Inconsistency in the results of one of the lessons

- October 29, 2023 at 11:02 am
  yarykgv
  Subscriber
  Hello everyone, the other day I went through one of the lessons on using Ansys Fluent - /courses/index.php/courses/cfd-in-aero/lessons/commercial-aircraft-propulsion-thrust-from-a-convergent-nozzle/
  I did everything right and got the same result as in the lesson:
  - from lesson
  - my data
  But I decided to check the coefficients from the "Results and Discussion" section using the same formulas and nothing matched:
  - - from lesson
  - - my data calculated in MathCad
  The problem is that I can't understand what I calculated wrong. I assume that I do not correctly understand some physical quantities in the formula.
  Task input -
- October 30, 2023 at 12:41 pm
  
  Federico
  Ansys Employee
  
  R is the air specific constant of R_air = R_universal/M_air = 287 J/kg/K, not the universal gas constant.
  - October 30, 2023 at 7:12 pm
    
    yarykgv
    Subscriber
    
    Thank you very much. Now everything is correct.