Why isentropic mass is taken for calculation of area of nozzels

AI Thread Summary
Isentropic mass is used in nozzle area calculations to provide a standardized reference for performance under ideal conditions, allowing for comparisons across different scenarios. The discussion highlights confusion regarding the calculation process, where the actual mass flow rate is given, and isentropic mass is derived from it to determine the nozzle area. This approach is based on the assumption that designs should consider idealized conditions for efficiency and performance benchmarks. Understanding the distinction between actual and isentropic mass flow rates is crucial for accurate nozzle design. The clarification emphasizes that design problems often reference isentropic conditions to ensure optimal performance metrics.
engnr_arsalan
Messages
45
Reaction score
0
i was reading an example of area calculation of a nozzle,in which mass flow rate was and coeff. of discharge (ratio of actual mass flow rate to isentropic mass flowrate) was given.
i though the mass flow rate given in example is isentropic and we will first calculate actual mass flowrate from co.eff of discharge then area of nozzle..but totally opposite was done in example the mass flowrate given was actual and they calculated isentropic mass from it then area of nozzle..i didnt understand why they took isentropic mass..because design problems are based on actual condition..
kindly correct me if i am wrong..
 
Physics news on Phys.org
What is the definition of isentropic mass?
 

Similar threads

I Flow rate calculation for laser cutting nozzles
Replies
3
Views
3K
Momentum Thrust of an Over-Expanded Rocket Nozzle
Replies
1
Views
2K
Optimal Size of Rocket Engine Nozzle for Vacuum Performance
Replies
26
Views
3K
I Nozzle Reaction Forces: Explaining the Resultant Force
2
Replies
51
Views
37K
Calculating isentropic efficiency of a compressor
Replies
6
Views
4K
Enthelpy and Isentropic compression/expansion
Replies
3
Views
2K
I Mass Flow Rate Problem: Easy Unite Conversion Tricks
Replies
12
Views
3K
I Understanding the thrust generated by a typical jet engine
Replies
2
Views
2K
How to determine when compressible flow is choked?
Replies
4
Views
2K
Understanding High Thrust of Vacuum Rocket Engines
Replies
2
Views
3K

Hot Threads

Recent Insights

Back
Top