Transient Nature of Argon and Molecular Gas-Seeded Argon Inductive Thermal Plasmas in Pulse Amplitude Modulation Approach
Transient Nature of Argon and Molecular Gas-Seeded Argon Inductive Thermal Plasmas in Pulse Amplitude Modulation Approach
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脉冲幅度调制方法中氩和分子气体氩感应热等离子体的瞬态性质
DOI：
10.1541/ieejpes.123.1333
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
T. Sakuta
中科院分区：
文献类型：
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作者：
M. M. Hossain;Yasunori Tanaka;M. Katayama;T. Sakuta
本文以Ar、Ar-CO_2、Ar-N_2和Ar-O_2为工作气体（100 lpm氩气和2.5lpm分子气体），采用脉冲幅度调制法对大功率（30 kW）大气压感应热等离子体进行了理论和实验诊断。模拟已经进行了使用二维局部热力学平衡（LTE）代码相同的火炬和操作条件的实验。从ArI在751 nm处的模拟和实验时间辐射强度计算所谓的响应时间，对闪烁电流水平（SCL），即电流脉冲的高低电平之比，在40%-100%范围内进行了严格而全面的比较讨论。还将测量的温度与计算的表观温度进行比较。尽管实验和模拟等离子体的响应时间的大小存在一定的差异（在较低的SCL），在脉冲过渡的瞬间，已经观察到类似的趋势。这些结果有助于加深对有关气体瞬态特性和平衡现象的理解。
In the present work, a high power (30kW), atmospheric pressure inductive thermal plasma has been diagnosed both theoretically and experimentally in pulse amplitude modulation approach with Ar, Ar-CO2, Ar-N2, and Ar-O2 as working gases (100lpm argon and 2.5lpm molecular gas). Simulation has been carried out using a two-dimensional local thermodynamic equilibrium (LTE) code for the same torch and operating conditions as that of experiment. Calculating the so-called response times from both simulated and experimental temporal radiation intensity of ArI at 751nm, a rigorous and comprehensive comparative discussion has been made for a shimmer current level (SCL), the ratio of lower to higher level of current pulse, varying from 40%—100%. The measured temperature is also compared with the calculated apparent temperature. In spite of some discrepancies (at lower SCL) with the magnitude of response times of experimental and simulated plasma at the instant of on-pulsing transition, similar trend of those have been observed. These results will help to clear the understanding of transient performance of the concerned gases and equilibrium phenomena.