Theoretical and experimental investigation on transient regime of fiber laser 光纤激光器时域瞬态特性的理论与实验研究
Intra-cavity fiber sensor for measuring gas concentration based on laser ′ s transient regime 基于激光瞬态特性的内腔气体浓度光纤传感器
The experiments on the characteristics of gas flowrate transient within slug flow regime were carried out using a horizontal pipeline of 378 m in length and 80 mm in diameter, taking air-water mixture as media. 为了寻求混输管线气量瞬变过程压力、压差的变化规律,在长378m、内径80mm的水平不锈钢试验环道上利用空气和水进行了段塞流气量瞬变试验。
Cyclic pulse injection may cause the transient pressure regime in the reservoir and remaining pressure in a thin aquifer. 周期性脉冲式注水可以在地层中造成不稳定压力状态,在薄含水层中造成剩余压力。
Between the laminar and turbulent jet regimes, there exists an unstable transient regime, in which the mean jet length decreases with increasing gas flow rate but increases with increasing arc current. 在层流与湍流等离子体射流工况之间,存在一个流动状况不稳定的过渡区,此时等离子体射流的平均长度随气流量的加大而减小,但随弧电流的加大而明显加大。
In transient regime, because the density fluctuation is inconsistent with the temperature change, the ESTR with nanosecond pulses irradiance will be overrated greatly by using the quasi-steady thermal approximation method. 在瞬态情况下,密度起伏还没有和温度变化达到一致,此时用准稳态热近似的方法将大大高估纳秒时域激光脉冲作用下的激发态热折射。