CAJ | 학술논문

船用蒸汽蓄热器的充汽过程是复杂剧烈的汽液两相热质交换过程，具有瞬时充汽量极大、热负荷波动剧烈的特点，其充汽特性直接关系到舰船蒸汽动力系统的运行稳定性。根据船用蒸汽蓄热器的运行条件，采用考虑汽液两相蒸发与冷凝的两流体模型和热相变模型，进行不同初始水位和压力下船用蒸汽蓄热器充汽过程动态特性的数值研究。计算结果表明：在充汽流量一定的条件下，蒸汽蓄热器初始水位越高，导致蓄热器压力越小、蒸汽温度越低；蒸汽蓄热器初始压力越大，造成蓄热器压力越大、蒸汽温度越高；在充汽起始阶段，蒸汽蓄热器初始压力越大，蓄热器水位和压力波动越剧烈。
선용증기축열기적충기과정시복잡극렬적기액량상열질교환과정，구유순시충기량겁대、열부하파동극렬적특점，기충기특성직접관계도함선증기동력계통적운행은정성。근거선용증기축열기적운행조건，채용고필기액량상증발여냉응적량류체모형화열상변모형，진행불동초시수위화압력하선용증기축열기충기과정동태특성적수치연구。계산결과표명：재충기류량일정적조건하，증기축열기초시수위월고，도치축열기압력월소、증기온도월저；증기축열기초시압력월대，조성축열기압력월대、증기온도월고；재충기기시계단，증기축열기초시압력월대，축열기수위화압력파동월극렬。
The charging process of marine steam accumulators is associated with vapor-water two-phase energy and mass transfer, which has the characteristics of instantaneous steam consuming and powerful thermal load fluctuation, and its charging steam performance directly determines the stability of ship steam power systems. Based on the actual operating conditions, a two-fluid model and a thermal change model with considerations of evaporation and condensation for vapor and liquid two phases are established. Nu-merical study on the dynamic characteristics of the charging process for marine steam accumulators under different initial pressure and water level is carried out. The calculated results show that a high initial water level during the charging process in a steam accumulator would lead to low pressure and steam temperature at the case of charging steam with constant mass flow. Meanwhile, a higher initial pressure would cause higher pressure and steam temperature. Finally, at the beginning of charging process, higher initial pres-sure may result in more dramatic fluctuation for water levels and pressure within a steam accumulator.