3905 -- Measurement of Turbulence Statistics in a Model Fire Room by LDV PDF

Precise measurement of turbulence statistics of flow and temperature fields in a model fire room was conducted using a laser Doppler velocimeter (LDV) and a fine thermocouple measuring 12 micrometres in diameter. The purpose of this experiment was to clarify the turbulence structure of the flow and temperature fields within a room having a large temperature distribution and also to obtain data for verifying the numerical simulation of a turbulent flow field where significant density variation caused by a large temperature distribution is expected. The phenomenon of smoke movement within a building on fire corresponds to such flow and temperature fields. This experiment quantitatively clarifies the turbulence characteristics of velocity and temperature, such as Reynolds stress, turbulent heat flux, and so on, which have hardly been measured in previous studies related to this problem. The results of this experiment provide valuable data for verifying three-dimensional turbulent flow and temperature simulation with density variation.

KEYWORDS: year 1995, measuring, turbulent flow, statistics, smoke, air flow, fire, experiment, temperature distribution, properties,speed, heat flow