Microsoft Word - Cengel and Boles TOC _2-03-05_.doc

9–9 ■ THE BRAYTON CYCLE WITH REGENERATION In gas-turbine engines, the temperature of the exhaust gas leaving the tur- bine is of ...

When the cold-air-standard assumptions are utilized, it reduces to (9–24) A regenerator with a higher effectiveness obviously sa ...

9–10 ■ THE BRAYTON CYCLE WITH INTERCOOLING, REHEATING, AND REGENERATION The net work of a gas-turbine cycle is the difference be ...

place between states 5 and 6. The gas enters the first stage of the turbine at state 6 and expands isentropically to state 7, wh ...

If the number of compression and expansion stages is increased, the ideal gas-turbine cycle with intercooling, reheating, and re ...

520 | Thermodynamics Then Thus, and A comparison of these results with those obtained in Example 9–5 (single- stage compression ...

9–11 ■ IDEAL JET-PROPULSION CYCLES Gas-turbine engines are widely used to power aircraft because they are light and compact and ...

determined from Newton’s second law. The pressures at the inlet and the exit of a turbojet engine are identical (the ambient pre ...

remaining part of the energy released shows up as the kinetic energy of the exhaust gases relative to a fixed point on the groun ...

524 | Thermodynamics Process 4-5(isentropic expansion of an ideal gas in a turbine): Neglecting the kinetic energy changes acros ...

Modifications to Turbojet Engines The first airplanes built were all propeller-driven, with propellers powered by engines essent ...

The turbofan engine on an airplane can be distinguished from the less- efficient turbojet engine by its fat cowling covering the ...

are more efficient than jet engines, but they are limited to low-speed and low-altitude operation since their efficiency decreas ...

external to the system. A second-law analysis of these cycles reveals where the largest irreversibilities occur and where to sta ...

Chapter 9 | 529 EXAMPLE 9–10 Second-Law Analysis of an Otto Cycle Determine the exergy destruction associated with the Otto cycl ...

530 | Thermodynamics Therefore, the irreversibility of the cycle is The exergy destruction of the cycle could also be determined ...

Chapter 9 | 531 use per vehicle in the United States has increased to 603 gallons in 1999 (worth $1206 at $2.00/gal) from 506 ga ...

532 | Thermodynamics noise and engine wear during highway driving by decreasing the engine rpm while maintaining the same vehicl ...

Chapter 9 | 533 Park in the Garage The engine of a car parked in a garage overnight is warmer the next morn- ing. This reduces t ...

534 | Thermodynamics the vehicle’s handling adversely, and hurt the fuel economy by increasing the rolling resistance. Overinfla ...