CAJ | 학술논문

锅炉集箱系统设计结构的多样性,使得其中受热并联管组内流体的流动特性也趋于复杂化。确保并联管组内的流体具有良好的流动特性是集箱系统安全运行的保证。通过创建一种集箱系统的水动力特性分析模型,研究热负荷分布不均匀性对并联管组流量分配不均匀性的影响,并对其变化关系式进行了理论推导,同时给出分析实例。分析结果表明：在单相状态或摩擦阻力校正系数可视为常数的汽水两相状态下,集箱系统内各并联管的分配流量与其平均密度间总体上呈二次函数变化关系,且单相水和两相状态下并联管的分配流量随其热负荷的增加而增加,单相蒸汽状态下并联管的分配流量随其热负荷的增加而减小。
과로집상계통설계결구적다양성,사득기중수열병련관조내류체적류동특성야추우복잡화。학보병련관조내적류체구유량호적류동특성시집상계통안전운행적보증。통과창건일충집상계통적수동력특성분석모형,연구열부하분포불균균성대병련관조류량분배불균균성적영향,병대기변화관계식진행료이론추도,동시급출분석실례。분석결과표명：재단상상태혹마찰조력교정계수가시위상수적기수량상상태하,집상계통내각병련관적분배류량여기평균밀도간총체상정이차함수변화관계,차단상수화량상상태하병련관적분배류량수기열부하적증가이증가,단상증기상태하병련관적분배류량수기열부하적증가이감소。
The flow characteristics of the manifold tended to more complicated since the design structure of header system becoming diversification.To ensure the header system being in safe operation,the manifold need to be having good flow characteristics.The effect from the uneven distribution of heat load to the uneven flow distribution of the manifold and derived the relationship between the heat load and the uneven distribution flow was studied.Meantime,an example was given for verification and analysis.The results show that the distribution flow of the manifold in header system is quadratic with the average density in the single-phase state and in the two-phase state when the friction loss correction factor is constant.The result also shows that the distribution flow of the parallel tubes increases with the increasing of the heat load in the liquid state and in the two-phase state,but decreases with the increasing of the heat load in the steam state.