Gas Turbine Jet Propulsion Er Vinayak G Patil

Gas Turbine & Jet Propulsion Er. Vinayak G. Patil Head Science & Humanities Department Vasantrao More Polytechnic Tehu, Parola

Classification of Gas Turbine Ø On The Basis Of Combustion Process Joule Cycle or Brayton Cycle Atkinson Cycle Ø On The Basis Of path of working substance Open cycle gas turbine Closed cycle gas turbine

Classification of Gas Turbine Ø On The Basis Of action of expanding gases Impulse Turbine Reaction Turbine Ø On The Basis Of direction of flow Axial flow turbine Radial flow turbine

Constant pressure Gas Turbine

Open Cycle Gas Turbine

Closed Cycle Gas Turbine

Methods to improve Thermal efficiency of Gas Turbine ü Regeneration ü Improving turbine output Improve turbine efficiency Better quality of fuel Increasing Max Cycle Temp

Methods to improve Thermal efficiency of Gas Turbine ü Reducing compressor input Intercooling By increasing the compressor efficiency Water injection

Open Cycle Gas Turbine with Regeneration

Open Cycle Gas Turbine with Inter cooling

Open Cycle Gas Turbine with Reheating

Jet Propulsion

Turbojet Engine

Turbojet Engine Advantages Jet Propulsion q Sp. Wt is ¼ times the reciprocating engine. q No reciprocating parts , free from unbalance forces. q Small frontal area & better aerodynamic shape. q Thrust is applied directly there is no loss of power transmission. q Continuous combustion gives continuous thrust.

Turbojet Engine Disadvantages Jet Propulsion q Particularly at low press. , thermal efficiency is lower. q The plant is very noisy. q Compression ratio is not constant. q Materials are costly & life short.

Turbo Propeller Engine

Ram Jet Engines

Basic Characteristics of Ram Jet Engines o No moving parts & light weight as compared with turbojet engines. o Mass production at relatively low cost. o For steady combustion certain devices in the form of flame holders or pilot flames are required. o At low & moderate speeds , the fuel consumption is too large. The fuel consumption however decreases flight speed.

Rocket Propulsion

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