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Showing 1 to 11 of 11 for “"Swirling Jets"”.
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Dynamics of swirling jets and flames
Even the simplest swirling jet flows possess an astonishing degree of complexity. This complexity is a two-edged sword, presenting both a unique opportunity to advance the science of fluid mechanics as well as a major barrier for a variety of engineering applications. In particular, swirling jet …
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Global stability and control of swirling jets and flames
… for global hydrodynamic instability in swirling 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 …
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Hydrodynamic Stability of Periodically Unsteady Axisymmetric and Swirling Jets
Axisymmetric and swirling jets are generic flows that characterize many natural and man-made flows. These include cylindrical shear layer/mixing layer flows, aircraft jets and wakes, shedding of leading edge and wing tip vortices, tornadoes, astrophysical plasma flows and flows in mechanical …
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On Turbulent Swirling Jets: Vortex Breakdown, Coherent Structures, and their Control
Diese Arbeit umfasst die experimentelle und theoretische Untersuchung der Entstehung großskaliger kohärenter Strukturen in turbulenten Drallstrahlen. Die untersuchte Strö-mungskonfiguration zeichnet sich durch eine hohe Komplexität aufgrund gleichzeitig auftretender axialer und azimutaler …
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An experimental and numerical study of surface interactions in turbulent swirling jets
… rely on either a single or an array of fluid jets which impinge onto a surface. Traditionally, non-swirling impinging jets have been used, but interest surrounds possible advantages from imposing swirl into these jets to further promote heat and mass transfer at the surface. The challenge of …
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Swirling jets for the mitigation of hot spots and thermal Sstratification in the VHTR lower plenum
… state-of-the-art turbulence models and advanced swirling jet technology to mitigate the two issues. The primary research goals were to increase the heat transfer and mixing capacity of swirling jets, extend swirling jet theory, and to apply those advancements for the mitigation of the …
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Point Doppler velocimetry measurements in circular jets
… measurements for 1 inch diameter standard, swirling, and annular jets have been made at a nominal exit velocity of 60 m/s, corresponding to a Reynolds number of 100,000. Measurements of radial profiles of mean and RMS velocities were taken for each jet from the jet exit to X/D=12 at nine …
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Unstructured mesh - finite volume algorithms for swirling, turbulent, reacting flows
… the case when there is more than one source of swirling flow. These original features contribute to a Computational Fluid Dynamics code which is capable of solving swirling, turbulent fluid flow and reactive, radiative heat transfer on highly complex geometries. Specifically the techniques are …
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Flow and heat transfer characteristics of turbulent swirling impinging jets [thesis]
… industrial applications rely on impinging jets to impart convective heat and mass transfer in processes ranging from the cooling of electronic devices and gas turbine blades to drying of paper and food products. Conventionally, non-swirling impinging jets have been employed, but some …
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Uncertainty and sensitivity analysis of computational simulations of industrial jet flows
… with different objectives. First, an impinging swirling air jet for heat transfer purposes is generated by an axisymmetric rotating pipe. Despite that many mechanisms to generate swirling jets for heat transfer can be found in literature, there is no application with rotating pipes. To develop …
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Συστήματα καύσης με περιδίνιση : επίδραση εξωτερικής παράλληλης ροής σε μια περιδινούμενη δέσμη εκροής
Η διδακτορική διατριβή αφορά την πειραματική μελέτη του ισόθερμου ροϊκού πεδίου που αναπτύσσεται λόγω της αλληλεπίδρασης μιας περιδινούμενης δέσμης με μια εξωτερική παράλληλη ροή. Η συγκεκριμένη μελέτη έχει άμεση αναφορά σε διατάξεις καύσης (στροβιλοκινητήρες, φούρνους υαλουργίας, καυστήρες ντίζελ …