Register to reply

Is it possible to have a Mach number greater than 1 at the throat?

by wav3 r1d3r
Tags: greater, mach, number, throat
Share this thread:
wav3 r1d3r
#1
Mar5-12, 05:14 PM
P: 9
I have a problem for my Gas Dynamics homework, in which the problem asks to solve for the Mach number at the throat of a converging-diverging nozzle.

I assumed that the Mach at the throat should be equal to 1 since the professor said it was impossible to have a Mach number greater then 1 at the throat.

After showing the same problem to a Graduate Student I work with he showed me that it is possible to have a Mach number greater then 1 at the throat through the area ratios.

But after speaking to my professor a second time he has again said it is not possible.

So my question is.. is it possible to have a Mach number greater than 1 at the throat.


Oh the conditions for the problem are as follows:
Mi=2
Ai=20 cm^2

Athroat=15cm^2

Shock Area=22 cm^2
Ae=25cm^2

where gamma= 1.4

according to the solutions Mach at the throat equals 1.662


I assumed it was 1 but it was not correct.


If someone could steer me in the right direction I'd appreciate it thanks!
Phys.Org News Partner Science news on Phys.org
Experts defend operational earthquake forecasting, counter critiques
EU urged to convert TV frequencies to mobile broadband
Sierra Nevada freshwater runoff could drop 26 percent by 2100

Register to reply

Related Discussions
Finding the mach number of an aircraft Introductory Physics Homework 3
Why is it when I divide by a number greater than 1, I get a larger number? General Math 2
Mach Number 2 Introductory Physics Homework 3
Mach Number Introductory Physics Homework 3
Zero Mach number lift coefficient Engineering, Comp Sci, & Technology Homework 1