CFD calculations of gas leak dispersion and subsequent gas explosions: Validation against ignited impinging hydrogen jet experiments

2010 ◽  
Vol 179 (1-3) ◽  
pp. 84-94 ◽  
Author(s):  
Prankul Middha ◽  
Olav R. Hansen ◽  
Joachim Grune ◽  
Alexei Kotchourko
Keyword(s):  
Gas Leak ◽  
Gas Explosions

Using the PIV Techniques in the Expertise of Gas Explosions

Mining Revue ◽  
2021 ◽  
Vol 27 (2) ◽  
pp. 42-48
Author(s):  
Nicolae Ioan Vlasin ◽  
George Artur Găman ◽  
Emilian Ghicioi ◽  
Gheorghe Daniel Floarea ◽  
Adrian Bogdan Șimon-Marinică
Keyword(s):  
Suspended Particles ◽  
Test Stand ◽  
Laser Source ◽  
Cmos Camera ◽  
Fuel Gas ◽  
Combustible Gas ◽  
Physical Experiments ◽  
Gas Leak ◽  
Gas Explosions ◽  
Recording Conditions

Abstract Given the possibilities offered by PIV systems, it was considered appropriate to test them in the study of the formation of explosive atmospheres. In this sense, within the INCD INSEMEX Petroșani laboratories, a test stand was created subject to the conditions of applying PIV techniques. Thus, this stand was built of transparent materials, having the possibility to introduce, in the inner volume, the suspended particles and the combustible gas, being at the same time able to be sectioned by the light plane generated by a laser source and to provide the recording conditions using a CMOS camera. The physical experiments concerned both the situation of a normal atmosphere inside the test stand and the situations of the appearance of a fuel gas leak and an efficient source of initiation of the formed explosive atmosphere.

Investigation of the Plasma Focus in a Device with a Pulsed Gas Leak-in

2001 ◽  
Vol 55 (3) ◽  
pp. 5
Author(s):  
N. I. Ayzatsky ◽  
Yu. Ya. Volkolupov ◽  
A. N. Dovbnya ◽  
V. V. Zakutin ◽  
V.I. Kraus ◽  
...  
Keyword(s):  
Plasma Focus ◽  
Gas Leak

Rancang Bangun Smart Case Sistem Monitoring Tabung Gas Elpiji Berbasis Mikrokontroler

CHIPSET ◽  
2020 ◽  
Vol 1 (02) ◽  
pp. 61-68
Author(s):  
Anisha Fadia Haya ◽  
Werman kasoep ◽  
Nefy Puteri Novani
Keyword(s):  
Error Rate ◽  
Load Cell ◽  
Sensor System ◽  
System Testing ◽  
A Value ◽  
Gas Leak ◽  
Weight Value ◽  
Gas Cylinders ◽  
Sms Notification ◽  
Module System

This study aims to create a system that can monitor gas cylinders where this device consists of two systems, the first is a system to measure the weight of 3kg LPG gas cylinders to find the remaining gas which will then be displayed on the LCD, and the second the system gives a notification (alarm) if there is a gas leak via SMS. This system consists of Arduino UNO Microcontroller components, Load cell Sensor, MQ-6 Sensor, and SIM800L GSM Module. For overall system testing, the load cell sensor system can display a percentage of the weight value obtained an error rate of 0%, this indicates that the formula used in the program runs according to what is desired. In the MQ-6 sensor system can make the buzzer on at a value >= 700 ppm, the results of the buzzer can live when the detected gas value >= 700 ppm, this is as desired. In the sim800L gsm module system can send leak notifications, the results obtained that the module can send SMS notifications. And the system turns on the buzzer when the LPG gas has reached the minimum limit, the results obtained by the buzzer will sound when the remaining gas value <= 16%. Based on tests conducted on this system the system can measure the desired weight of the cylinder to look for the remaining gas in the form of a percentage and detect a gas leak and then send an SMS notification.

scholarly journals A Novel Electrically Small Ground-Penetrating Radar Patch Antenna with a Parasitic Ring for Respiration Detection

Sensors ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 1930
Author(s):  
Di Shi ◽  
Taimur Aftab ◽  
Gunnar Gidion ◽  
Fatma Sayed ◽  
Leonhard M. Reindl
Keyword(s):  
Ground Penetrating Radar ◽  
Patch Antenna ◽  
Low Cost ◽  
Substrate Material ◽  
Geometric Parameters ◽  
Gas Explosions ◽  
Aerial Vehicle ◽  
Electromagnetic Characteristics ◽  
Ground Penetrating ◽  
Quick Search

An electrically small patch antenna with a low-cost high-permittivity ceramic substrate material for use in a ground-penetrating radar is proposed in this work. The antenna is based on a commercial ceramic 915 MHz patch antenna with a size of 25 × 25 × 4 mm3 and a weight of 12.9 g. The influences of the main geometric parameters on the antenna’s electromagnetic characteristics were comprehensively studied. Three bandwidth improvement techniques were sequentially applied to optimize the antenna: tuning the key geometric parameters, adding cuts on the edges, and adding parasitic radiators. The designed antenna operates at around 1.3 GHz and has more than 40 MHz continuous −3 dB bandwidth. In comparison to the original antenna, the −3 and −6 dB fractional bandwidth is improved by 1.8 times and 4 times, respectively. Two antennas of the proposed design together with a customized radar were installed on an unmanned aerial vehicle (UAV) for a quick search for survivors after earthquakes or gas explosions without exposing the rescue staff to the uncertain dangers of moving on the debris.

scholarly journals Vent burst doors as an effective method of suppressing the dangers of gas explosions

AIP Advances ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 035112
Author(s):  
Yashengnan Sun ◽  
Xihua Zhou ◽  
Gang Bai ◽  
Ang Li ◽  
Tianyu Xin ◽  
...  
Keyword(s):  
Gas Explosions
Sign in / Sign up

Export Citation Format

Share Document