Study on fire-rescue command system and key technology of ultra high-rise building
Ultra high-rise buildings always regarded as a landmark of a city. But it also brings some fire safety problems due to crowded people, long evacuation distance, fast fire spread, etc. So the fire consequences are very serious, and it is also difficult to search the personnel in the building under emergency, which make the fire-rescue action of the ultra high-rise building very difficult. As a result, a set of effective information collection and analysis method are needed, which includes the collection of trapped personnel location information, fire information, evacuation routine, similar fire case in history and so on. There has not been a mature ultra high-rise building fire rescue system worldwide so far. In the study, we focused on several key technologies related to this problem, including indoor personnel locating, multisensory fire information fusion, fire source identification and so on. Based on the above technologies, the framework and functional design of an ultra high-rise building fire command and rescue system has been developed.
Entrainment in Fire Plumes
A new technique for measurement of mass flow rates in buoyant fire plumes is described. The characteristics of 10 - 200 k W methane diffusion flames stabilized on porous-bed-burners of 0.10 - 0.50 m dia. are described. A 
transition in the dependence of flame height on heat input and burner size was observed when the flame height was about four times the burner diameter. The mass flow rates in 
the buoyant plumes produced by the fires were measured for a range of elevations starting just below the time-averaged top of the flame and extending to six times this flame 
height. The mass flow rates in this region of the plume were correlated by the use of a simple plume model. Atmospheric and forced disturbances in the air being entrained increased the entrainment rate of the plume.
Model for Fires with Low Initial Momentum and Nongray Thermal Radiation
A theoretical fire model has been developed for turbulent diffusion flames having low initial momentum and nongray thermal radiation. Equations of motion are solved using the Karman-Pohlhausen integral method. To apply the integral method to fires having low initial momentum, a newly postulated ambient-air entrainment law accounts for rapid fluid acceleration from initially low velocity at a liquid pool, to much higher velocities established under buoyant rise of the combustion products. The fire is assumed optically thick in the direction of its symmetry axis, and axial-radiation heat transfer is neglected. In the radial direction, radiation mean free path is assumed finite; radial-radiation heat transfer is computed with the exact radiation transport equation, with all the fire's radiating gaseous species represented as realistic nongray radiators. Fire-model predictions fall within scatter of experimental flame-height and spectral-radiation data for liquefied-natural-gas fires.