@article{oai:kanazawa-u.repo.nii.ac.jp:00009197, author = {Tanaka, Yasunori and Sakuta, Tadahiro and Shibuya, Masatoyo and 田中, 康規 and 作田, 裕 and 渋谷, 正豊}, issue = {1}, journal = {IEEJ Transactions on Power and Energy = 電気学会論文誌B(電力・エネルギー部門誌)}, month = {Jan}, note = {The present paper describes a prediction method of the dielectric strength of the air in gas temperature range of 300–3500 K. First, the equilibrium composition of the air at gas temperatures of 300–3500 K was calculated through Saha and Guldburg-Waage equations. Secondly, the electron energy distribution function (EEDF) was calculated by an adoption of the two-term expansion of Boltzmann equation. Finally, the effective ionization coefficient ᾱ was derived from the EEDF obtained. The critical reduced electric field strength (E/N)cr, which gives zero effective ionization coefficient ᾱ= 0, was obtained at gas temperatures of 300–3500 K. The result indicates that (E/N)cr decreases as the gas temperature increases from 1500 K to 3500 K, which is due mainly to an increase in the mole fraction of NO molecule which has a much lower ionization potential compared with N2 and O2. This calculated result fairly agrees with an experimental one. © 2004, The Institute of Electrical Engineers of Japan. All rights reserved., 出版者照会後に全文公開}, pages = {162--168}, title = {ガス温度300-3500Kにおける空気の実効電離係数と臨界電界の数値解析的検討}, volume = {124}, year = {2004} }