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K41 Versus K62: Recent Developments Read chapter Read first chapter

2019 | OriginalPaper | Chapter

A New Method for the Formation of Free Jets with Long Laminar Regions

Authors : J. Zayko, A. Chicherina, S. Teplovodskii, A. Reshmin, V. Vedeneev

Published in: Fluid-Structure-Sound Interactions and Control

Publisher: Springer Singapore

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Abstract

A new method for the formation of free jets with long laminar regions using a small-size device is proposed. A free jet with a 0.12 m diameter at Reynolds numbers in the range of 2000–12560 is experimentally studied using thermoanemometer measurements of velocity and turbulent fluctuations profiles and laser visualisation of the flow. It is shown that the designed technology forms the free jet with a laminar region length of 5.5 jet diameters for an optimal regime with Re \(\sim 10000\). Numerical simulation of the flow in the forming unit and an inviscid hydrodynamic instability analysis of the jet with calculated profiles have been conducted to explain the existence of the optimal regime.

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Metadata
Title
A New Method for the Formation of Free Jets with Long Laminar Regions
Authors
J. Zayko
A. Chicherina
S. Teplovodskii
A. Reshmin
V. Vedeneev
Copyright Year
2019
Publisher
Springer Singapore
Book
Fluid-Structure-Sound Interactions and Control

Print ISBN: 978-981-10-7541-4

Electronic ISBN: 978-981-10-7542-1

Copyright Year: 2019

DOI
https://doi.org/10.1007/978-981-10-7542-1_28

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