摘要
[目的]旨在研究船用蒸汽蓄能器充能过程的非平衡态热力特性。[方法]结合船用蒸汽蓄能器的运行条件,分析船用蒸汽蓄能器充能过程的非平衡态热力规律,获得压力、温度、湍流动能、充水系数等关键参数的热力不平衡态特征,并基于非平衡芯热力学理论揭示蒸汽蓄能器充能过程中热力非平衡态机理。[结果]结果表明:在充能过程中,受蒸汽蓄能器内汽、液的相变弛豫效应和热惯性影响,蒸汽蓄能器会表现出强烈的非平衡热力过程,促使蓄能器内温度响应滞后于压力响应,并导致湍流动能及湍流耗散率产生流动转捩。[结论]研究成果可为实船蒸汽蓄能器充能过程的优化设计提供参考。
[Objectives]Thermodynamic nonequilibrium characteristics of marine steam accumulator during the process of energy charge is studied in this paper.[Methods]According to operating conditions of a marine steam accumulator,the thermodynamic nonequilibrium law of marine steam accumulator during the process of energy charge is analyzed.Key parameters of the thermodynamic nonequilibrium characteristics such as pressure,temperature,turbulent kinetic energy and water filling coefficient are obtained.The mechanism of thermodynamic nonequilibrium in steam accumulator energy charge process is revealed based on the theory of nonequilibrium thermodynamics.[Results]The results of the study show that steam accumulator shows a significant thermodynamic nonequilibrium process during the energy charge,which is caused by phase change relaxation and thermal inertia effect of steam and water in steam accumulator.Meanwhile,the temperature response in the accumulator lagged behind the pressure response and flow transitions of turbulent kinetic energy and turbulent dissipation rate are occurred.[Conclusions]Therefore,these research results can provide reference for the optimization design of energy charge process of the actual marine steam accumulator.
作者
杨元龙
Yang Yuanlong(China Ship Development and Design Center,Wuhan 430064,China)
出处
《中国舰船研究》
CSCD
北大核心
2019年第S01期23-27,40,共6页
Chinese Journal of Ship Research
基金
国家自然科学基金资助项目(51709249)
关键词
蒸汽蓄能器
充能过程
非平衡态热力性能
steam accumulator
energy charge
thermodynamic nonequilibrium performance
