| Experiment ID
| GHT35-GHT47 (11 tests)
|
| Short Description
| Partial confinement – simulating a “lane” – consisting of 2 parallel walls at a distance of 3 m with a length of 10m and a height of 3 m. At one end of the lane an additional wall has been installed. The whole volume has been filled with H2/air mixture, enclosed within a very thin PE-foil, with concentrations between 37 and 41 vol% H2. The mixture has been ignited in the centre of the closed end or open end. For the generation of turbulence a fan with dia. 1.25 m and max. efficiency of 24 000 m3/h has been used at the closed end of the lane. The tests have been performed with 50%, 75%, 90% and 100% of this maximum value.
|
| What phenomena were studied
| Flame acceleration under conditions of partial confinement and turbulence
|
| What phenomena / effects can be studied
| Correlation between flame speed and turbulence. Observation of DDT
|
| Instrumentation
| Gas chromatographic analysis of mixture homogeneity. 2 types of pressure transducers: 6 piezoresistive and 6 piezoelectric sensors, installed within the lane floor. 3 high speed cameras (2 with view from above, 1 with horizontal view into the lane). Measurement of cold flow field within the air-filled PE-enclosure by means of hot wire anemometer for situation with 100% fan speed .
|
| Test variables
| Turbulence intensity; Degree of partial confinement; Location of ignition
|
| Data description / Data completeness
| Film recordings (16 mm) available; pressure/time histories as hardcopies; turbulence data
|
| Data availability
| Publicly accessible
|
| Source of data / Reference
| Fh-ICT-report (July 1984): Explosion von Wasserstoff/Luft-Gemischen unter teilverdämmten Bedingungen und unter dem Einfluß einer turbulenten Strömung.
|
| Why were chosen
| Realistic scenario
|
| Relevance to the project purposes
| Correlation between turbulence and flame speed; criteria for DDT
|
| Experimental data
|
|
| Results of simulations
|
|
