2024-03-28T23:03:06Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00007627
2023-01-16T03:53:06Z
320:321:322
A Study on Highly Turbulent Premixed Flames in a Cyclone-Jet Combustor (2nd Report, Investigation on Flame Microstructure with an Electrostatic Probe)
旋回噴流燃焼器を用いた強乱流予混合火炎の研究 (第2報, 静電探針を用いた火炎の微細構造の検討)
山本, 和弘
21537
YAMAMOTO, Kazuhiro
21538
阿知波, 朝士
21539
ACHIHA, Tomoshi
21540
小沼, 義昭
21541
ONUMA, Yoshiaki
21542
Premixed Combustion
Turbulent Combustion
Flame
Turbulence
Electrostatic Probe
To examine flame structure in turbulent flow, we have established highly turbulent flames of a propane-air mixture in a cyclone-jet combustor, and have measured ion current by an electrostatic probe. Based on the measured flow field by a hot wire anemometer, we have obtained turbulence characteristics in the non-reacting flow, and have plotted them on the Peter's phase-diagram to classify the micro-structure of turbulent flames. From the ion current characteristics and tomographic images of flames, we have discussed the flame structure and turbulence. Results show that, as the exit velocity is relatively low, a wrinkled laminar flame is formed. As the exit velocity is further increased, the flame wrinkling is intensified to increase the fluctuation in wave of ion current. When the velocity exceeds 30m/s, the PDF of ion current is no longer that of a wrinkled laminar flame, which shows that, with turbulence, one continuous flame sheet cannot be sustained, and the destruction of laminar flame structure occurs, in which small reacting eddies in an intermediate stage of combustion are embedded. It appears that the flame structure changes from the wrinkled laminar flame to those with distribution reaction zone.
journal article
日本機械学会
2000-02-25
application/pdf
日本機械学會論文集 B編
642
66
585
590
http://hdl.handle.net/2237/9341
0387-5016
https://nagoya.repo.nii.ac.jp/record/7627/files/JsMecEngB_66-642-585.pdf
jpn
http://ci.nii.ac.jp/naid/110002392844
本文データは学協会の許諾に基づきCiNiiから複製したものである。
日本機械学会