Reducing the wave drag of bodies in supersonic flows using porous materials

Фомин, В. М.; Mironov, S. G.; Serdyuk, K. M.

doi:10.1134/s1063785009020060

Cited by 36 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One possible version of direct control of the flow around blunted bodies is the use of the frontal gas-permeable porous insert. The flow around the frontal insert made of a high-porosity cellular material and placed on the frontal face of a blunted body leads to the formation of an effective pointed body owing to the difference in hydraulic resistances of the central and peripheral layers of the porous material and to significant (within 40%) reduction of the wave drag of the cylinder in a supersonic flow [10].…”

Section: Figure 1 Permeable Highly Porous Cellular Materials (Hpcm): mentioning

confidence: 99%

“…The normalized length of the porous insert x/D was varied within 0.2 3.1. The model was mounted on a three-component strain-gauge balance, which measured the drag force generated by the model [10]. Numerical simulations were performed also by using the skeleton model of a porous medium in the form of square or rectangular elements swirled around the longitudinal axis of the model [14].…”

Section: Supersonic Flow Around a Cylinder With A Gas-permeable Poroumentioning

confidence: 99%

See 1 more Smart Citation

Numerical simulation of highly porous materials in application to supersonic aerodynamics

Poplavskaya

Kirilovskiy

Mironov

et al. 2017

AIP Conference Proceedings

Self Cite

View full text Add to dashboard Cite

Abstract. Within the framework of the skeleton model of a porous medium, numerical simulation of two tasks was performed: task of the absorption of acoustic disturbances at hypersonic flow past a plate with a porous insert taking into account the real properties of the gas and task of a supersonic flow around a streamwise aligned cylinder with a frontal insert from cellular porous nickel. It is shown that high porous cellular materials can effectively be used in supersonic aerodynamics.

show abstract

Section: Figure 1 Permeable Highly Porous Cellular Materials (Hpcm): mentioning

confidence: 99%

Section: Supersonic Flow Around a Cylinder With A Gas-permeable Poroumentioning

confidence: 99%

Numerical simulation of highly porous materials in application to supersonic aerodynamics

Poplavskaya

Kirilovskiy

Mironov

et al. 2017

AIP Conference Proceedings

Self Cite

View full text Add to dashboard Cite

show abstract

“…Supersonic flow past permeable screens (grids, perforated plates, lattices and so on) is of interest in many technological applications [1][2][3][4][5], as well as in the problems of analysis of certain natural phenomena such as gas dynamics of splintering of disintegrating meteoroids and other [6][7][8]. The formulation of the adequate boundary conditions on the surfaces of a strong gas dynamic discontinuity that simulate the permeable screens [9,10] is of fundamental value.…”

mentioning

confidence: 99%

Hysteresis in Supersonic Flow Past a Plane Cascade of Cylindrical Rods

Guvernyuk

Maksimov

2021

Fluid Dyn

View full text Add to dashboard Cite

Abstract— The results of numerical simulation of the interaction of supersonic flow with a permeable screen in form of an infinite plane cascade (lattice) of circular cylinders are given. The interaction regime in which the shocks ahead of the cylinders are localized on the scale of the cascade step is considered. The multi-block computational technique in which the viscous boundary layers are resolved by means of local grids using the Navier–Stokes equations, while the effects of inteferrence between the shock-wave structures in supersonic wake are described within the framework of Euler’s equations. The action of shock waves induced by the neighboring elements of lattice to the near-wake region behind the intermediate elements can ambiguously affect the aerodynamic lattice performance as well as generate time-dependent phenomena in the wake. The flow regimes are classified depending on continuous increase and decrease in the free-stream supersonic air flow in the Mach number range from 2.4 to 4.2 with reference to the lattice of the 80% permeability. The sources of the hysteresis behavior of the lattice aerodynamic drag with respect to the Mach number and the mechanisms of the onset of self-oscillating wake flow regimes are discussed.

