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1. TITLE - Determinatio of jet-propelled plane upper and beak Efficiciency. 2. OBJECTIVE -To regularize the jet pep pill and nozzle efficiency. 3. INTRODUCTION Nozzles be suitably shaped passages in which a facile accelerates as its bosom decreases. If the wandering is compressible, (i.e. a gas or vapour), very high velocities can be obtained with quite mitigate pressure ratios, (e.g. the local speed of buy the farm when the pressure is approximately halved). Nozzles are vital components in a entire variety of engineering applications, such as turbines, atomic add together 19 Propulsion, Rockets and Ejectors The high pep pill jet of fluid go forth a nozzle whitethorn be used in several(prenominal) ways: In a turbine, the kinetic energy stored in the fluid forms the energy available to the blades or the rotor for revolution to shaft work. In rockets and jet propulsion, the change of impulsion associated with the hurrying changes in the nozzle provides most of the propulsion force. In ejectors and injectors, the changes of impetus of the jet, with its entrained fluid, is used to bring about the desired pressure changes. The noble-minded Nozzle And Nozzle Efficiency Flow through a improve nozzle would be reversible, (i.e. without heat transfer and without frictional effects, shocks, etc.), and lead therefore be isentropic.

If thermodynamic data cogitate to the fluid is known, the theoretical velocities and other relationships for an isentropic nozzle may be calculated. Due to the effects of friction, uncontrolled expansion, shocks etc., the velocity of the jet of fluid leaving a nozzle will be humiliat e than that from an ideal nozzle. 4. ! THEORY Pressure Ratio rp=P2P1 Nozzle Efficiency ?N= veridical KE at nozzle exitIsentropic KE at nozzle exit=V2a2V2s2 P1(inlet pressure) isentropic Process h echt Process 1 P2(exit pressure) 2a 2s S Finding the actual velocity Note that the air has no axial velocity when it leaves the pertain head. From Newtons Second...If you want to notice a well(p) essay, order it on our website: OrderEssay.net

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