Global ETD Search
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Showing 1 to 6 of 6 for “"Jet Shear Layer"”.
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An Investigation of the Irrotational Near Field of an Excited High Speed Jet.
The near-field pressure of a Mach 0.9 jet with Reynolds number of 6.2x10^5 has been investigated to examine the response of the jet to low-frequency forcing with localized arc filament plasma actuators (LAFPAs). The well-defined actuation phase allows for the phase averaging of the near-field …
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The Turbulence Structure of Heated Supersonic Jets with Offset Total Temperature Non-Uniformities
… aircraft on communities. The overarching goal of jet noise research is to optimize noise reduction techniques for supersonic jets. In order to achieve this, a more complete theoretical framework which links the jet boundary conditions to the turbulence production in the jet plume and the far-field …
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Global stability and control of swirling jets and flames
… diffusion flames. In a non-swirling lifted jet diffusion flame, two modes of global instability are found. The first mode is a high-frequency mode caused by the instability of the low-density jet shear layer in the premixing zone. The second mode is a low-frequency mode caused by an …
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Experimental Study of the Effect of Dilution Jets on Film Cooling Flow in a Gas Turbine Combustor
… from the interaction of high momentum dilution jets required to mix the fuel with effusion film cooling jets that are intended to cool the combustor walls. The dilution and film cooling flow have different performance criteria, often resulting in conflicting flow mechanisms. The purpose of this …
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Study of High-speed Subsonic Jets using Proper Orthogonal Decomposition
… between the turbulent structures in the mixing layer of transonic jets issued through baseline axisymmetric conical nozzle and ones with chevrons. The analysis is done using flow velocity data obtained through Particle Image Velocimetry (PIV). Two chevron nozzles with penetration levels at 2% …
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Fundamental physics and application of plasma actuators for high-speed flows
… energy was also applied to a sonic transverse jet in a supersonic cross flow. Lastly, the particle image velocimetry diagnostic was considered and a technique developed to evaluate measurement uncertainty and using experimental velocity data to solve for density from the continuity equation. In …