摘要
T型喷口是一种附加在喷水推进装置后方,改变水流纵向喷射方向为横向的模型试验装置.该装置只在船体内部流道上产生力的作用,既可反映常规喷口推进船模自航状态下,推进装置的抽吸作用对船尾边界层的影响,又对船身浮态影响很小,仅通过船模阻力试验和获流区PIV测试试验,结合动量通量法换算,可将常规推进船模自航试验中,推进系统对船体阻力的影响分离出来.通过CFD手段,采用流量边界条件法,对某带有T型喷口推进装置的船模阻力性能进行数值模拟,并与模型试验结果进行比较分析.最后,对T型喷口装置的工作原理进行说明.
Abstract
The T-shaped nozzle is a model test device attached to the rear of the water-jet propulsion unit that changes the longitudinal jet direction of the water flow to the lateral direction.The device only generates force on the internal flow passage of the ship hull,which not only reflects the influence of the suction effect of the propulsion device on the stern boundary layer under the self-propelled state of the ship model propelled by the conventional nozzle,but also has little influ-ence on the floating state of the shipbody.Only through the ship model resistance test and PIV test in the capture area,com-bined with the momentum flux method conversion,the influence of the propulsion system on the hull resistance in the con-ventional nozzle propulsion ship model self-propelled test can be separated.Through CFD method,the flow boundary condi-tion method is used to numerically simulate the resistance performance of a ship model with a T-shaped nozzle propulsion device,and compare with the model test results.Finally working principle of the T-shaped nozzle propulsion device is ex-plained.
维普
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