EINGINERS. ENGINEFRING • In multiple-type combustors, each combustor has a fuel supplier and an ignitor. a. Correct. b. Incorrect. • The pressure drop across the combustor affects: a. The fuel consumption and power output. It is normally around (2-8) % of the static pressure. b. The fuel consumption since increased by (2-8) %. Power output only since it decreases the turbine pressure ratio. The power output since it reduces the turbine outlet pressure. is achieved by passing the cooling air through the porous wall of the gas turbine blade. . Transpiration cooling b. Film cooling. C. Impingement cooling. d. Convection cooling. • in the shown graph, which statement is correct? HP LP T HPT power always produces less power than LPT. b. HPT power always produces more power than LPT. c. HPT power is sometimes less than LPT power. d. HPT and LPT produce same power. Reaction turbines usually have higher efficiencies than impulse turbines. However, the amount of work generated by impulse turbines is higher than reaction turbines. a. Correct. b. Incorrect. The gas turbine cycle combustor outlet temperature profile must be uniform. Any non-uniformity in this temperature profile causes thermal stress on the turbine blades, which could lead to decrease the thermal efficiency. a. Correct. b. Incorrect. EERING

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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Transcribed Image Text:ENSINEERING • In multiple-type combustors, each combustor has a fuel supplier and an ignitor. a. Correct. b. Incorrect. The pressure drop across the combustor affects: a. The fuel consumption and power output. It is normally around (2-8) % of the static pressure. b. The fuel consumption since increased by (2-8) %. C. Power output only since it decreases the turbine pressure ratio. The power output since it reduces the turbine outlet pressure. . is achieved by passing the cooling air through the porous wall of the gas turbine blade. Ua. Transpiration cooling. b. Film cooling. c. Impingement cooling. d. Convection cooling. In the shown graph, which statement is correct? HP LP HPT power always produces less power than LPT. b. HPT power always produces more power than LPT. c. HPT power is somețimes less than LPT power. d. HPT and LPT produce same power. T. T. Reaction turbines usually have higher efficiencies than impulse turbines. However, the amount of work generated by impulse turbines is higher than reaction turbines. a. Correct. b. Incorrect. The gas turbine cycle combustor outlet temperature profile must be uniform. Any non-uniformity in this temperature profile causes thermal stress on the turbine blades, which could lead to decrease the thermal efficiency. a. Correct. b. Incorrect.

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