穿透裂纹临界泄漏率分析程序的研制与验证

建立考虑裂纹形态参数影响的周向穿透裂纹临界泄漏率的计算模型,以此为基础编制计算程序PC-Leakflow2。介绍程序的计算流程及求解方法,对影响裂纹临界泄漏率的各个输入参数进行敏感性分析,用文献中的临界泄漏率试验数据对PC-Leakflow2程序的计算结果进行验证。用PC-Leakflow2程序和经典的临界流模型对相同的例题进行计算,计算结果表明:临界泄漏率的大小受裂纹形态参数的影响较强;经典的临界流模型会显著地高估紧密裂纹的临界泄漏率。

Development and Verification of Critical Leakage-Rate Analysis Program for Through-Wall Cracks

The calculation models and PC-Leakflow2 program,which give careful considerations to the effect of the crack-morphology parameters,are developed for evaluating the critical leakage-rate squirted from a circumferential through-wall crack(TWC).The calculation flow diagrams and the solving method of PC-Leakflow2 program are described.The sensitivity analyses are conducted for each input parameter having an effect on the critical leakage-rate.PC-Leakflow2 program is validated by comparing the calculation results with the relevant critical leakage-rate experimental data given in the references.The calculation results pro-duced by PC-Leakflow2 program and the classic critical-flow models for the same benchmark problem indi-cate that the magnitude of the critical leakage-rate is strongly influenced by the crack-morphology parameters.The classic critical-flow models significantly over estimate the critical leakage-rate of a compact TWC.