DEAR SIR, It is doubtful whether great practical importance can be attached to the precise location of the sonic section in a de Laval nozzle with friction present, under the assumptions of the one-dimensional theory of flow. The truth of the matter, however, is that the equations of this approximation do lead to the conclusion that the condition of M 1, where M is the Mach number, prevails in the throat of a convergent-divergent nozzle only in the limiting case of no friction, contrary to Mr Spalding's assertion in the August issue of AIRCRAFT ENGINEERING. It can occur in a section for which dA/dx 0 only if that section is at the exit of a convergent nozzle.
Critical Flow Through Convergent-Divergent Nozzles
Further Correspondence on a Highly Controversial Subject of Great Theoretical Importance
Aircraft Engineering and Aerospace Technology ; 23 , 10 ; 305-307
1951-10-01
3 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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