What is a high-bypass turbofan?
A High-Bypass Turbofan is a jet engine characterized by a large fan at the front, which generates most of the thrust. Low bypass engines often have a multistage fan which generates a low volume but relatively high speed air stream whereas high bypass engines usually have a single stage fan which generates a high volume but relatively low speed air stream.Lower fuel consumption that comes with high bypass ratios applies to turboprops, using a propeller rather than a ducted fan. High bypass designs are the dominant type for commercial passenger aircraft and both civilian and military jet transports.
How does a high-bypass turbofan work?
In a high-bypass design, the ducted fan and nozzle produce most of the thrust. Turbofans are closely related to turboprops in principle because both transfer some of the gas turbine’s gas power, using extra machinery, to a bypass stream leaving less for the hot nozzle to convert to kinetic energy. The CFM56-5B family is rated between 22,000lbs and 33,000lbs, and the CFM56-7 family is rated between 19,500lbs and 27,300lbs. The V. A5 family has five variants rated between 24,000lbs and 33,000lbs. Most engines operate flight cycle (EFC) times of about 1. FH) or EFH.The CFM56 is a high-bypass turbofan engine (most of the air accelerated by the fan bypasses the core of the engine and is exhausted out of the fan case) with several variants having bypass ratios ranging from 5:1 to 6:1, generating 18,500 to 34,000 lbf (80 kN to 150 kN) of thrust.