump
performance curves
computational fluid dynamics （CFD）
cavitation
