MHD power generation with fully ionized seed
MHD power generation with fully ionized seed
复制标题
采用完全电离种子的 MHD 发电
DOI：
10.2514/3.47944
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发表时间：
1977
影响因子：
--
通讯作者：
S. Shioda
中科院分区：
文献类型：
--
作者：
H. Yamasaki;S. Shioda
在完全电离的种子政权的功率密度的恢复已被证明实验使用的MHD磁盘发生器的有效霍尔参数高达5.0时，种子被完全电离。实验在以下条件下用冲击加热和钾籽晶氩等离子体进行：停滞气体压力= 0.92大气压，停滞气体温度= 2750 K，流动马赫数= 2.5，和籽晶分数= 1.4 × 10 - 5。电子数密度的测量和钾、氩谱线的光谱观测证实，功率输出的恢复是由于电离不稳定性的降低。这一事实表明，利用非等离子体电离的盘发生器的成功操作似乎是可能的，并且电离不稳定性的抑制也可以提供更高的绝热效率。此外，较低的种子分数提供了与种子问题相关的技术优势。
Recovery of power density in the regime of fully ionized seed has been demonstrated experimentally using an MHD disk generator with the effective Hall parameter up to 5.0 when the seed was fully ionized. The experiments were conducted with a shock-heated and potassium-seeded argon plasma under the following conditions: stagnation gas pressure = 0.92 atm, stagnation gas temperature = 2750 K, flow Mach number = 2.5, and seed fraction = 1.4x 10 ~ 5. Measurements of electron-numb er density and spectroscopic observations of both potassium and argon lines confirmed that the recovery of power output was due to the reduction of ionization instability. This fact indicates that the successful operation of a disk generator utilizing nonequlibrium ionization seems to be possible and that the suppression of ionization instability can also provide higher adiabatic efficiency. Furthermore, the lower seed fraction offers technological advantages related to seed problems.