The objective is to assess the behaviour of jet fires impinging on or engulfing obstacles, especially vessels and pipework, and the response of the vessel or pipework and its contents to the fire.
In practice many incidents result from jet fires impinging on a localized area of the vessel. This can lead to severe localized heating and hence premature vessel failure. The project concerns the quantification of specific hazards posed by the production, storage, and transportation of flammable gases and pressurized liquefied gases, such as a fire involving a storage tank, which is both a common and potentially serious hazard in the petrochemical industry and during the transportation of flammable and toxic materials.
There are 5 main work programmes as follows.
Quantifying and modelling of jet fires: modelling of unobstructed jet fires, including effects of 2-phase releases, pressure releases, lift off and turbulence.
Quantifying the interaction between obstacle and the fire: modelling of jet fires engulfing small obstacles, such as pipework, and modelling of jet fires impinging on large obstacles such as storage vessels.
Modelling the thermal response of a pressure vessel: the thermal response of a vessel containing pressurized liquids and nearby flange connections to partial heating by jet fire impingment will be described.
The effectiveness of 3 types of mitigation measures, water spray cooling, insulation and fire walls, will be assessed with respect to jet fire attack.
A limited number of field tests will be used to study the failure modes of pressure vessels under jet fire attack. The data will be compared with data on cold vessel failures and small scale laboratory trials. The results will be included in a model that describes the thermal response of a pressure vessel up to failure.
Funding SchemeCSC - Cost-sharing contracts
WA3 4NE Warrington
60486 Frankfurt Am Main
B91 2JW Solihull
SK17 9JN Buxton
CH1 3SH Chester
SE1 0AA London