show abstract

“…Experimental studies in wind tunnels demonstrated the possibility of controlling supersonic flow and, in particular, controlling the aerodynamic drag of bodies by help of gas permeable highly porous cellular materials (HPCM) [1,4].HPCM ( Figure 1a) is formed when the foamed liquid metals solidify. The cellulars of the frozen foam form a spatial carcass from the partitions between the contacting cellulars.…”

Section: Introductionmentioning

confidence: 99%

“…Gas-permeable porous materials in recent years have found application in promising methods of controlling supersonic aircraft [1][2][3]. Experimental studies in wind tunnels demonstrated the possibility of controlling supersonic flow and, in particular, controlling the aerodynamic drag of bodies by help of gas permeable highly porous cellular materials (HPCM) [1,4].HPCM ( Figure 1a) is formed when the foamed liquid metals solidify.…”

Section: Introductionmentioning

confidence: 99%

Simulation of a supersonic flow around a body with a frontal gas-permeable insert by using a skeleton model of a highly porous cellular material

Poplavskaya

Kirilovskiy

Mironov

2017

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Abstract. Numerical simulation of supersonic flow past a cylinder with a frontal gas-permeable insert is performed using the skeleton model of a highly porous cellular material. Numerical simulation was carried out within the framework of two-dimensional RANS equations written in an axisymmetric form. The skeleton model is a system of coaxial rings of different diameters, arranged in staggered order. The calculations were carried out in a wide range of determining parameters: Mach numbers M ∞ =3, 4.85 and 7, unit Reynolds numbers Re 1 =13.8×10 5 ÷ 13.8×10 6 m -1 , the cylinder diameter 6÷40mm, the length of the porous insert 3÷45mm, the cell diameter of 1 and 3 mm. The results of the calculations are consistent with the available experimental data. The applicability of the skeleton model for the description of supersonic flow around axisymmetric bodies with front inserts from cellular-porous materials is shown. IntroductionGas-permeable porous materials in recent years have found application in promising methods of controlling supersonic aircraft [1][2][3]. Experimental studies in wind tunnels demonstrated the possibility of controlling supersonic flow and, in particular, controlling the aerodynamic drag of bodies by help of gas permeable highly porous cellular materials (HPCM) [1,4].HPCM ( Figure 1a) is formed when the foamed liquid metals solidify. The cellulars of the frozen foam form a spatial carcass from the partitions between the contacting cellulars. The porosity (the ratio of the total volume of the porous sample to the volume of the skeleton) of such a material lies in the range from 76% to 98%. The material ceases to be gas permeable with less porosity, and with greater porosity, a skeleton of the partitions is not formed. There are some recent applications of gas-permeable porous materials and in supersonic aerodynamics to suppress acoustic waves. In particular, it was possible to suppress acoustic disturbances in the shock layer on a plate in nitrogen stream at M = 21 with the help of inserts of foamed nickel in experiments [5]. These phenomena are based on dissipation of the energy of acoustic disturbances, which are a dominating mode of instability of a hypersonic boundary layer, owing to friction in pores of the coating. It was shown in experiments [6] that the intensity of perturbations is attenuated by a sound-absorbing coating from the HPCM by 20% at the plate in the flow of vibrationally excited mixtures of CO 2 with air.To increase the efficiency of the action of gas-permeable porous materials on a supersonic flow around various bodies and develop engineering methods for design of supersonic flying vehicles with porous control elements it is required to apply modern methods of numerical simulation of flow around bodies with porous inserts. At present, the main problem of numerical modeling is the optimal choice of the model of a gas permeable porous medium. Continuum models of a porous medium with a prescribed pressure gradient in the porous region as a function of the filtration rate in ac...

show abstract

Reducing the wave drag of bodies in supersonic flows using porous materials

Cited by 36 publications

References 0 publications

Numerical simulation of highly porous materials in application to supersonic aerodynamics

Numerical simulation of highly porous materials in application to supersonic aerodynamics

Hysteresis in Supersonic Flow Past a Plane Cascade of Cylindrical Rods

Simulation of a supersonic flow around a body with a frontal gas-permeable insert by using a skeleton model of a highly porous cellular material

Contact Info

Product

Resources

About