汽力装置回汽制动工况下螺旋桨变工况工作过程分析

针对蒸汽动力船舶回汽制动工况下螺旋桨转速经历了0转速状态,而采用传统的螺旋桨模型无法研究该状态的问题,通过对回汽制动工况中螺旋桨的典型动作过程进行分析,建立回汽制动工况中螺旋桨的变工况数学模型。基于Matlab-Simulink环境建立仿真模型,分析回汽制动工况下螺旋桨的动态运行状况,为回汽制动过程下螺旋桨的运行管理提供借鉴。仿真结果表明:在相同的航速下,倒车汽轮机回汽量越大,处于水轮机状态的螺旋桨所能达到的转速就越低;当对全速倒车的耗汽量实施回汽制动时,可以将96.8%最大航速以下的螺旋桨锁制。

Working Process Analysis of the Variable Conditions of Propellers in Back-steam Braking Conditions for Steam-powered Ships

For the defect that propeller revolution going through 0 status, while traditional propeller model cannot study the status of revolution closely to 0, mathematical model of variable conditions for propellers in Back-steam Braking conditions for Steam-Powered Ships was created, through the analysis of typical action course of the propellers. Also, this simulation models were created based on the Matlab-Simulink. Then dynamic running state of propellers can provide reference to the operational guidance of propellers. It was indicated in the simulation results that revolution will be lower while propeller in the hydro turbine state if back-steam flow was larger in the same ship speed. And the propellers below the 96.8% maximum speed can be locked in the maximum back-steam consumption.