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A mixed-flow turbofan has a stagnation pressure upstream of the propu atmosphere where the ambient temperature is 219 K and the pressure turbine inlet temperature is 1500 K and the stagnation temperature of t

A mixed-flow turbofan has a stagnation pressure upstream of the propu atmosphere where the ambient temperature is 219 K and the pressure turbine inlet temperature is 1500 K and the stagnation temperature of t

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A mixed-flow turbofan has a stagnation pressure upstream of the propulsive nozzle equal to 2 times inlet stagnation pressure when cruising at M = 0.85 through an atmosphere where the ambient temperature is 219 K and the pressure is 24 kPa. The mass flow of air entering the engine is 140kg/s and the sfc is 0.7 kg hr-1kgf-1. The turbine inlet temperature is 1500 K and the stagnation temperature of the jet is 700 K. The temperature and pressure of the flow through the nozzle may be assumed uniform. Consider the engine is operated on a sea-level static test bed at the same non-dimensional condition. What is the ratio of gross thrust on the test bed to net thrust at cruise? 4.046 2.118 3.8424 O 3.527
Transcribed Image Text:A mixed-flow turbofan has a stagnation pressure upstream of the propulsive nozzle equal to 2 times inlet stagnation pressure when cruising at M = 0.85 through an atmosphere where the ambient temperature is 219 K and the pressure is 24 kPa. The mass flow of air entering the engine is 140kg/s and the sfc is 0.7 kg hr-1kgf-1. The turbine inlet temperature is 1500 K and the stagnation temperature of the jet is 700 K. The temperature and pressure of the flow through the nozzle may be assumed uniform. Consider the engine is operated on a sea-level static test bed at the same non-dimensional condition. What is the ratio of gross thrust on the test bed to net thrust at cruise? 4.046 2.118 3.8424 O 3.527
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