Transonic aerodynamics is the focus of strong interest at the present time because it is known to encompass one of the most efficient regimes of flight. While current transport aircraft operate just below the speed of sound, more radical aerodynamic designs, such as R. T. Jones’ proposal for a yawed wing in [1], favor operation at low supersonic speeds in the range from Mach 1 to 1.3 (a regime ...

Abstract The article presents the results of a numerical study unsteady vortex motion gas arising over conical body with segmental bottom surface for various angles attack in subsonic flow regime. simulation is based on viscous compressible model (Navier–Stokes model). For angles, patterns around body, area its conjugation and near wake are presented. Data non-stationary behavior magnitude pres...

This study investigates the accuracy of different numerical schemes OpenFOAM software to simulate compressible turbulent jets. Both pressure-based utilizing implicit PIMPLE algorithm and density-based relying on AUSM scheme explicit Runge-Kutta time integration are considered. The results tests compared validated against data from NASA ARN nozzle geometry. choice parameter setting is discussed ...

Background: There is a growing need to reduce significantly the noise generated by high-performance, supersonic military aircraft. The noise generated during takeoff and landing on aircraft carriers has direct impact on shipboard health and safety issues. Also, noise complaints are increasing as communities move closer to military bases or when there are changes due to base closures and realign...

Experimental and flight data for hypersonic air-breathing vehicles are both difficult and extremely expensive to obtain, motivating the use of computational tools to enhance our understanding of the complex physics involved. One of the major difficulties in simulating this regime is the interaction between combustion and turbulence, both of which are intrinsically complex processes. This work r...

This paper presents results from investigations of chemically reacting flowfields and optical gain profiles in HF chemical laser media by infrared hyperspectral imaging. Subsonic and supersonic chemiluminescent F+H2 reacting flowfields, produced in high-fluence microwave-driven reactors, were imaged at a series of wavelengths, 2.6-3.1 microm, by a low-order, spectrally scanning Fabry-Perot inte...

In this paper, a unified method for the computation of unsteady aerodynamic forces in Laplace domain wing section subsonic, sonic and supersonic potential flows is presented. The subsonic solution new development based on pressure mode method. are evaluated by an efficient computing kernel. flow extension frequency to domain. Analytical expressions coefficient obtained regime. validated these r...

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The article deals with pneumatic and hot wire anemometry measurement on subsonic axi-symmetric air ejector. Performances of the ejector with and without pulsations of primary flow are compared, measuring of characteristic pressures and mass flow rates are performed and ejector efficiency is evaluated. The pulsations of primary flow are produced by a synthetic jet generator, which is placed in t...