hiTRAN® Wire Matrix Inserts in Fouling Applications

Autor: P. Droegemueller, M. J. H. Simmons, J. M. Ritchie
Rok vydání: 2009
Předmět:
Zdroj: Heat Transfer Engineering. 30:876-884
ISSN: 1521-0537
0145-7632
Popis: Fouling characteristics are dictated largely by the properties of the thermal and hydrodynamic boundary layers. As a result, fouling mitigation strategies must take into account the conditions in this region. hiTRAN wire matrix tube inserts are a useful tool in altering the conditions near the tube wall, especially in the laminar and transition flow regions. This review article considers particle image velocimetry and laser doppler velocimetry measurements, which were employed in order to show the hydrodynamic differences between plain tubes and those containing inserts. Measurements indicate that the wall shear rate in tubes containing hiTRAN inserts operating in the laminar flow regime is similar to that for plain bore tubes operating in the turbulent flow regime. Moreover, the increased tube-side heat transfer coefficient that results from the reduction of the thermal boundary layer allows operation with smaller Effective Mean Temperature Differences (EMTDs). This enables the designer to reduce the tub...
Databáze: OpenAIRE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje