Category: Jet Propulsion

Neglecting the friction and other losses, we have Rocket propulsive efficiency  Example 17.1 A turbo-jet unit consists of single stage compressor, single stage turbine, and nozzle. The pressure and temperature at the inlet of compressor are 0.8 bar and 280 K, respectively. The pressure at the outlet of compressor is 4.5 bar. The following data…

The basic cycle of a turbo-jet engine in T-s diagram is shown in Fig. 17.7. The various processes are as follows: Process 1−2: Isentropic diffusion of atmospheric air from velocity c1 to c2 = 0 with diffuser efficiency of 100%. 1−2′ is the actual diffusion with diffuser efficiency ηd from p1 to p2. Process 2′−3: Isentropic compression of air in the compressor from p2 to p4. Process 2′–3′ is…

Table 17.1 shows the comparison of jet propulsion and rocket propulsion.   Table 17.1 Comparison of jet and rocket propulsion

In a rocket engine, the fuel and the oxidiser are stored in the propelling body. The rocket can function in a vacuum and is the only device capable of space flight. Rockets may be of the single-stage or multi-stage type, consisting of one or more rocket motors. They may be solid propellant or liquid propellant…

Jet propulsion systems may be classified as follows: 1 Screw Propeller The line diagram of a screw propeller is shown in Fig. 17.1(a). The schematic arrangement and the corresponding T-s diagram are shown in Fig. 17.1(b) and Fig. 17.1(c), respectively. In this system, full expansion takes place in the turbine, and the total power developed by the turbine is…

Jet propulsion is the thrust produced by passing a jet of fluid in the direction opposite to the motion of the object. The propulsive thrust in jet propulsion is obtained by the reaction of the engine produced by the exit of high velocity fluid stream from the nozzle. In case of a jet engine, the…