The experimental and theoretical analysis was implemented on the basis of fuel scrubbing orthogonal tests for reducing experiment times.Results show that the nitrogen-filling performance of the scrubbing ejector is influenced by important factors of area ratio m

lenth to diameter ratio L/D

and nozzle pressure p.But their significance is relative.A series of experience formulae and good values is found out.The scrubbing ejector designed and manufactured on these formulae and values not only ejects very small nitrogen-enriched microbubbles to improve scrubbing efficiency

but also satisfies the oxygen concentration of ullage throughout.