Research on Variable Camber Wing Optimization Design of Passenger Aircraft

Abstract

The effective drag reduction of variable camber wing of wide-body passenger aircraft at realistic flight condition can improve the performance and flight quality of passenger aircraft.The whole trimmed passenger aircraft configuration is used as the research object,the variable camber model is established based on flaps and spoiler deflection.The Reynolds averaged Navior-Stokes(RANS)equation is used to solve the drag precisely,and establish the response-surface model to perform the multiple flight conditions of different lift coefficients and Mach numbers with variable camber drag reduction.On this basis,the requirement of camber variable manipulation and general drag reduction performance in practice flight process are analyzed,and the general profit of cruise efficiency is evaluated based on Breguet equation.The results show that two camber settings can lead drag reduction in a large range of lift.When the transport is cruising at a fixed altitude of 10 km,the variable camber wing can reduce the drag with 1.9 cts,and improve the flight time and endurance with 0.72%.When the transport is cruising at stepped altitudes of 8 km and 10 km,the variable camber wing can reduce the drag with 2.9 cts,and improve the flight time and endurance with 1.19%.

Keywords

• variable camber wing
• wide-body passenger aircraft
• drag reduction
• trimmed characteristic
• optimization design