弹道学报2026，Vol.38Issue(2)：71-84,14.DOI:10.12115/ddxb.2026.04009
水下涡轮机动力系统大深度启动特性及控制策略研究
Starting Characteristics and Control Strategies of Underwater Turbine Power Systems at Great Depths
摘要
Abstract
The open-cycle underwater turbine power system offers advantages such as high power potential,low vibration and noise,and high efficiency during high-power operation conditions.Therefore,it is a preferred propulsion solution for high-speed underwater vehicles.However,this type of engine is extremely sensitive to variations in operating conditions,particularly fluctuations in backpressure,resulting in technical challenges such as difficulty of deep-depth startup.To address this issue,a CFD-based simulation model was established for the startup process of the underwater turbine power system in this paper.The startup characteristics at various depths were investigated.The evolution patterns of system parameters and the failure mechanisms during deep-depth transient startup were revealed.In addition,a bi-variable control strategy,simultaneously regulating fuel pump displacement and the number of active nozzles was explored.Its effect on the deep-depth startup characteristics was analyzed.The results show that,compared with the design condition,the available isentropic enthalpy drop of the working gas decreases significantly during deep-depth startup.At a water depth of 600 m,the turbine speed drops by 77.6％when grain burns out.The propellant supply is insufficient,making the system prone to startup failure induced by a sudden decrease in gas generation.Reducing the number of active nozzles lowers the working fluid mass flow rate by 42.2％during the early startup,which effectively accelerates the pressure rise rate in the combustion chamber.However,it also reduces the system flow area,and together with efficiency fluctuations caused by variations in partial admission,ultimately limits the steady state output torque of the turbine.By dynamically adjusting the number of active nozzles,the deep-depth startup characteristics are further improved,resulting in a 126.4％increase in steady-state output torque.The findings of this study provide a valuable reference for the optimization of the deep-depth startup control strategy and the engineering application of turbine power systems.关键词
开式循环/水下涡轮机/大深度启动/燃料泵排量/喷管数目Key words
open-cycle/underwater turbine power system/startup process at great depth/fuel pump displacement/number of nozzle分类
军事科技引用本文复制引用
谢添立,李代金,秦侃,罗凯,党建军..水下涡轮机动力系统大深度启动特性及控制策略研究[J].弹道学报,2026,38(2):71-84,14.基金项目
国家自然科学基金面上项目(52571370) （52571370）
