The pressure transient analysis of the Concorde refuelling system is designed to predict pressure variation within the aircraft system during tank inlet valve closure on completion of refuelling and during an emergency isolation of the aircraft system from the refuelling supply.
The comparison between the predicted and observed pressure variations, recorded on a full scale fuel system test rig, was found to be at worst, within 10 per cent, during tank inlet valve closures, although the programme underestimated some peak pressures. Closer agreement was achieved during emergency system isolation.
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