Visualization of Conventional and Combusting Subsonic Jet by Victor V. Kozlov, Genrich R. Grek, Yury A. Litvinenko

By Victor V. Kozlov, Genrich R. Grek, Yury A. Litvinenko

Based on new info bought on loose microjets, this e-book explains the newest phenomena in flame evolution within the presence of a transverse acoustic box with around and aircraft propane microjet combustion. It supplies an summary of modern experimental effects on instability and dynamics of jets at low Reynolds numbers and gives the reader, step-by-step, with the milestones and up to date advances in jet circulate balance and combustion. Readers also will find a explanation of the variations among top-hat and parabolic around and airplane jet instability.

Chapters display good points of the interplay among jet and crossflow, and the way experimental facts testify to similarities of the perturbed stream styles of laminar and turbulent around jets. an identical reaction of the jets to exterior acoustic oscillations is proven, in addition to the peculiarities of the impact of a transverse acoustic box on downstream evolution of around and aircraft macro- and microjets. uncomplicated good points of around and aircraft, macro and micro jets' evolution laid low with preliminary stipulations on the nozzle outlet and through environmental perturbations are highlighted.

scholars of fluid mechanics will achieve a great origin in hydrodynamic balance and combustion of subsonic jet move and researchers will price the presentation of specified facets of instability and transition. The paintings treats either theoretical and useful elements, and it comprises supplementary fabric similar to PowerPoint multimedia notes in line with result of laboratory clinical experiments.

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Visualization of Conventional and Combusting Subsonic Jet Instabilities

In keeping with new info acquired on unfastened microjets, this publication explains the newest phenomena in flame evolution within the presence of a transverse acoustic box with around and aircraft propane microjet combustion. It offers an summary of contemporary experimental effects on instability and dynamics of jets at low Reynolds numbers and offers the reader, step-by-step, with the milestones and up to date advances in jet move balance and combustion.

Additional resources for Visualization of Conventional and Combusting Subsonic Jet Instabilities

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Three smoke streaks are observed in the region of the “heads” (Fig. 6c). As is distinctly seen in Fig. 3 Interaction of the Primary Vortices with the Longitudinal Disturbances 19 Fig. 6 General view of the round jet (a); a cross section (b); streamwise sections at R1 (c) and R2 (d); positions of the ring vortices and the longitudinal perturbations are marked by 1 and 2, respectively (see Presentation Chap. 2: “Multimedia files Nos. com) vortices. Thus the streamwise elongated perturbations are likely spreading far downstream up to the jet turbulization.

In particular, varying the nozzle geometry and, hence, the velocity distribution near its exit, it is possible to modify instability of the jet and its dynamics. Such an approach to control of jet flows is the main subject of this chapter; see also the supplementing material Chap. 4: “Multimedia files Nos. com). 1 Experimental Technique In the present case, the test facility illustrated in Figs. 2 is distinguished by extension pipes of different length (430, 870, 1300, and 4000 mm) which could be attached to a nozzle of 20-mm diameter (d).

3 Top-hat (a) and parabolic (b) mean velocity profiles of the laminar plane jet at x = 2 (1), 5 (2), 9 (3), and 15 mm (4) behind the basic nozzle/extension channel outlet 6 Plane Jets Affected by Initial Conditions … 54 Fig. 4 Visualization of the laminar plane jet in natural conditions (1) and under external acoustic forcing at frequencies f = 30 (2), 40 (3), 50 (4), 60 (5), 70 (6), 90 (7) and 150 Hz (8) (see Presentation Chap. 6: “Multimedia files No. springer. 1 Characteristics of the laminar jet oscillations Conditions Natural, Fig.

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