D242 Huels型アークヒータの澱み点付近におけるプラズマ気流の分光計測(D-24 高エンタルピー流(2),一般講演)

概要

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Flow near the stagnation point is spectroscopically measured to obtain the vibrational and rotational temperature in arc heated flow of pure Nitrogen. Arc heated experiments were conducted by using the Huels type arc heater. The B^2Σ_u^+-X^2Σ_g^+ transition of Δυ=0 of the N_2^+ molecule, is referred in the N_2^+ 1st negative band system. Spectra profiles in arc heated flow are obtained to estimate the vibrational temperature from the N_2^+ 1st negative band system at upstream of the sonic throat. The vibrational temperatures T_υ are estimated to be about 3000〜4000K from average inclination line close to (0,0)-(2,2) from the N_2^+(1st neg.). The rotational temperatures in an arc heated flow are obtained from the N_2^+(1st neg.) bands, (0,0) and (1,1) of Δυ=0. The rotational temperatures T_γ are estimated to be about 1600〜1900K from 2<J'<24, and about 5400〜6400K from 6<J'<42 of the rotational quantum number.
日本流体力学会の論文
2004-08-09