E-CodeConverging nozzle: choking and thrust — a TI-84 Plus CE program
NOZZLE is a TI-BASIC program for the TI-84 Plus CE. Supply and back pressure decide choked or not: exit Mach, pressure and temperature, exit speed, mass flow and thrust for a perfect gas.
What it asks for and what it shows
It asks for 6 values at its prompts. In the example below it shows ME, PE KPA, TE K, VE M/S, M KG/S, THRUST, CHOKED.
Example run
One of its oracle test cases: “choked air jet”. The inputs are typed in order, and the results are the values the case expects on the screen.
| Step | Value |
|---|---|
| You enter | |
| Input 1 | 500 |
| Input 2 | 300 |
| Input 3 | 101.325 |
| Input 4 | 20 |
| Input 5 | 1.4 |
| Input 6 | 287 |
| The screen shows | |
ME= | 1 |
PE KPA= | 264.1408939 |
TE K= | 250 |
VE M/S= | 316.9384798 |
M KG/S= | 2.333558561 |
THRUST= | 1065.226291 |
| Text | CHOKED |
How it's checked
4 test cases, each checked against an independent method. Replayed key by key on a virtual TI-84 Plus CE, they make 30 checks.
How E-Code checks every program
Run it or put it on your calculator
- Open the library in the TI-84 Plus CE calculator and pick “Converging nozzle: choking and thrust” (NOZZLE).
- Put it on your own calculator with a computer and a USB cable, or type it in by hand.
Related programs
- Isentropic flow and normal shock
- Pipe friction: Colebrook, Darcy-Weisbach
- Pipe network: series + parallel
- Venturi meter and Pitot tube
- Open channel: Manning, critical depth
All TI-84 Plus CE engineering programs · All TI-84 Plus CE programs