Effect of divergence on the inviscid spatial stability of an axisymmetric jet, with or without swirl

Thesis/Dissertation · Sun Jan 01 00:00:00 EST 1984

OSTI ID:5145450

Azar, K

The effect of divergence on the inviscid spatial stability of an axisymmetric jet flow, with or without swirl, for a hyperbolic tangent axial-velocity profile and the Lamb vortex swirl profile was investigated and the results are presented. The solution is based upon the perturbation of a slowly divergent jet. Thus, the theory of the linear hydrodynamic stability of parallel flow is extended to include the effect of divergence on the stability of the jet. In order to obtain the stability parameters, the Navier-Stokes and the continuity equations in the cylindrical coordinate system are employed. By introducing wavy disturbances into the aforementioned equations and ignoring the nonlinear terms, the linearized equations in terms of the disturbances are obtained. The results presented here are for axisymmetric and non-axisymmetric disturbances when the frequency, divergence factor, and the swirl intensity are varied. The results indicate that at a large divergence factor, disturbances are generally more stable. Also, more stable disturbance is observed when the swirl intensity and the frequency are increased.

• Research Organization: Connecticut Univ., Storrs (USA)
• OSTI ID: 5145450
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
PLASMA JETS
VORTEX FLOW
NAVIER-STOKES EQUATIONS
STABILITY
HYDRODYNAMICS
DIFFERENTIAL EQUATIONS
EQUATIONS
FLUID FLOW
FLUID MECHANICS
MECHANICS
PARTIAL DIFFERENTIAL EQUATIONS
640420* - Fluid Physics- Properties & Structure of Fluids- (-1987)