Uniqueness and instability of subsonic–sonic potential flow in a convergent approximate nozzle

Uniqueness and Instability of Subsonic–sonic Potential Flow in a Convergent Approximate Nozzle

We proved uniqueness and instability of the symmetric subsonic– sonic flow solution of the compressible potential flow equation in a surface with convergent areas of cross–sections. Such a surface may be regarded as an approximation of a two–dimensional convergent nozzle in aerodynamics. Mathematically these are uniqueness and nonexistence results of a nonlinear degenerate elliptic equation wit...

Transonic Potential Flows in A Convergent–Divergent Approximate Nozzle

In this paper we prove existence, uniqueness and regularity of certain perturbed (subsonic–supersonic) transonic potential flows in a two-dimensional Riemannian manifold with “convergent–divergent” metric, which is an approximate model of the de Laval nozzle in aerodynamics. The result indicates that transonic flows obtained by quasi-one-dimensional flow model in fluid dynamics are stable with ...

Instability of shock-induced nozzle flow separation

We investigate experimentally the causes of jet plume instability and enhanced mixing observed in the exhaust of shock-containing convergent-divergent nozzles. Key features of the internal flow are the separation shock, separation shear layers, and pattern of alternating expansion and compression waves downstream of the shock. We focus on two possible reasons for this instability—the motion of ...

Prediction of Radiation Heat Transfer from Combustion Gases in a Convergent- Divergent Nozzle Using Zoning Method

Prediction of Radiation Heat Transfer from Combustion Gases in a Convergent- Divergent Nozzle Using Zoning Method