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(Solved): 5) For ideal turbofan engine with optimal fan pressure ratio, the exit velocity of the core stream ...
5) For ideal turbofan engine with optimal fan pressure ratio, the exit velocity of the core stream should equal to that of the fan stream, and the thrust ratio (FR) is equal to: a) zero b) 1 c) d) none of the above 6) Thermal efficiency of an ideal turbofan engine is that of an ideal turbojet engine. a) higher than b) lower than c) equal to d) zero
Expert Answer
A turbofan engine is a type of air-breathing jet engine commonly used in aircraft propulsion. It consists of two primary streams: the core stream and the fan stream. The core stream is responsible for combustion and generates the primary thrust, while the fan stream provides additional thrust by bypassing a portion of the air around the core.Thrust Ratio in an Ideal Turbofan Engine: In an ideal turbofan engine, the goal is to maximize overall thrust efficiency. The thrust ratio (FR) is a measure of how the total thrust is divided between the core and fan streams. The thrust ratio is defined as the ratio of the mass flow rate of the core stream (m_core) to mass flow rate of the fan stream (m_fan).