船用燃气轮机性能元件蠕变寿命的有限元分析  

Finite Element Analysis of Performance Elements′ Creep Life of PSR for Marine Gas Turbines

作　　者：刘振宇[1] 程惠尔[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200030

出　　处：《中国造船》2007年第4期64-70,共7页Shipbuilding of China

基　　金：海装十五预先研究项目(No.40101001)

摘　　要：以材料蠕变开裂为判别依据,利用有限元方法和拉森-米勒方程及迈纳损伤累计理论,分析了一次表面回热器(PSR)性能元件的高温蠕变规律,以研究这种构思独特的波纹状薄板蠕变寿命的评估方法。发现PSR性能元件蠕变最恶劣的位置在相邻小波纹压力通道的上下波纹板片接触点附近。分析PSR的板片元件尺寸δ,两侧压差ΔP及工作温度Tm对其蠕变寿命的影响,给出了各种压力和温度载荷下不同厚度304号不锈钢传热元件的蠕变寿命τR,以及基于工作寿命为105h的元件最小设计厚度mδin。研究结果对船用间冷回热循环燃气轮机系统中PSR的结构设计和其工作寿命评估具有参考价值。Creep behavior analysis of primary surface recuperator＇s performance element at high temperature is given on the basis of finite element method. The maximum creep stress and strain locate near the point where the top plate of the small channel touches the bottom one. The method of estimating creep rupture life of the performance elements is proposed based on Larson-Miller parametric methods and Miner＇s rule. The affect of the plate thickness, pressure difference at two sides, plate temperature on the performance element＇s creep life is analysised. The creep life of 304 stainless steel performance elements with different thickness is given. The minimum design thickness of element based on creep life of 10ah is presented.

关 键 词：船舶 舰船工程 船用燃气轮机 一次表面回热器 蠕变寿命 

分 类 号：TK472[动力工程及工程热物理—动力机械及工程]