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.