Calculating (transient) rate of cycles of practical thermodynamic engines (turbojet, multi-cylinder car engines etc..)

Physics Asked by Rajat Mondal on September 15, 2020

I tried to make a plan for a turbojet engine with my physics knowledge and I’m stumped in the first step. For any sustained real engine, I need to somehow take a fraction of the energy output and use that to drive the engine into the next cycle. Take carnot cycle for example. For an engine based on that cycle, I need to take part of the total energy output in one cycle and use that to supply the work done in the cold isotherm in next cycle. Or we could use two out of phase carnot cycles and somehow couple them together and depending on how we actually build the engines, there will be some physics that will determine the equilibrium frequency of the engine(cycles per second). I can’t seem to find out what the actual physics is in the case of gas turbine engines. All I found after doing google search are the phrases "compressor-turbine matching" and "compressor turbine operating line" with no solid physics whatsoever. However, it is clear that you increase the cycle rate by increasing fuel injection rate so it must be a function of that. But how do I calculate the rate of cycles(here turbine rpm will do) in this case?

Related Questions

Understanding wavefunctional form of lowering operator for a scalar CFT

0  Asked on January 16, 2021 by darkseid

Relation between dipole moment and polarisation

3  Asked on January 16, 2021

Physical Interpretation of Field Operator in Quantum Field Theory and Mode Expansion

1  Asked on January 16, 2021 by bentley-carr

Current and conductance from the Landauer formula

1  Asked on January 16, 2021 by user2820579

An attempt to solve Feynman’s Disc Paradox

1  Asked on January 16, 2021 by aryamann

How does the partial derivative of a tensor of rank $n$ creates a tensor of rank $n+1$? (cartesian coordinates)

1  Asked on January 16, 2021 by ichverlore

0  Asked on January 15, 2021

Fraunhofer lines during an eclipse

1  Asked on January 15, 2021

3  Asked on January 15, 2021 by borns

Quantum Ising/Heisenberg model, states representation

1  Asked on January 15, 2021 by trantidon

Patch antenna excitation

1  Asked on January 15, 2021 by swap

Why is the kinetic energy for non-relativistic velocities not described by $KE=mc^2$?

3  Asked on January 15, 2021

Confusion regarding temperature and entropy

2  Asked on January 15, 2021

What are hot electrons?

2  Asked on January 15, 2021 by user46147

Which heat capacity is used in the heat equation?

1  Asked on January 15, 2021

Does water produce electromagnetic radiation when it moves?

1  Asked on January 15, 2021

Fluid mechanics – Question Poiseuille exercise

2  Asked on January 15, 2021 by daphoque

Argument on why spin correlation functions in Ising model decay exponentially with a correlation length?

1  Asked on January 15, 2021 by ricknjerry

Simplified forms of Maxwell’s curl equations for special case of $vec{J}$

1  Asked on January 15, 2021 by sharonzh

Distinction between different points at Big Bang Singularity

1  Asked on January 15, 2021 by self-grassmanian