2022-05-24T02:15:32Zhttps://nagoya.repo.nii.ac.jp/oaioai:nagoya.repo.nii.ac.jp:000076432021-03-01T12:17:25Z旋回噴流燃焼器を用いた強乱流予混合火炎の研究 (第3報, Slot-Correlation法による燃焼場の乱れスケールの計測)A Study on Highly Turbulent Premixed Flames in a Cyclone-Jet Combustor (3rd Report, Measurement of Turbulence Scale in Combustion Field by Slot-Correlation Method)山本, 和弘YAMAMOTO, Kazuhiro西澤, 泰樹NISHIZAWA, Yasuki小沼, 義昭ONUMA, Yoshiaki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Premixed CombustionTurbulenceLDVFlow MeasurementsSlot-Correlation MethodPremixed flames in highly turbulent flow have been investigated by a cyclone-jet combustor. The velocity field has been measured using LDV (laser-doppler velocimeter) to analyze the experimental conditions on the combustion diagram. Especially, the requirement for determination of turbulence scale has been examined. In conventional data-sampling, the interpolated velocity data does include errors so that the auto-correlation coefficient is higher, resulting in the larger integral time scale of turbulence. Slot-Correlation method is useful to examine the velocity fluctuation based on randomly sampled data by LDV. For determining integral time scale, the data number of the order of 10^5 is needed within 10％ error. The flow field is changed by combustion and the turbulence is reduced, with the turbulence scale smaller. On the combustion diagram, the condition of Um < 15 m/s belongs to the flamelet regime, and that of Um > 20 m/s belongs to the distributed reaction zone regime.日本機械学会2002-02-25jpnjournal articlehttp://hdl.handle.net/2237/9348https://nagoya.repo.nii.ac.jp/records/7643http://ci.nii.ac.jp/naid/1100023869580387-5016日本機械学會論文集 B編68666603609https://nagoya.repo.nii.ac.jp/record/7643/files/JsMecEngB_68-666-603.pdfapplication/pdf573.0 kB2018-02-19