Effectiveness of process for rational enhancement of convective heat transfer in ducts with discrete turbulizers

Аuthors

Vasilyev V. Y.

Astrakhan State Technical University,

e-mail: vasilievv@mail.ru

Abstract

Way of artificial turbulization in wall layer of currents on diffuser-confusor sites is realized in rectangular tubular-plate ducts with cross ridges and grooves (TPrg) of heat transfer surf aces (HTS). The results of experimental researches on heat aerodynamic characteristics of TPrg HTS have confermed the realization of process for rational enhancement ofconvective heat transfer (REHT)

and high level of estimations at value (Nu/Nu )' of a determining complex [(Nu/Nu_ra)/( С / С _гл)] R_e=idem ⁼ 1 • F°^r the first time it was offered and realized the technique of definition and tracing of continuous change of values of an estimation (Nu/Nu )'

for investigated groups TPrg HTS, the basic geometrical dimentionless and regime parameters is realized within the limits of all area for realization of REHT process, simplifying the search of rational decisions and designing of heat transfers. 

Keywords:

tubular-plate, discrete turbulizer, ridges and grooves, generation of vortex, rational enhancement ofconvective heat transfer