Abo Bibliothek: Guest

ISSN Online: 2377-424X

ISBN CD: 1-56700-226-9

ISBN Online: 1-56700-225-0

International Heat Transfer Conference 13
August, 13-18, 2006, Sydney, Australia

EXPERIMENTAL INVESTIGATION OF THERMAL-HYDRAULIC CHARACTERISTICS AT A MIXING TEE

Get access (open in a dialog) DOI: 10.1615/IHTC13.p20.170
9 pages

Abstrakt

Analysis of striping phenomenon and thermal fatigue in a non-isothermal mixing area is one of the important issues to increase the operation time and safety of system with a low risk. This research investigates some of detailed mixing characteristics by close up visualization of the flow-field with PIV technique and measurement of the temperature fluctuation with a thermocouple network in a T-junction area. The temperature and velocity data show that a velocity ratio could be an important parameter for classification of the fluid mixing as well as the main velocity. The behaviour of a branch jet is categorized into different patterns based on the characteristics of velocity and temperature fluctuations near the wall. Basically each group is divided to three regions that are low velocity, jet and transfer regions. By interaction of these regions together, a remarkable area is existed such as a re-attached area with high radial velocity variation although this variation becomes lower if the pressure of low velocity area and initial part of the jet are decreasing.