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Showing 1 to 20 of 101 for “"Supersonic flow"”.
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Flutter of laminated plates in supersonic flow
… is that given by linear piston theory with flow at arbitrary cross-flow angles. Flutter solutions were obtained for typical symmetric, angle-ply, and general laminated composite plates, and a limited parametric study was conducted. The parameters studied include the number, orientation, and …
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Combined tangential-normal injection into a supersonic flow
… and normal air injection into a Mach 3 airflow was experimentally studied. A rearward facing slot producing tangential injection at a nominal Mach number 1.7 was operated at several different total pressures. An array of transverse tubes of height equal to the slot height and placed just …
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Characterization of Microwave Cavity Discharges in a Supersonic Flow
… must be determined. Detailed characterization of supersonic flowing discharges is important to many applications in aerospace and aerodynamics. One application is the use of plasma-assisted hydrogen combustion devices to aid in supersonic combustion. In conditions close to the real combustion …
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Numerical Simulation of Injection and Mixing in Supersonic Flow
… of two candidate designs for injection into supersonic flow, including a comparison of two renormalized group theory (RNG) based k-epsilon turbulence models with a more conventional k-epsilon model. The chosen designs were an unswept ramp injector with four injection ports and a novel …
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Fuel-vortex interactions for enhanced mixing in supersonic flow
… investigation was conducted to compare the supersonic mixing performance between a novel aerodynamic ramp injector and a physical ramp injector. The aerodynamic ramp injector consisted of nine, flush-wall jets arranged to produce multiplicative fuel-vortex interactions for mixing enhancement …
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A study of supersonic flow past vibrating shells and cascades
Supersonic flow past oscillating cylindrical shells and oscillating flat-plate cascades is analyzed using linearized characteristics methods. Pressure distributions and generalized aerodynamic forces are computed for arbitrary radius to length ratios, axial and circumferential wave numbers, Mach …
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Nonsteady Transonic and Supersonic Flow About Slender Bodies of Revolution
Made available in DSpace on 2014-12-05T20:34:22Z (GMT). No. of bitstreams: 1 6104384.pdf: 1493541 bytes, checksum: 2a5ec8478c46e2a44048357c1fe0aa9b (MD5) Previous issue date: 1961
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New efficient contact discontinuity capturing techniques in supersonic flow simulations
… triple point problem and underexpanded nozzle flow. Underexpanded nozzle flow involves complex interaction of free surface, shock waves and slip lines. Traditional high-order schemes smear the contact surfaces preventing accurate definition of the flow structure inside the jet. However, using a …
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A Sampling Probe for Fluctuating Concentration Measurements in Supersonic Flow
The study of mixing processes in supersonic flow has a great interest for a number of applications including scramjet developments. However, the usual tools employed are very limited. Sampling probes generally have a poor frequency response, and that makes measurements of fluctuating concentration …
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Ignition and flameholding in supersonic flow by injection of dissociated hydrogen
… free radicals for ignition and flameholding in supersonic flows. An analytical investigation of the effects of adding small quantities of radicals to a stoichiometric mixture of hydrogen and air was performed using a finite-rate chemical kinetics code. The results of these calculations indicate …
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Supersonic flow field visualization studies of the MÅ = 6 price waverider planform
Supersonic tests of the conical flow derived MÅ Ê» = 6 (design) Price waverider planform were conducted using the Naval Postgraduate School wind tunnel. These tests are part of a continuing effort to study the characteristics of waverider configured vehicles. Two sting-mounted, flat-plate …
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Control of acoustics and store separation in a cavity in supersonic flow
The supersonic flight community is currently faced with two cavity-under-cross-flow related problems, one being the high noise levels inside the cavity and the other being the return of a store into the cavity after being released from inside. This thesis provides a systematic framework to …
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Oscillating shock impingement on low-angle gas injection into a supersonic flow
… underexpanded, sonic helium jet injected into a supersonic airflow. Information on mixing, penetration, total pressure loss and turbulence structure from these experiments was used to estimate mixing control achieved by adding an oscillating shock to the helium injection flow field. Tests were …
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Nonlinear flutter of composite shear-deformable panels in a high-supersonic flow
… flat, composite panel subjected to a high supersonic flow is analyzed. The structural model considers a higher-order shear deformation theory which also includes the effect of the transverse normal stress and satisfies the traction-free condition on both faces of the panel. The possibility …
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An experimental investigation of the effects of base bleed in axisymmetric supersonic flow
… drag. The effects of base bleed on the near-wake flowfield of a cylindrical afterbody in a Mach 2.5 flow have been investigated in the present study. This experimental study is aimed at better understanding the complex fluid dynamic interactions occurring in the near-wake due to base bleed and is …
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Simultaneous direct measurements of skin friction and heat flux in a supersonic flow
… and the mechanical characteristics of the air flow. Tests were conducted in the Virginia Tech supersonic wind tunnel. The nominal Mach number was 2.4, and Reynolds number per meter was 4.87 x 10⁷ with total pressure of 5.2 atm and total temperature of 300 °K. Results of the tests showed that …
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Experimental investigation of helium injection at a low downstream angle into supersonic flow
… and total pressure loss when injected into a supersonic air cross flow. From this information, the performance of these jets as fuel injectors in a supersonic combustion ramjet (scramjet) combustion chamber was estimated. Both injection angle jets were made flush to the wind tunnel wall. The …
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Characterization and Analysis of Supersonic Flow Through De Laval Nozzles at Varied Design Conditions
… numerical and experimental investigation of supersonic planar nozzles under different design conditions has been conducted. Supersonic planar nozzles are common geometries observed in supersonic wind tunnels and aircraft or rocket engines. For the important role they play in wind tunnel …
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Experimental investigation of normal, sonic injection through a wedge-shaped nozzle into supersonic flow
… The expansion ratio and the mass rate of flow of both nozzles were matched in order to determine the effect of the geometric difference only. 'Decay rate, penetration, and jet area growth rate were used to compare the mixing performance of the nozzles. Oil flow photography was used to …
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