Flow characteristic investigation of inhibition foam used for fire extinguishment in the underground goaf

2018 ◽  
Vol 116 ◽  
pp. 159-168 ◽  
Author(s):  
Xinxiao Lu ◽  
Hongqing Zhu ◽  
Deming Wang ◽  
Chao Hu ◽  
Hongru Zhao ◽  
...  
Keyword(s):  
Flow Characteristic ◽  
Fire Extinguishment

ASSESSING MEANS AND FORCES SUFFICIENCY FOR FIRE EXTINGUISHMENT AT POWER ENGINEERING FACILITIES

2018 ◽  
pp. 6-12
Author(s):  
Andrei Ishchenko ◽  
◽  
Mikhail Aleshkov ◽  
Vladimir Roenko ◽  
Andrei Kolbasin ◽  
...  
Keyword(s):  
Power Engineering ◽  
Fire Extinguishment

Karakteristik aliran dua fase pada saluran ekspansi tiba-tiba

2018 ◽  
Vol 11 (1) ◽  
pp. 7
Author(s):  
Latif Ngudi Wibawanto ◽  
Budi Santoso ◽  
Wibawa Endra Juwana
Keyword(s):  
Standard Deviation ◽  
Flow Pattern ◽  
Flow Characteristic ◽  
Homogeneous Model ◽  
Flow Equation ◽  
Pressure Recovery ◽  
Sudden Expansion ◽  
Air Velocity ◽  
Model Flow ◽  
Two Phases

This research was conducted to find out the flow characteristic of two phases through the channel with sudden expansion in the form of change of flow pattern and pressure recovery. The test was carried out with variation of superficial velocity of water 0.2-1.3 m / s and superficial air velocity of 0.2-1.9 m / s resulting in pattern of three flow patterns ie bubble, plug, and slug. The expansion channel resulted in some changes to the flow pattern that originally plugs in the upstream channel into bubble in the downstream channel and the slug becomes plug. Pressure recovery experimental results compared with the homogeneous model flow equation and Wadle correlation, both correlations have predictions with standard deviation values of 0.32 and 0.43.

Energy Fields for Fire Extinguishment

1990 ◽  
Author(s):  
Leonard A. Jonas ◽  
J. S. Steel
Keyword(s):  
Fire Extinguishment

Study of the Mechanisms of Fire Extinguishment of Propellants

1961 ◽  
Author(s):  
Jr. Rosser ◽  
Inami Willis A. ◽  
Wise S. H. ◽  
Henry
Keyword(s):  
Fire Extinguishment

Phase II: Fire Extinguishment by Electro-Magnetic Fields

2000 ◽  
Author(s):  
Richard T. Schneider ◽  
Robert J. Hirko ◽  
John D. Cox ◽  
Neil H. Weinstein
Keyword(s):  
Magnetic Fields ◽  
Phase Ii ◽  
Fire Extinguishment ◽  
Electro Magnetic

The effect of anaerobic zone mixing on the performance of a three-stage Bardenpho plant

1998 ◽  
Vol 38 (1) ◽  
pp. 55-62 ◽  
Author(s):  
S. C. Williams ◽  
J. Beresford
Keyword(s):  
Detrimental Effect ◽  
Flow Characteristic ◽  
Tracer Tests ◽  
Poor Performance ◽  
Phosphorus Concentration ◽  
Effluent Quality ◽  
Mixing Energy ◽  
The United Kingdom ◽  
Low Phosphorus ◽  
Anaerobic Zone

Thames Water have built a three-stage Bardenpho activated sludge plant to treat 50% of the wastewater flow at Slough in the United Kingdom. Following commissioning, the plant performed well in terms of nitrification and denitrification but did not produce an effluent with a low phosphorus concentration. One possible explanation for the poor performance was the mixing of the anaerobic zone. The flow characteristic of the anaerobic zone was identified by tracer tests and alternative mixing regimes were tested. The results showed that reducing the mixing energy in the anaerobic zone had no detrimental effect on the effluent quality. The plant has operated with the reduced mixing input for nine months and the effluent phosphorus concentration has been reduced from 2.1 mgl−1 to 0.8 mgl−1.

Numerical Simulation of Enclosed Gas Fire Extinguishment by a Water Spray

1995 ◽  
Vol 5 (2) ◽  
pp. 135-146 ◽  
Author(s):  
V. Novozhilov ◽  
B. Moghtaderi ◽  
D. F. Fletcher ◽  
J. H. Kent
Keyword(s):  
Numerical Simulation ◽  
Water Spray ◽  
Fire Extinguishment

Investigation of suction flow characteristic in the inertance hydraulic converters for efficiency improvement

2021 ◽  
pp. 095965182110248
Author(s):  
Xiaoming Chen ◽  
Yuchuan Zhu ◽  
Travis Wiens ◽  
Doug Bitner ◽  
Minghao Tai ◽  
...  
Keyword(s):  
Flow Rate ◽  
Flow Characteristic ◽  
Performance Indicator ◽  
Flow Characteristics ◽  
Check Valve ◽  
Analytical Models ◽  
Switching Frequency ◽  
Experimental Measurements ◽  
Efficiency Improvement ◽  
Suction Flow

The inertance hydraulic converter relies on fluid inertance to modulate flow or pressure and is considered to be a competitive alternative to the conventional proportional hydraulic system due to its potential advantage in efficiency. As the quantification of fluid inertance, the suction flow characteristic is the crucial performance indicator for efficiency improvement. To explore the discrepancy between the passive inertance hydraulic converter featured by the check valve and the active inertance hydraulic converter driven by an equivalent 2/3 way fast switching valve in regard to suction flow characteristics, analytical models of the inertance hydraulic converters were established in MATLAB/Simulink. The validated models of the respective suction components were incorporated in the overall analytical models and their suction flow characteristics were theoretically and experimentally discussed. The analytical predictions and experimental measurements for the current configurations indicated that the active inertance hydraulic converter yields a larger transient suction flow rate than that of the passive inertance hydraulic converter due to the difference of the respective suction components. The suction flow characteristic can be modulated using the supply pressure and duty cycle, which was confirmed by experimental measurements. In addition, the suction flow characteristics are heavily affected by the resistance of the suction flow passage and switching frequency. There is a compromise between the resistance and switching frequency for inertance hydraulic converters to achieve large suction flow rate.

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