bypass ratio


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bypass ratio

bypass ratio
The numerical ratio of mass airflow in the bypass duct (of a turbojet or a turbofan) to that of mass flow through the engine core. It is cold jet divided by hot jet.
References in periodicals archive ?
Consequently, noise reduction strategies are aimed at increasing bypass ratio to lower nozzle exit velocities and designing bypass and core flows to improve mixing with each other and the atmosphere.
Papamoschou, subscale aero acoustic experiments simulated the exhaust flow of a turbofan engine with a bypass ratio of 6.
investigated the optimisation of the implementation of fan flow deflection for jet noise suppression from a supersonic turbofan nozzle with a bypass ratio of 2.
High bypass ratio generally causes worse, not better, efficiency at supersonic speeds.
The A330neo incorporates latest generation Rolls-Royce Trent 7000 engines with a larger 112 diameter fan for a 10:1 bypass ratio, more seats and new cabin features.
Highest bypass ratio (9:1) and highest overall pressure ratio
7 inches long and incorporates a fan 112 inches in diameter, with a fan air bypass ratio of 6.
As engineers designed jet engines with higher and higher bypass ratios, the question became: Why not make an engine where almost all the air bypasses not just the combustion chamber but the engine itself?
Many new turbofan engine designs just coming into production also use very high bypass ratios for increased fuel efficiency, but the propfan is still about 25 percent more efficient than these, Hanson says.