Persian Army 560-330 Bc by Nicholas Sekunda, Simon Chew

By Nicholas Sekunda, Simon Chew

Книга Osprey Elite №42. Elite Forces of India and Pakistan Osprey Elite №42. Elite Forces of India and Pakistan Книги Исторические Автор: N.Secunda, S.Chew Формат: pdf Издат.:Osprey Страниц: sixty four Размер: 36 Mb ISBN: 1855322501 Язык: Английский0 (голосов: zero) Оценка:Сериявоенных книгElite от Osprey

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Persian Army 560-330 Bc

Книга Osprey Elite №42. Elite Forces of India and Pakistan Osprey Elite №42. Elite Forces of India and Pakistan Книги Исторические Автор: N. Secunda, S. bite Формат: pdf Издат. :Osprey Страниц: sixty four Размер: 36 Mb ISBN: 1855322501 Язык: Английский0 (голосов: zero) Оценка:Сериявоенных книгElite от Osprey

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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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