A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Characterization of a Residential Fire Sprinkler Using Phase Doppler Interferometry
The results of a feasibility study to determine if the water sprays produced by residential fire sprinklers can be accurately characterized using phase Doppler interferometry (PDI) are presented. The large size of the water drops produced by fire sprinklers, and the relatively large coverage area of the spray, present significant challenges when attempting to characterize these sprays. These difficulties are especially relevant when using PDI because large drops and large coverage areas may result in trajectory dependent scattering errors and attenuation of the transmitting laser beams. For the residential sprinkler investigated, it was determined that trajectory ambiguity was not a significant source of error, but attenuation of the laser beam resulted in over-counting of drops due to burst splitting. This effect was minimized by properly choosing the operating conditions of the PDI processing electronics. For the spray investigated, the Sauter mean diameter varied from approximately 360 micrometers to 560 micrometers.
Characterization of a Residential Fire Sprinkler Using Phase Doppler Interferometry
The results of a feasibility study to determine if the water sprays produced by residential fire sprinklers can be accurately characterized using phase Doppler interferometry (PDI) are presented. The large size of the water drops produced by fire sprinklers, and the relatively large coverage area of the spray, present significant challenges when attempting to characterize these sprays. These difficulties are especially relevant when using PDI because large drops and large coverage areas may result in trajectory dependent scattering errors and attenuation of the transmitting laser beams. For the residential sprinkler investigated, it was determined that trajectory ambiguity was not a significant source of error, but attenuation of the laser beam resulted in over-counting of drops due to burst splitting. This effect was minimized by properly choosing the operating conditions of the PDI processing electronics. For the spray investigated, the Sauter mean diameter varied from approximately 360 micrometers to 560 micrometers.
Characterization of a Residential Fire Sprinkler Using Phase Doppler Interferometry
J. F. Widmann (author)
2000
40 pages
Report
No indication
English
Laboratory & Test Facility Design & Operation , Building Equipment, Furnishings, & Maintenance , Police, Fire, & Emergency Services , Fluid Mechanics , Sprinkler systems , Fire protection , Residential buildings , Doppler systems , Feasibility studies , Laser beams , Phase doppler interferometry , Five sprinklers , Water sprays
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