CFD Investigation into Flow Characteristics of a Special Splash Lubrication in Light Helicopters

Lubricating oil flow characteristics are the primary concern in main reducer of light helicopters. To improve lubricating performance reducer, a special lubrication system is innovatively constructed by adding two oil-guiding tubes to hub output gear, and influence investigated through CFD (computational fluid dynamics) techniques. A model gearbox integrated with VOF (volume fluid) technique was established explore oil–air two-phase inside gearing system. validate proposed model, specialized testing rig devised manufactured examine features distribution. The effects structure parameters operating conditions on explored. Comparing experimental numerical findings reveals that inner diameter tube rotational speed driven gear have significant performance. In contrast, length installation end tube, its angle, oil-immersion depth show little impact.