2D nozzle design of a gradual-expansion nozzle using MoC

Zoli · March 23, 2014, 04:24

Hi! I need a little help with the design. I designed a nozzle with a central starting point of the characteristic lines, so i know how to compute Prandtl-Meyer angle, Mach angle and flow angle Thetha, but i have difficulties with the design of the gradual expansion nozzle- where the characteristic lines at the expansion section are divided from theta0 to thetaMax, like on this picture:

I can draw the first characteristic line, that starts from the inlet radius(in this case from point r=1) , but i don't know how to continue.

Thanks for the replies, have a nice day

FMDenaro · March 23, 2014, 05:02

to tell the truth, I am not sure to understand your question...
However, I can suggest the book of Zucrow ...

Zoli · March 23, 2014, 05:29

Hello FMDenaro!

Thanks for your reply and s orry for my indistinctive question. So, my main question is, how can i determine the length of the expansion section (in ellipse on the picture), what is the distance between the characteristic lines?

mkhm · February 5, 2020, 11:37

Can someone tell me how we can design the expansion section ? I know how to do a minimum length nozzle by the method of characteristics. But how to design from that a gradual expansion nozzle (as depicted in the figure) is not clear for me. Is there any text book explaining this in detail ?

mkhm · February 6, 2020, 12:07

Quote:

Originally Posted by FMDenaro

to tell the truth, I am not sure to understand your question...
However, I can suggest the book of Zucrow ...

Do you know how the minimum length nozzle in the figure above was converted to a gradual expansion nozzle ?

March 23, 2014, 04:24	2D nozzle design of a gradual-expansion nozzle using MoC	#1
Zoli New Member Join Date: Mar 2014 Posts: 6 Rep Power: 11	Hi! I need a little help with the design. I designed a nozzle with a central starting point of the characteristic lines, so i know how to compute Prandtl-Meyer angle, Mach angle and flow angle Thetha, but i have difficulties with the design of the gradual expansion nozzle- where the characteristic lines at the expansion section are divided from theta0 to thetaMax, like on this picture: I can draw the first characteristic line, that starts from the inlet radius(in this case from point r=1) , but i don't know how to continue. Thanks for the replies, have a nice day

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Axisymmetric nozzle design using the MOC	Will James	Main CFD Forum	22	May 24, 2012 01:25
analyze a cd nozzle with fluent which designed by MOC	mehrzad	Main CFD Forum	0	July 6, 2011 04:33
code for supersonic nozzle design using moc	san	Main CFD Forum	4	May 12, 2007 03:49
compressible flow in a counterflow nozzle	d.vamsidhar	FLUENT	0	November 24, 2005 01:45
Info: Short Course On Thermal Design of Electronic Equipment	Arnold Free	Main CFD Forum	0	August 10, 1999 10:18

March 23, 2014, 05:02		#2
FMDenaro Senior Member Filippo Maria Denaro Join Date: Jul 2010 Posts: 6,402 Rep Power: 68	to tell the truth, I am not sure to understand your question... However, I can suggest the book of Zucrow ...

March 23, 2014, 05:29		#3
Zoli New Member Join Date: Mar 2014 Posts: 6 Rep Power: 11	Hello FMDenaro! Thanks for your reply and s orry for my indistinctive question. So, my main question is, how can i determine the length of the expansion section (in ellipse on the picture), what is the distance between the characteristic lines?

February 5, 2020, 11:37		#4
mkhm Member Mary Join Date: Jul 2017 Posts: 94 Blog Entries: 1 Rep Power: 7	Can someone tell me how we can design the expansion section ? I know how to do a minimum length nozzle by the method of characteristics. But how to design from that a gradual expansion nozzle (as depicted in the figure) is not clear for me. Is there any text book explaining this in detail ?