The conventional design methods of helicopter nacelle exhaust ejector mixing tube were introduced.Based on the characteristic equation and analysis of influence factors

and with a reference to nacelle exhaust systems of a helicopter

an improved design method of helicopter nacelle exhaust ejector mixing tube was established.Based on this improved method

a helicopter nacelle exhaust mixing tube was designed as an example.By comparing with other design results

this method could improve the design efficiency by 30% and maintain design accuracy within 5% to meet the engineering design requirements

demonstrating its availability and significance in engineering applications.