You need JavaScript to view this

Measurement of turbulent flow fields in a agitated vessel with four baffles by laser-doppler velocimetry. Mean velocity fields and flow pattern; Buffle tsuki heiento kakuhan sonai nagare no LDV ni yoru keisoku. Heikin sokudoba to flow pattern

Journal Article:

Abstract

The three dimensional complex turbulent flow fields induced by a four flat blade paddle impeller in agitated vessel were measured by laser Doppler velocimetry. Mixing vessel used was a closed cylindrical tank of 490 mm diameter with a flat bottom and four vertical buffles, giving water volumes of about 1001. The impellers were at the midnight of the water level in the tank. A height of liquid (water) was equal to the vessel diameter. Three components of mean velocity were measured at three vertical sections {theta}=7.5deg, 45deg and 85deg, in several horizontal planes. Mixing Reynolds number NRe was 1.2 times 10{sup 5}. It can be found from the results that circumferential mean velocity profiles show the symmetrical shape in the upper and lower sides of impeller. Secondary velocity components, such as axial and radial velocities, however, were not in symmetry. For this reason, the ratio of circulation flow volume which enter in upper and lower sides of impeller was roughly 7/3. In both the middle and buffle regions, mean flow velocities (flow patterns) were different, dependent of three vertical planes with different circumferential angle measured from buffle. 10 refs., 8 figs., 1 tab.
Authors:
Suzukawa, K; [1]  hashimoto, T; [2]  Osaka, H [3] 
  1. Ube Industries, Ltd., Tokyo (Japan)
  2. Yamaguchi University, Yamaguchi (Japan)
  3. Yamaguchi University, Yamaguchi (Japan). Faclty of Engineering
Publication Date:
Dec 25, 1997
Product Type:
Journal Article
Reference Number:
SCA: 420400; 440800; PA: JP-98:0G0231; EDB-98:052842; SN: 98001948143
Resource Relation:
Journal Name: Nippon Kikai Gakkai Ronbunshu. B Hen (Transactions of the Japan Society of Mechanical Engineers. Part B); Journal Volume: 63; Journal Issue: 616; Other Information: PBD: 25 Dec 1997
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; 44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; CYLINDERS; BAFFLES; CLOSURES; STIRRING; TURBULENT FLOW; LASER DOPPLER ANEMOMETERS; VELOCITY; PATTERN RECOGNITION
OSTI ID:
594536
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Journal ID: NKGBDD; ISSN 0387-5016; TRN: JN98G0231
Submitting Site:
NEDO
Size:
pp. 99-106
Announcement Date:
Jun 03, 1998

Journal Article:

Citation Formats

Suzukawa, K, hashimoto, T, and Osaka, H. Measurement of turbulent flow fields in a agitated vessel with four baffles by laser-doppler velocimetry. Mean velocity fields and flow pattern; Buffle tsuki heiento kakuhan sonai nagare no LDV ni yoru keisoku. Heikin sokudoba to flow pattern. Japan: N. p., 1997. Web.
Suzukawa, K, hashimoto, T, & Osaka, H. Measurement of turbulent flow fields in a agitated vessel with four baffles by laser-doppler velocimetry. Mean velocity fields and flow pattern; Buffle tsuki heiento kakuhan sonai nagare no LDV ni yoru keisoku. Heikin sokudoba to flow pattern. Japan.
Suzukawa, K, hashimoto, T, and Osaka, H. 1997. "Measurement of turbulent flow fields in a agitated vessel with four baffles by laser-doppler velocimetry. Mean velocity fields and flow pattern; Buffle tsuki heiento kakuhan sonai nagare no LDV ni yoru keisoku. Heikin sokudoba to flow pattern." Japan.
@misc{etde_594536,
title = {Measurement of turbulent flow fields in a agitated vessel with four baffles by laser-doppler velocimetry. Mean velocity fields and flow pattern; Buffle tsuki heiento kakuhan sonai nagare no LDV ni yoru keisoku. Heikin sokudoba to flow pattern}
author = {Suzukawa, K, hashimoto, T, and Osaka, H}
abstractNote = {The three dimensional complex turbulent flow fields induced by a four flat blade paddle impeller in agitated vessel were measured by laser Doppler velocimetry. Mixing vessel used was a closed cylindrical tank of 490 mm diameter with a flat bottom and four vertical buffles, giving water volumes of about 1001. The impellers were at the midnight of the water level in the tank. A height of liquid (water) was equal to the vessel diameter. Three components of mean velocity were measured at three vertical sections {theta}=7.5deg, 45deg and 85deg, in several horizontal planes. Mixing Reynolds number NRe was 1.2 times 10{sup 5}. It can be found from the results that circumferential mean velocity profiles show the symmetrical shape in the upper and lower sides of impeller. Secondary velocity components, such as axial and radial velocities, however, were not in symmetry. For this reason, the ratio of circulation flow volume which enter in upper and lower sides of impeller was roughly 7/3. In both the middle and buffle regions, mean flow velocities (flow patterns) were different, dependent of three vertical planes with different circumferential angle measured from buffle. 10 refs., 8 figs., 1 tab.}
journal = {Nippon Kikai Gakkai Ronbunshu. B Hen (Transactions of the Japan Society of Mechanical Engineers. Part B)}
issue = {616}
volume = {63}
journal type = {AC}
place = {Japan}
year = {1997}
month = {Dec}
}