Li/SF6闭式循环热动力系统浸没喷射式燃烧反应剧烈，必须精确控制SF6供给流量才能保证系统安全稳定地工作。为此，设计和搭建了SF6氧化剂供给调节系统，试验研究了稳态和动态工况下SF6供给流量和系统组件参数的变化规律。试验结果表明，稳态工况下SF6供给压力与温度的波动幅值分别在0.2 bar和0.2 ℃以内，表明两级压力PID控制和两级温度PID控制可实现SF6供给流量精确调节；动态工况下单级压力阶跃时系统可迅速调节供给压力并将波动幅值控制在0.2 bar以内，而两级压力同时阶跃时系统调节时间延长，供给压力波动幅值在0.2 bar以内，表明系统可实现SF6氧化剂供给流量动态精确调节。研究成果为SF6氧化剂供给调节提供了新方案，有助于鱼雷Li/SF6闭式循环热动力系统研制。
The combustion reaction of the Li/SF6 closed-cycle thermodynamic system with submerged injection is intense, and the SF6 supply flow rate must be precisely controlled to ensure the safe and stable operation of the system. For this purpose, an SF6 oxidant supply regulation system was designed and built, and the variation laws of the SF6 supply flow rate and system component parameters under steady-state and dynamic conditions were experimentally studied. The experimental results show that the fluctuation amplitudes of the SF6 supply pressure and temperature under steady-state conditions are within 0.2 bar and 0.2 °C respectively, indicating that the two-stage pressure PID control and two-stage temperature PID control can achieve precise regulation of the SF6 supply flow rate. Under dynamic conditions, when a single-stage pressure step occurs, the system can quickly adjust the supply pressure and control the fluctuation amplitude within 0.2 bar, while when two-stage pressures step simultaneously, the system's adjustment time is prolonged, but the supply pressure fluctuation amplitude is still within 0.2 bar, indicating that the system can achieve dynamic precise regulation of the SF6 oxidant supply flow rate. The research results provide a new solution for the regulation of SF6 oxidant supply and are helpful for the development of the Li/SF6 closed-cycle thermodynamic system for torpedoes.
2026,48(2): 84-88 收稿日期：2025-4-17
DOI：10.3404/j.issn.1672-7649.2026.02.014
分类号：U66；TJ630
基金项目：国防科工局船舶动力基础科研计划项目（259018）；浙江省“尖兵领雁+X”研发攻关计划项目（2024C01258）
作者简介：张国威(2000-),男,硕士研究生,研究方向为流量计量
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