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Showing 1 to 8 of 8 for “"heated jet"”.
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A Numerical and Experimental Evaluation of the Turbulent Heat Flux in a Heated Jet in Crossflow
<p>The injection of fully-developed turbulent heated air from a tube into a cooler turbulent duct flow is examined, as an analogy to film cooled turbine blades. Scale Resolving Simulations (SRS) are used to examine the flow numerically. A Detached Eddy Simulation (DES) methodology is examined but …
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An experimental study of heated jets in a cross-flow from stacks of various geometries
Heated jets in cross-flow (JICFs) occur in a wide variety of situations in engineering practice and the natural environment. Because many industrial and environmental JICFs involve raised-stack emission, non-circular mouths under the influence of shifting winds, and oftentimes strongly heated jet …
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Compressible Flow Characterization Using Non-Intrusive Acoustic Measurements
… capabilities. In the first experiment, an unheated jet was used to verify that the acoustic technique could measure fluid velocities in high subsonic Mach number flows. The application demonstrated velocity root mean square (RMS) errors of 9 m/s in unheated jet flows up to Mach 0.83. Next, a …
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A Computational Analysis of the Aerodynamics and Aeroacoustics of Jets with Fluid Injection
… the effect of interior corrugation on the jet plume. The advantage is that the injection can be activated during takeoff and turned o_ during other phases of flight so that performance is not affected. Numerical simulations are performed on a military-style nozzle based on the GE …
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Quantitative measurements of temperature using laser-induced thermal grating spectroscopy in reacting and non-reacting flows
… cell at ambient temperature, a non-reacting heated jet at ambient pressure and a laminar premixed CH4/NH3/air flame operating at 0.5 MPa. Flame temperature measurements were acquired at various locations in the burned gas close to a water-cooled stagnation plate, demonstrating the capability …
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Integration and Evaluation of Unsteady Temperature Gages for Heat Flux Determination in High Speed Flows
… slugs of several materials and subjected to a heated jet with a total temperature of 620 K to examine the effects of material mismatch. A shock tube with a notional operating Mach of 2.6 was used to determine the thermal response of the gages as a function of time. In both tests, reference …
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The Effect of Thermal Non-Uniformity on Coherent Structures in Supersonic Free Jets
Supersonic jet exhaust plumes produce noise in jet engines, which has been a problem in the aerospace field. Researchers are working on ways to reduce this turbulent mixing noise, with little modification to the engine and nozzle. Prior work has shown that total temperature non-uniformity is a …
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Stability, LES, and Resolvent Analysis of Thermally Non-uniform Supersonic Jet Noise
… noise generation and dispersion in supersonic jets and focuses on the fluid-dynamic regime typical of high-performance turbojet and turbofan engines. The goal of my research is to understand how dispersion and propagation of wavepackets can be modified by noise reduction strategies based on …