Proceedings of the 27th National and 5th International ISHMT-ASTFE Heat and Mass Transfer Conference December 14-17, 2023, IIT Patna, Patna-801106, Bihar, India
Partitioning of Heat Fluxes to Lumped Body Engulfed in Double Pool Fires
摘要
Heat transfer analysis of the lumped body in a single pool
fire (SPF) and double pool fire (DPF) are analysed. In the case
of an SPF, a lumped body is engulfed in the fire with a
thermocouple attached. In the case of DPF, the lumped body is
only engulfed in the first fire, and the second fire is allowed to burn without any disturbance. In this study, a comparison is
made between SPF and DPF. In DPF, there will be an additional radiation contribution from the second fire onto the body engulfed in the first fire. There will be an increase in the
temperature of the lumped body because of the additional
radiation coming from the second fire. These experiments are
done for a 0.1 m diameter gasoline pool fire with different
separation distances between pans from 0 cm to 10 cm with an
increment of 2.5 cm. Brass Lumped body with three cylindrical geometries with height-to-diameter ratios of 1, 1.5, and 2 are analysed. Heat flux to the lumped body, such as radiation, convection, net heat flux, and radiative losses, are analysed. The Adiabatic surface temperature for all the experiments is calculated at steady state. It is observed from the experiments that there is a significant increase in the temperature of the lumped body for DPF with a separation distance of 0 m with 50 to 60 K when compared to SPF. As the separation distance increases, the effect of the second pool fire on the lumped body declines, as can be observed from temperature data, and DPF behaves similarly to SPF at a separation distance of 10 cm.