Photographic Study of Bubble Size and Void Fraction Distributions in a Gas–Liquid Stirred Tank with Hollow Blade Turbine
スポンサーリンク
概要
- 論文の詳細を見る
The distributions of local Sauter mean bubble size, gas void fraction, and interfacial area in a standard stirred tank equipped with a half elliptical blade disk turbine (HEDT) have been investigated at different gas flow rates using photography techniques. In the identification of bubble size, the liquid phase is dyed with fluorescent rhodamine to make the gas–liquid interfaces clearly visible under a laser sheet. An image processing algorithm is used to analyze the bubbles interface, and the algorithm's reliability has been validated by comparing with manual counting method. The image accuracy is about 0.05 mm, and the minimum identifiable bubble is 0.45 mm. The investigation of the distributions of void fraction is based on a "depth field" method through a calibration experiment. Results show that the local void fraction and interfacial area distributions are similar, and the maximum values are located below the impeller. The tank-averaged Sauter bubble size increases slightly with increasing ventilation, and the increase in void fraction with increasing ventilation is nearly in the same proportions.
著者
-
Gao Zhengming
State Key Lab. Of Chemical Resource Engineering Beijing Univ. Of Chemical Technol.
-
Bao Yuyun
State Key Lab. Of Chemical Resource Engineering Beijing Univ. Of Chemical Technol.
-
Bao Yuyun
State Key Laboratory of Chemical Resource Engineering, School of Chemical Engineering, Beijing University of Chemical Technology
-
Geng Xuan
State Key Laboratory of Chemical Resource Engineering, School of Chemical Engineering, Beijing University of Chemical Technology
-
Gao Zhengming
State Key Laboratory of Chemical Resource Engineering, School of Chemical Engineering, Beijing University of Chemical Technology
関連論文
- Power Demand and Mixing Performance of Coaxial Mixers in Non-Newtonian Fluids
- Effect of Temperature and Suspended Solids on Local Void Fraction in a Sparged Reactor with a Multi-Impeller Agitator
- Particle Image Velocimetry Study of Flow Patterns and Mixing Characteristics in Multiple Impeller Stirred Tank
- Photographic Study of Bubble Size and Void Fraction Distributions in a Gas–Liquid Stirred Tank with Hollow Blade Turbine
- Micromixing Efficiency in an Asymmetric Confined Impinging Jet Reactor
- Micromixing Characteristics in the Impeller Discharging Area in Aerated Stirred Tank