Explained: Converging-Diverging Nozzle

Why do rocket engines look the way they do? In this video, I'll be explaining what a converging-diverging (CD) nozzle is, and how the flow changes as it passes through it.

See the Relevant Videos section below for some more in-depth videos on each of the flow states, including examples!

=================
===== NOTES =====
=================
► At 11:28, I say "so far, we have subsonic flow throughout the nozzle for all these cases." I meant to say that we have isentropic flow throughout the nozzle for all these cases.

==========================
===== RELEVANT VIDEOS =====
==========================
Pressure Ratio Delineations
https://goo.gl/VQnH1n

Normal Shock in the Nozzle Calculations
https://www.youtube.com/watch?v=b0wvwkKqoVw

Overexpanded Flow Calculations
Coming soon!

Underexpanded Flow Calculations
Coming soon!

Area-Mach Number Relation
https://goo.gl/j4FwQX

Sonic State (Critical, Star)
https://goo.gl/vhjESy

Normal Shock Relations
https://goo.gl/bhw6Ln

Isentropic Relations
https://goo.gl/mkdNHd

Stagnation Relations
https://goo.gl/hBY2AV

==============================
===== RELEVANT BLOG POST =====
==============================

http://www.joshtheengineer.com/2016/11/16/solving-the-area-mach-number-relation/

======================
===== REFERENCES =====
======================
► Notes by Matt MacLean
► Modern Compressible Flow, Anderson
Amazon Link: https://goo.gl/9B7F8H
► Elements of Gasdynamics, Liepmann and Roshko
Amazon Link: https://goo.gl/brfScu
► Gas Dynamics, Zucrow and Hoffman
Amazon Link: https://goo.gl/mwLk8L

===========================
===== THUMBNAIL IMAGE =====
===========================

By NASA (NIX #: MSFC-0201422. [1], Alt. URL.) [Public domain], via Wikimedia Commons

Видео Explained: Converging-Diverging Nozzle канала JoshTheEngineer