Abstract
Different types of infrared suppression (IRS) systems are numerically investigated to characterize heat transfer and fluid flow behavior three-dimensionally. In this context, the conical funnel, Cylindricallouv funnel, Conicallouv funnel and cylindrical funnel type of IRS systems subjected to integrate effect of radiation from the surface and conjugate free convection heat transfer are elucidated here. Besides this, cooling time is obtained for the conjugate problem with surface radiation. Different governing equations are resolved three-dimensionally for the flow caused by the buoyancy to obtain the distribution of temperature and flow around the funnel. The operational parameters, namely Rayleigh number, emissivity and temperature of the surface, and the number of louvers (holes) are changed for the parametric study. The total Nusselt number and ratio of mass suction are vital functions of the louver numbers. The louvered funnel gives the highest Nusselt number and mass suction rate. It is found that the contribution of radiation from the surface in estimating the rate of total heat transfer is noteworthy, even for the low emissivity cases. The cooling time is much lower for the convection united with radiation than for convection only.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
