Experimental investigation of nonstationary flow in cavities in a supersonic flow

Antonov, A. N.; Shalaev, S. P.

doi:10.1007/bf01409828

Cited by 2 publications

(4 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The numerical simulation and experimental investigation of cylinder with cavity past flow for 0.3 L/D 1.6 are performed in the present work. The present investigations corroborate and explain the measurements reported by Antonov and Shalaev [1].…”

Section: Introductionsupporting

confidence: 93%

“…It is well known that supersonic flow around bodies with cavities located on the nose is accompanied by pulsation [1][2][3]. A forward-facing cavity may be regarded as a resonance tube.…”

Section: Introductionmentioning

confidence: 99%

“…Here a 0 is the speed of sound in the cavity, based on stagnation temperature, L * is the axial distance from the cavity base to the mean shock position, L + δ. In equation (1), it is assumed that the flow velocity in the tube, or cavity, is small, so that the stagnation temperature can be used to estimate the average speed of sound.…”

Section: Introductionmentioning

confidence: 99%

“…Antonov and Shalaev [1] investigated the flow around the cylinder with a cavity in the Mach 2.9 wind tunnel, but for intermediate cavity lengths, 0.4 L/D 0.7, two modes of oscillation were not observed. The numerical simulation and experimental investigation of cylinder with cavity past flow for 0.3 L/D 1.6 are performed in the present work.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Numerical and Experimental Investigation of Cylinder Cavity Flows

Bazyma

Kuleshov

2007

Proceedings of the Institution of Mechanical Engineers, Part G:

View full text Add to dashboard Cite

It is well known that supersonic flow around bodies with cavities located on the nose is accompanied by pulsation. A forward-facing cavity may be regarded as a resonance tube. The flow in forward-facing cavities have been the subject for many experimental and numerical investigations. However, the majority models used in their experiments were blunt, hemispherical nose pieces with an axial cylindrical cavity of variable depth. In general, the cavity resonated at the primary-mode frequency, and the bow shock oscillated in a stable, symmetric manner about the nose. However, for intermediate cavity lengths, 0.4 ≤ L/D ≤ 0.7, the pressure signal switched randomly between the two modes of oscillation. The numerical and the experimental research of a supersonic flow past the cylinder with a cavity is carried out in the given work. Relative depth of a cavity ( L/D, D-cylinder diameter) varied in a range from 0.3 up to 1.6. Experiments for Mach number M = 3, Reynolds number Re > 106 and two-, three-dimensional numerical modelling were carried out. Shock wave bimodal pulsations have been experimentally found for depth of a cavity L/D = 0.4. Comparison of the experimental and numerical data has shown their good conformity.

show abstract

Section: Introductionsupporting

confidence: 93%

“…It is well known that supersonic flow around bodies with cavities located on the nose is accompanied by pulsation [1][2][3]. A forward-facing cavity may be regarded as a resonance tube.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical and Experimental Investigation of Cylinder Cavity Flows

Bazyma

Kuleshov

2007

Proceedings of the Institution of Mechanical Engineers, Part G:

View full text Add to dashboard Cite

show abstract

Interaction between axial and annular jets leaving a cylindrical cavity and an incoming supersonic gas flow

Bazyma¹

1995

J Appl Mech Tech Phys

View full text Add to dashboard Cite

Many researchers have studied pressure pulsations that arise in jets, separated flows, and bottom flows. Certain investigations devoted to oscillatory processes in Hartmann resonators were discussed in [1]. Such processes have been modeled by the method of coarse particles, the Chudov-Roslyakov finite-difference scheme, the Godunov-Kolgan scheme, and other methods.In an experiment conducted in [2], stable pressure pulses were obtained in a supersonic flow past a hollow cylindrical body (cylinder) with its open end facing the incoming flow. In [3], the experimental data obtained in [2] was compared with results calculated on the basis of kinetically consistent difference schemes. Good agreement was obtained with the experimental data within the region of Reynolds numbers Re~ _> 105, where the effect of Rer on the main characteristics of the process (mean shock-wave decay, amplitude of shock-wave pulsations, period of oscillation, standard deviations of the pressure pulsations) is negligible.Here, we use the Godunov method to examine the problem of the supersonic flow of an inviscid gas past hollow cylindrical bodies. It is shown numerically that it is possible to control oscillatory flow regimes by the injection of gas from the bottom of the cavity.1. We will examine the flow of an ideal gas with the Mach number M~. = 3.7 about a cylinder (Fig. 1). The geometric characteristics of the cylinder (//D = 1.6, 6/D = 0.04) are the same as in [2, 3].The equations of gas dynamics are as follows in the cylindrical coordinate system [4] Opr (gpur Opvr ot +--g~ + 0--7 -=0,where p is pressure; p is density; u and v are components of the velocity vector along x and r (we assume that the component associated with the angle ~o is equal to zero); e is the total energy of a unit mass of the gas; t is time. The system is closed by the equation of state of an ideal gas. The quantities were converted to dimensionless form as follows:r=~D/2, x=s t=tD/2aoo, a=aaoo, u = ftaoo, v = ~aoo, P = PPoo, P = ~pooa~ (a~. is sonic velocity in the incoming flow and D is the diameter of the cylinder (see Fig. 1)).Kharkov Aviation Institute, 310111 Kharkov.

show abstract

Experimental investigation of nonstationary flow in cavities in a supersonic flow

Cited by 2 publications

References 1 publication

Numerical and Experimental Investigation of Cylinder Cavity Flows

Numerical and Experimental Investigation of Cylinder Cavity Flows

Interaction between axial and annular jets leaving a cylindrical cavity and an incoming supersonic gas flow

Contact Info

Product

Resources

About