Fig 2 - uploaded by Angui Li
Content may be subject to copyright.
Source publication
Background: When fire occurs, smoke spreads from the bottom of the building to the top through the stairwell, and spreads over the stairwell. This horizontal movement of high temperature smoke is dangerous because people can only reach the subway exit by stairs during the fire. Methods: To control horizontal movement of the smoke, a novel fire smok...
Similar publications
Compression of multispectal images is of great importance in an environment where resources such as computational power and memory are scarce. To that end, we propose a new extremely lowcomplexity encoding approach for compression of multispectral images, that shifts the complexity to the decoding. Our method combines principles from compressed sen...
Citations
... In 2013, Luo et al. [23,24] worked on a modified double-jet air curtain's smoke confinement and exhaust efficiency, using an investigation of discharge velocity and heat release rates. Later, Li et al. [25] proposed an opposite double-jet configuration for controlling smoke at the stairwells. Recently, the push-pull air curtain system has been designed to reach a smoke control efficiency higher than 90%. ...
The infiltration of cold air through the open doors is controlled using air curtains, resulting in lower thermal loss and higher energy efficiency in the buildings. Meanwhile, severe outdoor conditions affect the performance of the air curtains drastically. In this context, the performance of a multi-nozzle air curtain with two different geometries has been investigated under various outdoor conditions using validated CFD. The air curtain system creates a thermal barrier with a specific sequence of large nozzles, small nozzles, and holes that blow air downward at different speeds. A half scale (1:2) model located above a door in the middle of the wind tunnel at the University of Sherbrooke is used for the hot wire measurements of the critical characteristics for different wind velocities (0, 4, and 9 m/s). Also, the SST
turbulence model has shown the highest accuracy during the turbulence model sensitivity analysis and is used for complementary studies. Despite all the similarities, the results indicate that Fifth Order Polynomial Nozzles are more resistant against the high-velocity front winds, comparing the Arc Shape Nozzles, due to 3.6% augmentation of the exit velocities at large nozzles and shorter convergence areas. Also, this fact is proven by the studies of the impact point of these air curtains.
