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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"supersonic inlet"”.
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Fan noise reduction from a supersonic inlet
… investigate the radiation of fan noise through a supersonic inlet. A scaled-down model of an axisymmetric, mixed-compression, supersonic inlet (P-inlet) was used in conjunction with a 10.4 cm (4.1 in) diameter turbofan engine simulator as the noise source. The tests were conducted at an outdoor …
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Aeroacoustics of the bifurcated 2D supersonic inlet
… and acoustic performance of the bifurcated 2D supersonic inlet during takeoff and approach flight conditions, and to compare these results indirectly to those of the axisymmetric supersonic inlet. The comparison is not direct since the centerbody position of the bifurcated 2D inlet is set at …
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Preliminary experiment and analysis of supersonic inlet buzz
The inlet buzz phenomenon was investigated experimentally and analytically. An external-compression axisymmetric inlet model, having 74 mm in cowl lip diameter, was tested in the 229x229 sq mm blowdown wind tunnel at Mach 2.4. The test facility has shown potential for the supersonic inlet research. …
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Reduced fan noise radiation from a supersonic inlet
… the aerodynamic and acoustic performance of a supersonic inlet with a modified auxiliary door geometry. A 1/14 scale model of an axisymmetric, mixed-compression, supersonic inlet designed for civil transportation was used in conjunction with a 10.4cm (4.1 in.) turbofan engine simulator to test …
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UNSTEADY PRESSURE MEASUREMENTS IN A SUPERSONIC INLET DURING UNSTART SIMULATIONS
Unsteady pressure behavior during inlet unstart is a critical factor in understanding the performance and stability of supersonic systems. This thesis will investigate the unsteady pressure measurements within a supersonic inlet during unstart. By using a model developed by Ben Nikaido, Kulites …
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Dynamic characterization and active control of unstarts in a near-isentropic supersonic inlet
A near-isentropic supersonic inlet, at Mach 2.2, has been designed to give enhanced recovery and thus increased range for a supersonic transport aircraft. In such a design a mixed compression inlet design is typically used. Enhanced recovery of 97% in total pressure is achieved by reducing the …
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Experimental investigation of a 2 1/8"-diameter constant-area aerothermopressor with supersonic inlet
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1955.
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Design and development of a rectangular supersonic wind tunnel facility for the study of shock/boundary layer interactions
… work of this thesis was part of the low-boom supersonic inlet project conducted by NASA, Gulfstream Aerospace Corporation, Rolls-Royce, and the University of Illinois. The low-boom supersonic inlet project itself was part of a new supersonic business jet design. The primary goal of the …
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Effect of struts on aeroacoustics of axisymmetric supersonic inlets
… on the aerodynamic and acoustic performance of a supersonic inlet. The investigated inlet was a prototype 1/14 scale model of a mixed compression, axisymmetric supersonic inlet designed for the high speed civil transport aircraft. A 10.4 cm (4.1 in.) turbofan engine simulator was used in …
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Noise Reduction in an Axisymmetric Supersonic Aircraft Inlet using Trailing Edge Blowing
… anechoic chamber with a 1/14th scale model of a supersonic aircraft engine inlet using Trailing Edge Blowing (TEB) to reduce the engine fan noise from a turbofan propulsion simulator (TPS). The TPS is 4.1 in. (10.4 cm) in diameter and is powered by compressed air. The supersonic inlet is …
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Testing and development of a shrouded gas turbine engine in a freejet facility
… the ramjet section providing the thrust in the supersonic regime exists. The combined cycle engine (CCE) could be incorporated into a variety of applications. The building of a new freejet facility and engine test rig at the Naval Postgraduate School enabled dynamic testing of the ongoing …
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A Cartesian finite-volume method for the Euler equations
… methodologies developed. Computations for supersonic flow over a flat plate with an impinging shock wave are used to verify the numerical algorithm, without geometric considerations. The supersonic flow over a blunt body is utilized to show the accuracy of the non-body-fitted Cartesian …
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Comparison of the aeroacoustics of two small-scale supersonic inlets
… investigation was performed on two small-scale supersonic inlets to determine which inlet would be more suitable for a High Speed Civil Transport (HSCT) aircraft during approach and takeoff flight conditions. The comparison was made between an axisymmetric supersonic P inlet and a bifurcated …
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One Dimensional Analysis Program for Scramjet and Ramjet Flowpaths
… scramjet flow path into four major components: inlet, isolator, combustor, and nozzle. The inlet module provides two options for supersonic inlet one-dimensional calculations; a correlation from MIL Spec 5007D, and a kinetic energy efficiency correlation. The kinetic energy efficiency …
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The effects of micro-vortex generators on normal shock wave/boundary layer interactions
… in the design and performance of internal supersonic and transonic flow fields such as engine inlets. This investigation was undertaken to study the effects of passive flow control devices on normal shock wave/boundary layer interactions in an effort to gain insight into the physics that …