摘要
为研究涡轮反转鼓风损失的影响因素,掌握可倒车动力涡轮反转鼓风损失控制策略与控制方法,以某船用可倒车动力涡轮为例,建立了计算模型。在1.0工况下以正车涡轮额定转速n为基础,分别计算了0.6n,0.8n,1.0n和1.1n转速下可倒车动力涡轮产生的鼓风损失,并对比分析了4种转速下可倒车动力涡轮的性能及鼓风损失的变化。同时,对比研究了不同旋向倒车涡轮的内部流场,分析鼓风损失对流场参数的影响。研究表明:机组正车运行时,倒车涡轮会产生鼓风损失,导致倒车级内流场参数出现异常;出口压力高于进口压力时,动叶栅的温升现象和输出功率为负;1.1n转速下因鼓风产生的损失最高,功率损失的占比也最高;1.0n转速工况下的效率较1.1n转速工况低0.02%,但机组输出功率最高。
In order to study the reverse blast loss influencing factors of the turbine and master the control strategy and control method of reverse blast loss of reversible power turbine,a calculation model was es-tablished by taking a marine reversible power turbine as an example.Under the working condition of 1.O,based on the rated speed n of ahead turbine,the blast losses caused by the reversible power turbine at the speeds of 0.6n,0.8n,1.On and 1.1n were calculated respectively,and the performance of the reversi-ble power turbine and the change of the blast loss at four speeds were compared and analyzed.At the same time,the internal flow field of the reversible turbine with different rotating directions was compared and the influence of the blast loss on the flow field parameters was analyzed.The research shows that when the unit is running ahead,the reversible turbine will produce blast loss,resulting in abnormal flow field parameters in the astern stage;when the outlet pressure is higher than the inlet pressure,the temper-ature rise of the moving cascade and the output power are negative;at 1.In speed,the loss caused by blast is the highest,and the proportion of power loss is also the highest;the efficiency under 1.On speed condi-tion is 0.02%lower than that under 1.1n speed condition,but the output power of the unit is highest.
作者
蒋振宇
赵天笑
吴磊
高杰
JIANG Zhenyu;ZHAO Tianxiao;WU Lei;GAO Jie(College of Power and Energy Engineering,Harbin Engineering University,Harbin,China,150001)
出处
《热能动力工程》
CAS
CSCD
北大核心
2024年第5期42-49,共8页
Journal of Engineering for Thermal Energy and Power
基金
国家科技重大专项(J2019-Ⅱ-0018-0039)。
关键词
倒车涡轮
转速
鼓风损失
涡轮性能
温升
reversible turbine
rotating speed
blast loss
turbine characteristics
temperature rise
