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- W2240328596 abstract "A simple ventilation system in mining and tunnelling requires that air be brought to the working area via an intake airway and expelled back to the atmosphere via a return airway. In the development of long tunnels one of the airways takes the form of a series of prefabricated ventilation tubes, which invariably leak in a number of places, with an auxiliary fan or fans in series. Assuming uniform leakage along the duct, an ordinary differential equation, describing the pressure and volume flow rate of air along the duct, is derived and solved exactly. This also allows the exact expression for the resistance coefficient of leakage paths to be found. The exact solutions are compared with the previously available approximate solutions of Vutukuri and Strzeminski. It is found that the approximate solutions are appropriate for relatively short ducts from which the leakage is low but are not valid for relatively long, leaky ducts, in which case the exact solutions presented here should be used." @default.
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- W2240328596 date "1996-01-01" @default.
- W2240328596 modified "2023-09-26" @default.
- W2240328596 title "Modelling Auxiliary Ventilation Systems for Long Tunnels" @default.
- W2240328596 hasPublicationYear "1996" @default.
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