For a turbofan engine write down the mathematical expressions for 1. The thrust force 2. The...
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For a turbofan engine write down the mathematical expressions for 1. The thrust force 2. The overall efficiency Prove that the maximum overall efficiency is given by (1+B)u² fQR no,max= Question 4 Figure 2 illustrates a turbofan engine during testing in a test cell. It has the following characteristics: 1. B = 3, f = 2%, V₂ = 3V₁ 2. ma 200kg/s, thrust = 60kN. a) Calculate: m₁, m₂ and my. b) Evaluate V₁, V₂ if f is neglected. c) Calculate the propulsive efficiency. What are your comments? Figure 2 142 For a turbofan engine write down the mathematical expressions for 1. The thrust force 2. The overall efficiency Prove that the maximum overall efficiency is given by (1+B)u² fQR no,max= Question 4 Figure 2 illustrates a turbofan engine during testing in a test cell. It has the following characteristics: 1. B = 3, f = 2%, V₂ = 3V₁ 2. ma 200kg/s, thrust = 60kN. a) Calculate: m₁, m₂ and my. b) Evaluate V₁, V₂ if f is neglected. c) Calculate the propulsive efficiency. What are your comments? Figure 2 142
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Answer 1 The thrust force of a turbofan engine can be expressed mathematically as the sum of the jet ... View the full answer
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