How to do the singular point for 1D Mach eq? -- CFD Online Discussion Forums

July 8, 2008, 10:56	How to do the singular point for 1D Mach eq?	#1
peter.zhao Guest Posts: n/a	I want to use a single ODE for the Mach number to compute scramjet combustor with varying area, heat addition, mass addition and friction. But the equation is singular at sonic points and in particular at the thermal choke because the denominator of 1D Mach eq. including a factor (M-1). I don't known how to obtain the location of sonic point and how to do the singular point in 1D Mach equation? One said use L'Hospital law to get the position of sonic point. However, it usually has two sonic points in scramjet combustor. I only get one sonic point with L'Hospital law. Can anyone give me some suggestions?

Posting Rules
You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Trackbacks are Off Pingbacks are On Refbacks are On Forum Rules

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
block-structured mesh for t-junction	Robert@cfd	ANSYS Meshing & Geometry	20	November 11, 2011 05:59
Problem with UDF compiling for kTkLW model	Wantami	FLUENT	0	July 18, 2011 06:11
[Gmsh] Gmsh and samplesurface	touf	OpenFOAM Meshing & Mesh Conversion	2	December 10, 2007 03:27
non-dimensional analysis in Fluent	Endee	FLUENT	8	September 7, 2005 17:16
CFX4.3 -build analysis form	Chie Min	CFX	5	July 13, 2001 00:19

All times are GMT -4. The time now is 21:20.