A concept of external aerodynamic elements in improving the performance of natural smoke ventilation in wind conditions

Abstract

ARTICLES YOU MAY BE INTERESTED IN, Grzegorz Kimbar Abstract. This paper is a proposal of a new device that may be used as a component of natural smoke ventilation systems -an external aerodynamic baffle used to limit the wind effect at the most adverse angle. Natural ventilation is not only affected by the external wind, but also dependent on the angle of wind attack. It has been proven, that at angles between 45° to 60° the performance of such device is the lowest. This is the reason why additional device is proposed -external baffle that could hypothetically increase the performance at chosen angles. The purpose of this paper is to explore this idea by numerical modelling of such external elements on a validated natural ventilator model, with use of ANSYS® Fluent® CFD model.

Fire smoke dispersion inside and outside of a warehouse building in moderate and strong wind conditions

“…Observations formed in the cited literature are consistent with the ones observed in the current study. A change in the performance of natural outlet at different velocities and in differing vortice patterns were studied in isolation in [66] and also observed in [5]. To illustrate the conditions associated with patterns of pressure distribution, flow and pressure field surrounding the building at 5 and 10 m/s wind velocity are presented for following cases (Fig.…”

Verification of CFD model of plane jet used for smoke free zone separation in case of fire

“…A vast majority of fatalities connected with fire are triggered by the smokeinhalation. Therefore, to decrease the number of fatalities air curtain devices can be used as virtual screens to stop smoke spreading in a building object [5,6,7,8,9]. Safe evacuation of people and secure intervention of fire fighters are of significant importance and need to be taken into consideration.…”