Unsteady supersonic flow past a sphere moving through a thermal inhomogeneity

Golovachev, Yu. P.; Leont'eva, N. V.

doi:10.1007/bf01075169

Cited by 1 publication

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the interaction between the reflected compression wave and the contact boundary the hot-gas region is intensively compressed both for a spherical temperature inhomogeneity and for a plane layer of hot gas (the velocity has a maximum at ~ -0.5). A similar observation was made in [6]. The interaction may be accompanied by the initiation of a short-lived reversed flow region.…”

Section: Shock Layer Dynamics For Unsteady Interaction With a Finite supporting

confidence: 66%

“…Curve 4 was calculated with twice the usual number of grid points in both directions. The axisymmetric flow upstream of a sphere moving through a plane region of gas with normal density distribution was studied in [6]. To make a correct comparison, it was necessary to repeat the calculations made in [6] for a uniform density distribution.…”

Section: Shock Layer Dynamics For Unsteady Interaction With a Finite mentioning

confidence: 99%

See 1 more Smart Citation

Unsteady interaction of a sphere with atmospheric temperature inhomogeneity at supersonic speed

Georgievskii¹,

Левин²

1993

Fluid Dyn

View full text Add to dashboard Cite

The structure of the shock layer and the abrupt aerodynamic forces acting on a sphere moving in an atmosphere with inhomogeneous inclusions of various shapes are considered.Inhomogeneities of the medium, through which a body moves at supersonic speed, can produce considerable changes in the shape and structure of the leading shock wave. The motion of a sphere through a plane inhomogeneity was studied in various aerodynamic formulations in [1--8]. In [1--3] the problem of the penetration of blunt axisymmetric bodies (sphere-cone, sphere, and cylinder end-face) into gases with different aerodynamic properties was investigated using the Euler equations (the interaction with the shock wave was simulated). The flow in the vicinity of the stagnation streamline was considered in [4], with chemical relaxation behind the shock wave taken into account. The experimental results of [5] concern the flow past a smooth duralumin sphere moving at a speed of 1.98 kin/see through a region of heated air. In [6] a viscous shock layer model was applied to the axisymmetric flow upstream of a sphere moving through a high-temperature region. Inviscid non-heat-conducting supersonic flow through a medium with periodic stratified temperature inhomogeneity was numerically investigated in [7]. Threedimensional air flow with nonequilibrium reactions past a body entering a heated half-space was considered in [8].Hence considerable knowledge has been accumulated concerning the interaction between differently shaped bodies and plane inhomogeneities. However, closed (spatial) inhomogeneities of various kinds can also be created in the atmosphere. Plane shocks, passing through such regions, were studied experimentally and theoretically in [9--13].In [9] experimental data on a gas-dynamic pulse with a shock front passing through the decaying plasma of an electrodeless microwave discharge in air at medium pressure are given. Shock waves passing through the weakly ionized plasma of a laser spark late in its development in air at atmospheric pressure were experimentally studied in [10]. The shock wave was said to be eagerly absorbed in the "fireball" region. In [11] it was demonstrated that during the interaction of a shock wave with the hot region of a laser spark the shock wave front is accelerated and deformed due to the lens effect and then recovers, so that complete absorption of the shock wave [10] does not take place.The interaction of a plane shock wave with a spherical volume of hot gas was numerically investigated in [12] for the Reynolds number Re=50 using the complete Navier--Stokes equations. In practice, this problem corresponds to the interaction of shock waves with the hot gas cloud ejected by a volcano. The interaction of shock waves with spatial inhomogeneities of various shapes in an inviscid non-heat-conducting gas was numerically studied in [13]. In particular, the interaction of a plane shock wave with a cylindrical region of gas with relaxation was studied (in a model formulation). The interactions of a shock wave with a reactin...

show abstract

Section: Shock Layer Dynamics For Unsteady Interaction With a Finite supporting

confidence: 66%

Section: Shock Layer Dynamics For Unsteady Interaction With a Finite mentioning

confidence: 99%

Unsteady interaction of a sphere with atmospheric temperature inhomogeneity at supersonic speed

Georgievskii¹,

Левин²

1993

Fluid Dyn

View full text Add to dashboard Cite

show abstract

Unsteady supersonic flow past a sphere moving through a thermal inhomogeneity

Cited by 1 publication

References 0 publications

Unsteady interaction of a sphere with atmospheric temperature inhomogeneity at supersonic speed

Unsteady interaction of a sphere with atmospheric temperature inhomogeneity at supersonic speed

Contact Info

Product

Resources

About