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Optimizing Oil Jet Direction for Minimum Churning Loss in High-Speed GearboxesIn a high-speed geared aircraft engine, a small stream of oil can have a surprisingly large effect on total power consumption. Oil must reach gear teeth,…
The Effect of Planet Carrier Web Thickness on Torsional Stiffness and Load SharingIn a geared aircraft engine, the planet carrier is a structural component with a demanding dual role. It must position the planet gears accurately while…
Fillet Radius Variation and Stress in Thin Gear RimsIn an aircraft reduction gearbox, the tooth root fillet is a small geometric feature with a large structural influence. Its radius governs how smoothly load…
Optimising oil nozzle placement for uniform planetary cooling with DOEModern geared turbofans route enormous power through planetary gear stages, where sun, planet and ring gears spin at speeds that push lubricant films into…
Shaft Taper and Its Effect on Bearing Fit and Rotordynamic StabilityThe OPTIMIZE Project is exploring how small geometric choices ripple through the entire drivetrain of a modern geared aero engine. Among those choices, the…
Optimizing Housing Rib Pattern for Stiffness-to-Weight RatioA gearbox housing in a geared aircraft engine must carry significant loads without becoming an oversized shell. Its ribs transfer bearing reactions, gear mesh…
How Lubricant Thermal Conductivity Shapes Gear Bulk Temperature RiseWhen a geared power transmission operates at the rotational speeds demanded by modern aerospace propulsion, friction at the mesh interface converts mechanical…
Curved Teeth Spline Couplings for Fretting Mitigation at High TorqueSpline couplings form the critical torque-transmitting joints inside modern aerospace gearboxes, linking turbine sections to accessory drives and fans to…
How Gear Ratio Step Size Shapes Transmission Efficiency in FlightGeared turbofan engines depend on reduction gearboxes that slow the high-speed turbine output to a propeller or fan-shaft speed the airframe can use. Within…
Bearing preload, thermal growth and internal clearanceIn a geared aircraft engine, a bearing rarely operates at the clearance or preload set on the assembly line. Shaft speed, transmitted torque, lubricant…