The crack propagation rate of pipes is mainly dependent on FATT of Steels of pipes (fracture appearance transition temperature). And FATT can be measured by drop weighted tear tests.
管道裂纹的扩展速度主要取决于管道钢的转变温度FATT。FATT可由落锤撕裂试验测定。
The heat recovery rate, optimal switching time and pressure drop of honeycomb regenerator used in the high temperature air combustion system were investigated.
实验研究了高温空气燃烧系统使用的蜂巢蓄热体热回收率、最佳换向时间、流动阻力等性能参数及其随几何尺寸的变化规律；
Test results show that, the maximum of EGR rate is 15.4%; Compared with original data, the maximum of in-cylinder pressure and average temperature all drop a little.
试验结果表明，在各负荷下EGR率最大值为15.4%：燃烧过程缸内压力的最大值和缸内平均温度的最高值均有所降低；
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