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Showing 1 to 20 of 123 for “"Inlets"”.
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Turbulence modeling in hypersonic inlets
A study is conducted to analyze the performance of different turbulence models when applied to flow through a Mach 7.4 hypersonic inlet. The analysis, which is two-dimensional, is done by comparing computational results from a Parabolized Navier Stokes code, with experimental data. The McDonald …
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Evaluation and Enhancement of the Performance of Drop Inlets
There are numerous drop inlet (DI) structures installed along U.S. Highway 50 in the Clear Creek Drainage Basin near Carson City, Nevada which are maintained by the Nevada Department of Transportation (NDOT). The maintenance requirements can be significant since large quantities of traction sand …
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An experimental investigation of flow control for supersonic inlets
… layer interactions (SWBLIs) in supersonic inlets. The overall aim of this study is to determine to what extent vortex generators (VGs) can mitigate flow separations within supersonic inlets. To achieve this, an experimental investigation was undertaken in a small-scale wind tunnel, because …
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Measurements of Flow in Boundary Layer Ingesting Serpentine Inlets
… boundary layer ingesting (BLI) serpentine inlets to provide the needed air ow to the engine. These inlets produce distorted flow profiles that can cause aeromechanical, stability, and performance changes in embedded engines. Proper design of embedded engine systems requires understanding of …
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Effect of struts on aeroacoustics of axisymmetric supersonic inlets
A study was conducted to determine the effect of strut position 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 …
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Comparison of the aeroacoustics of two small-scale supersonic inlets
… 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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Hydraulic efficiency of grate and curb inlets for urban storm drainage
… through networks comprised of streets, gutters, inlets, storm sewer pipes, and treatment facilities. Objectives of this research program included evaluating the hydraulic efficiency of three storm-drain inlet types and developing design methodology. Denver Type 13 and 16 grate inlets and Colorado …
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A Numerical Evaluation of Hypersonic Inward-Turning Inlets at Off-Design Conditions
… susceptibility of hypersonic, inward-turning inlets to performance losses at off-design conditions is explored. Axisymmetric, inward-turning inlets were designed for Mach 6, and the inlet performance was evaluated from computational fluid dynamics (CFD) simulations. These inlets were run at a …
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Transverse Variability of the Flow and Density in Inlets of Southern Chile
… describe the flow transverse structure in three inlets of southern Chile. The inlets show marked differences in their transverse dynamics in response to external forcing. In Aysen Fjord (45.2°S) the mean flow showed a three layer structure that was consistent with up-fjord wind-induced exchange, …
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Design and characterization of robust hot film sensors for tactial aircraft inlets
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2002.
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Particle Sensing in Gas Turbine Inlets Using Optical Measurements and Machine Learning
Propulsion systems are exposed to a variety of foreign objects that can significantly damage or impact their performance. These threats can range from severe dangers such as sandstorms and volcanic eruptions, which can induce engine failure in minutes, to condensation and moisture during ground …
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Hydrodynamics, sediment transport and morphodynamics at inlets and river mouths: a numerical investigation
Inlets and river mouths are among the most important coastal zones in terms of their economic, ecological and societal values. However, our current predictive capability on the hydrodynamics, sediment delivery and morphological evolution of inlets and river mouths remains qualitative. The …
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Effects of compressor face boundary conditions on the dynamic behavior of supersonic inlets
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1996.
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High-fidelity reduced-order aerodynamic models : application to active control of engine inlets
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2002.
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Propulsion system analysis for conceptual design: drag and losses of nozzles and mixed compression inlets
… installation losses for mixed compression inlets and a study of advanced technology nozzles. The new computational techniques have been created to predict drag and total pressure recovery for both axisymmetric and 2-D mixed compression inlet configurations. These inlets are designed for use …
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Modeling the Effects of Low-Pressure Atmospheric Fronts on Sediment Transport through Mississippi Sound Barrier Island Inlets
… on sediment flux through six barrier island inlets in the Mississippi Sound.</p> <p>A high-resolution application of the Regional Ocean Modeling System with the Community Sediment Transport Modeling System was developed to simulate tidal circulation, wind-driven currents, and sediment …
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The Effect Of Tidal Inlets On Open Coast Storm Surge Hydrographs: A Case Study Of Hurricane Ivan (2004)
… hydrographs for coastal waters surrounding tidal inlets along the coast of Florida. These hydrographs are used as open ocean boundary conditions for local bridge scour models. At present, very little information is available on the effect that tidal inlets have on these open coast storm tide …
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Assessment of an Innovative Experimental Facility for Testing Diffusing Serpentine Inlets with Large Amounts of Boundary Layer Ingestion
… for testing flush-mounted, diffusing serpentine inlets intended for use on blended-wing-body aircraft. The static ground test facility was able to simulate the boundary layer profile expected to be ingested by inlets mounted on the aft sections of these aircraft. It generated Mach numbers ranging …
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Hydrodynamic controls on multiple tidal inlet persistence
The importance of the persistence of multiple inlets in coastal systems is fundamental for issues such as water quality, navigability, and beach/barrier stability. In long embayments, having extended residence times, the stability of multiple inlets can be important for more efficient flushing and …
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Inlet drag prediction for aircraft conceptual design
… the drag of subsonic and supersonic pitot inlets, fixed- and variable-geometry conical inlets, and two-dimensional supersonic inlets. Even though the requirement of computational efficiency has necessitated that many simplifications be made in the analysis, the drag calculations have a …
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