When the GT is coupled to a Compressor Load or a Pump Load, then the PV Pressure can be added to gases and liquids. These last two forms of energy eventually become part of the internal energy of the atmospheric air (Fig. When the GT is coupled to an electricity generator, electricity can be generated and distributed throughout the processing plant. The remaining 45.3 percent of the energy shows up as an increase in enthalpy of the gases leaving the engine. That is, the exhaust gases should leave the nozzle at the velocity of the aircraft. 2 The cold-air-standard assumptions are applicable and thus air can be assumed to have constant specific heats at room temperature \left(c_ should be zero. The temperature and pressure at the turbine exit, the velocity of gases at the nozzle exit, and the propulsive efficiency are to be determined.Īssumptions 1 Steady operating conditions exist. Turboprop engine Approximately 80 to 90 of the thrust is produced by the propeller and 10 to 20 of thrust is produced by jet exit of the exhaust gases. As the jets of gas shoot backward, the engine and the aircraft are thrust forward. ![]() ![]() The operating conditions of a turbojet aircraft are specified. The burning gases expand and blast out through the nozzle, at the back of the engine.
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