Jet engine calculations

[mitch]

Found this pretty cool collection of slides on various calculations regarding jet engines, not sure if it is accurate or not, but I thought it would be interesting to some on this forum!


www.slideshare.net/RoddyNamee/jet-engine-ideal-analysis

[CH3NO2]

Excellent find mitch. Makes it easy to plug the equations into excell.

[katosuguni]

All:

There are some typos in a couple of RoddyNamee's later slides in Part 3 (slides 25-37):

Part 3: Slide 26: Work Done By Compressor, calculate T@4: Transposed T@4 and T@3 as T@4 is cooler than T@3. Equation should be mdot*cp*(T3-T4)to get the shown answer. The "therefore" equation is correct.

Part 3: Slide 30: Using RoddyNamee's numbers, P5 = 229 kPa. Author -literally- hit the wrong key on the keyboard.

Part 3: Slide 33: Air density answer is off by 100 kPa due to error on slide 30. Author states .677, but should be ~1.20

Part 3: Slide 34: Error on Slide 30 continues to propagate. Corrected Nozzle Area ~.16 m^2

Part 3: Slide 35: Errors from Slide 30 continue. Thrust is 72.2 kN.

Thank you,

Suguni