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FPEC's mapping software (Trajectory simulation) for water or foam monitor comprise flying trajectory calculation programs of water or foam stream discharged from a nozzle. The water or foam discharged stream will be affected strongly by wind, which effect can be calculated by this program. In case of water discharge, the trajectory simulation is possible for not only solid stream but also for spray streams with up to 120 deg angle.The calculated trajectory is displayed on the 3D graphics by AutoCAD to check if coverage by the monitor is adequate visually. By this mapping software (Trajectory simulation), appropriate mapping of fixed or portable monitors, fire trucks etc., can be studied under windy conditions,.
Experience the simulation
Water Monitor
Water stream trajectory depends on characteristic on the nozzle type. Based on a nozzle maker's data on discharge trajectory (at least two points are required), specific factors for this software will be decided and then the trajectory simulation will be dedicated for the nozzle. As described below, this software is applicable for various types of water nozzle as well as water monitor, but not for flat type nozzle.
Figure 1-1 shows discharged stream trajectories at the spray angle of zero, 30, 60, 90 and 120 deg. and wind direction is from right side to left side.Figure 1-2 shows water discharge to cover the equipment on the third floor of the elevated structure. The discharged spray angle is 30 deg., so the trajectory is strongly affected by wind. The discharge from downwind side monitor does not fly so long distance, but one s from upwind side monitor reaches to long distance. So overall coverage by monitors can be obtained even under wind condition.
Figure 1-1；various spray angle discharge from fixed water monitor
Figure 1-2；water discharge from upwind and down wind simultaneously
Figure 2-1 shows water discharge from telescopic tower nozzle (left side fire truck) and foam discharge (right side fire truck). The heat flux contour map is also shown around the transformer fire.As shown in figure 2-2, various studies are possible for fire situations by using suitable layout drawing or pictures.
Figure 2-1；discharge water and foam to fire at transformer from fire trucks
Figure 2-2；water discharge from fire boats to a container ship
Figure 3-1 shows simulation for water spray system to discharge water to the vertical vessel under wind condition and displayed on 3D AutoCAD drawing. by AutoCAD function of walk through, you can come into the spray to check if dry spot exists.Figure 3-2 shows simulation for water curtain to check the effectiveness for protection of the adjacent tank from a tank fire. Figure 3-3 shows simulation for water curtain to check the effectiveness for protection of the cooling tower from a tank fire, since the tank is located within 30 m from the cooling tower in contrary to NFPA requirement.
Figure 3-2；water curtain between tanks
Foam stream trajectory depends on characteristic on the nozzle type. Based on a nozzle maker's data on discharge trajectory (at least two points are required), specific factors for this software will be decided and then the trajectory simulation will be dedicated for the nozzle. As described below, this software is applicable for both types of foam nozzle, aspirator type and non- aspirator type.
Figure 4-1 shows discharging foam from a telescopic fire truck to a fire beyond the compressor shelter.Figure 4-2 shows that foam is discharged from a large foam monitor to a sweet spot of the fired tank. Black column on the tank means zone of higher updraft speed by a fire. Foam will be blown off within the zone.
Figure 4-1 foam discharge from fire truck to a fire in process area
Figure 4-2 Foam and water discharge from fire truck to a tank fire
Figure 5-1 shows that foam is discharged from two large foam monitors to the sweet spot of the fired tank beyond the pipe rack. Black column on the tank is the same meaning as the above example. Figure 5-2 is enlarged view around the pipe rack in 3D graphics. For mapping of water or foam discharge equipment, 3D layout graphics are required for confirmation of no obstruction against foam discharge.
Figure 5-1 foam discharge from a large foam monitor to a fired tank
Figure 5-2 check obstruction for foam discharge
