Entropy Generation Study of Turbine Exhaust Gas Through an Infrared Suppression Device

Abstract

The present study involves analyzing entropy generation on an infrared suppression system for ocean liners. The governing differential equations (Navier–Stokes equation, energy equation) and the turbulence equations are solved using ANSYS Fluent 15.0. The relevant parameters, viz., Reynolds number at nozzle inlet ( to ), the temperature of nozzle inlet fluid (423 to 723 K), and the number of funnels (3 to 5), are varied. The effect of nozzle exhaust fluid temperature and funnel numbers is mainly studied in various quantities like heat transfer, entropy generation, and irreversibility caused by heat transfer and fluid friction. It is found that high-temperature exhaust fluid gives a higher value of entropy production. Moreover, entropy production because of heat transfer has the main contribution in total entropy production rather than that caused by fluid friction. Also, results indicate that the increase in the number of funnels (from 4 to 5 funnels) has a negligible effect on total irreversibility.